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26th October 2022| Daily Answer Writing Enhancement
Topics for Today’s questions:
GS-1 Distribution of key natural resources across the world (including South Asia and the Indian sub-continent)
GS-2 Effect of policies and politics of developed and developing countries on India’s interests, Indian diaspora.
GS-3 Infrastructure: Energy, Ports, Roads, Airports, Railways etc.
GS-4 Probity in Governance:
Question 1)
Q.1 What are the different non-conventional energy sources available in India? Highlight their importance in providing eco-friendly energy. (15 Marks)
Question 2)
Q.2 Stories of exploitation and labour violations faced by Indian workers in the Gulf countries have come to light in recent times. Examining the issue at hand, list down some of the steps taken for labour welfare. (10 Marks)
Question 3)
Q.3 Discuss the various issues that hinder the development of the port infrastructure in India and state the recent measures taken by the government to address the same. (15 Marks)
Question 4)
Q.4 It is essential that people have access to information if they are to have the capacity to exercise other rights. Discuss the statement with focus on importance of RTI in governance. (10 Marks)
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Is Medical Education in Hindi Practicable?
Context
- The unveiling of the Hindi editions of the first professional MBBS books by Union Home Minister Amit Shah in Bhopal has stirred anti-Hindi agitations, with the Opposition, especially in the South, contending that the move is nothing more than a poll gimmick.
Why medical education should be in local language (Hindi)?
- Example of Non-English countries: Supporters of the move are quoting examples from China, Japan, Ukraine, Russia, and Norway – countries where official languages are the sole medium of instruction in all the technical and non-technical courses.
- Education in mother tongue is effective: If they can do so, why can’t we, they argue, especially as it is an established fact that imparting education in a student’s mother tongue is effective for learning.
Why English is best medium of English education?
- Teaching in local plus English language: Fifty-two medical colleges, out of the total 170 colleges on mainland China, whose graduates can attempt the USMLE (the entrance exam to practice in the US), teach in both Chinese and English. There has been a steep rise in the number of parents interested in enrolling their children – at just three years old – in ESL (English as a Second Language) courses.
- Less resources in Hindi: It is unwise to compare the status of Hindi to Chinese or German, given India’s diversity. Moreover, Hindi, or any other vernacular language, for that matter, offers far fewer resources to support the job-seeking young populace. Learning English, therefore, comes with a promise of roti, kapda, makaan (food, clothes, shelter.)
- Higher demand for English Medium: A few years ago, when newspapers reported on the closing down of government schools in Tamil Nadu, one of the major reasons cited was parents’ preoccupation with English-medium schools – leading them to deny free cash and food and admit their kids to low-end, mediocre English schools, instead.
- English is a great leveller: When it comes to higher education, English is a great leveller, allowing dialogue to continue with the rest of the world. Medicine, as evidence-based as it is, is constantly evolving with the introduction of novel research. Treating cases sometimes requires consulting multiple books, research papers, and journal articles, for which a sound system of translation needs to be established before we can even begin thinking about phasing out English.
- Issue of Translation: The people involved in the translation process spoke of two things, First, instead of “translation”, the books have been transliterated. The medical terminology remains the same; sentences have only been translated for easier reading. That too, in the most mainstream dialect of Hindi. Second, these books are to be used as “bridge books”, and not as replacements for the English ones, designed to address the initial hiccups students are bound to face.
- No clarity on roadmap: The initial announcement also fails to account for the necessary infrastructure. There has been no clarity on whether or how these translations will be incorporated as reading materials, and how they will evolve or change with time. Whether standard books like Harrison and Robbins would also be translated is anyone’s guess. Translating these tomes only once would not suffice as newer editions every three to five years incorporate significant changes.
- Training of teachers and conferences: Professors and other teaching staff would also need to be trained. Most of all, what about medical conferences, the staple of a medical student? Would they be organised in Hindi moving forward?
- Our medical industry is yet to develop: While basing our argument only on language, we often forget that Chinese healthcare is self-sufficient when it comes to research and protocols, or that Germany has primary resources available in their own language. Our focus right now should be to develop primary resources. Our medical industry is at way too nascent a stage to be speaking of language.
Conclusion
- Offering extra evening classes as done by AIIMS, Delhi could have been a better substitute given that the strength of students who struggle with English makes up about one to two per cent of the entire batch. Besides, no strict distinction exists between Hindi and non-Hindi-speaking states as most institutions have a portion of seats that are filled up by a pan-India entrance exam. Our focus should be on quality of education instead of medium of instruction.
Mains Question
Q. Medical education in English is more viable than local language. Explain. Why Government of India Supports the Medical education in Hindi?
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Oil and Dollar, Rising Prices and Impact on India
Context
- The two major irritants for India this year have been oil and the dollar. The two are a heady cocktail that has distorted all economic forecasts creating volatility that has never been witnessed earlier. Their impact is being felt across bond and stock markets, affecting the entire system. As a result, the RBI and the government have had to work overtime to mitigate the adverse effects on the economy.
What is the current oil prices situation?
- Unpredictable Prices: When the Ukraine war broke out, oil crossed the $120 mark (in April and again in June). It was expected that $150 was not far off. However, the range of $100-110 was restored and soon enough the price was back to the Nineties as all global commodity prices cooled off, even as the Ukraine war continued.
- Rising requirement of Europe: With the winter months approaching and Europe dependent on natural gas for heating, which now appears to be in jeopardy due to Russia turning off the taps, oil has received a boost even though the continent is looking more at coal.
- Reduction in production by OPEC: Add to this the fact that OPEC and its allies have decided to lower production by 2 million barrels a day and there is panic again. This shock is external over which neither the government nor RBI have any control.
- Growing Import Bills: High oil prices mean many things. Crude has a share of 30-33 per cent in total imports and any hike in prices increases the import bill. With exports declining due to the slowdown in global growth and imports increasing due to oil, the trade deficit and current account deficit will widen further. The trade deficit for the first half is $150 billion and can touch $300 billion this year at this strike rate.
- Possibility of Balance of Payment: This creates a problem for the current account deficit with components like software and remittances slowing down due to the recession in the west. Therefore, a balance of payments problem will surface. Ultimately it depends on how high oil will go. The RBI has assumed a $100/barrel. This looks reasonable at this point, but anything higher can create problems on the currency front.
- Increasing Inflation: Inflation per se will be an issue when prices are left to the market like ATF or LPG. But in the case of petrol and diesel, it will be a conundrum for the government. If the status quo prevails on price transmission, then oil marketing companies will have to bear the losses. If the government allows the market to correct, inflation will increase as it will also feed into intermediary costs such as freight.
- Higher input cost: User industries of oil like chemicals, plastics and fertilizers will face a problem again. Higher input costs will put pressure on profit margins and any pass through will be inflationary.
- Windfall tax may increase: The government would probably once again revisit the windfall tax on crude (as has been recently done) to examine if there is any additional revenue to be garnered. Such an environment always tends to spook markets.
- Rising bond yields: Bond yields move up every time oil prices rise while stock markets turn volatile normally in the downward direction.
How rising dollar prices affects India?
- Rupee is weakening: There is the dollar conundrum which should be seen in conjunction with the oil. The dollar has been strengthening against all currencies. As the Fed tightens rates, which will carry on through 2023, the dollar will become stronger. Other countries are already in a weak economic zone and are tightening rates with a lag. The rupee is bearing the brunt of this development. There is no escape as the RBI intervention in any form can only temporarily support the decline in the rupee. In the last month or so, since the rupee crossed the 80 mark and gone past 83.
- Negative sentiment of market: Another factor that will complicate matters is expectations. The recent news, for example, of global players deciding not to include Indian bonds in global indices might add to the negative sentiment in the market and exert pressure on the rupee.
- Imported inflation: The rupee depreciation also leads to importing inflation. All goods imported will come in at a higher rupee cost which will in turn push the RBI to act further.
- Less possibility of high export: The weak rupee may not quite help exports because the competitive advantage that normally comes along with such depreciation would be low given that other currencies are also declining.
- Trade deficit will rise: Imports are unlikely to slow down as a growing economy requires inputs and raw materials. This will mean further pressure on the trade deficit. The government will gain at the margin as customs collections increase.
- Volatile investors: The critical reaction will be that of investors. If foreign portfolio investors withdraw then there will be further pressure on the rupee while inflows would help to cushion the rupee.
- Centre may lose on revenue: State governments will be better off as their VAT collections would increase automatically. However, the Centre may not gain as the excise duty is a fixed rate.
Conclusion
- One can never tell as almost all forecasters have been proved wrong this year. The theory that RBI can intervene and protect certain levels of currency has its limitations. These travails have to be responded to as they cannot be controlled.
Mains Question
Q. How rising dollar and oil prices affects the macroeconomic stability in India? What are the steps taken by RBI and GOI to manage the macroeconomic stability?
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CBG: Renewable energy revolution
Context
- The beginnings of a renewable energy revolution rooted in agriculture are taking shape in India with the first bio-energy plant of a private company in Sangrur district of Punjab having commenced commercial operations on October 18. It will produce Compressed Biogas (CBG) from paddy straw, thus converting agricultural waste into wealth.
Background
- Stubble burning every year in north and northwest: It has become common practice among farmers in Punjab, Haryana and western Uttar Pradesh to dispose of paddy stubble and the biomass by setting it on fire to prepare fields for the next crop, which has to be sown in a window of three to four weeks. This is spread over millions of hectares.
- Resultant smog polluting environment: The resultant clouds of smoke engulf the entire National Capital Territory of Delhi and neighbouring States for several weeks between October to December. This plays havoc with the environment and affects human and livestock health.
- Stubble burning practice spreading rapidly across the country: Though paddy stubble burning in northwest India has received a lot of attention because of its severity of pollution, the reality is that crop residue burning is spreading even to rabi crops and the rest of the country. Unless these practices are stopped, the problem will assume catastrophic proportions.
What is Stubble Burning?
- Stubble (parali) burning is a method of removing paddy crop residues from the field to sow wheat from the last week of September to November.
- It is usually required in areas that use the combined harvesting method which leaves crop residue behind.
- This practice mostly carried out in Punjab, Haryana and UP contributes solely to the grave winter pollution in the national capital.
How stubble burning impacts environment and Human health?
- Deteriorates air quality: The process of burning farm residue is one of the major causes of air pollution in parts of north India, deteriorating the air quality.
- Source of various harmful gases: Stubble burning is a significant source of carbon dioxide (CO2), volatile organic compounds (VOCs), nitrogen oxides (NOx) and hydrocarbons (HC).
- Air Pollution: Stubble burning emits toxic pollutants in the atmosphere containing harmful gases like Carbon Monoxide (CO), methane (CH4), carcinogenic polycyclic aromatic hydrocarbons, volatile organic compounds (VOC). These pollutants disperse in the surroundings and eventually affect air quality and people’s health by forming a thick blanket of smog. Along with vehicular emissions, it affects the Air Quality Index (AQI) in the national capital and NCR.
- Soil degradation: Soil becomes less fertile and its nutrients are destroyed when the husk is burned on the ground. Organic content of soil is completely destroyed. Stubble burning generates heat that penetrates into the soil, causing an increase in erosion, loss of useful microbes and moisture.
Some of the measures taken by Government for the effective prevention and control of stubble burning
- The Commission for Air Quality Management: The Commission for Air Quality Management in National Capital Region and Adjoining Areas (CAQM) had developed a framework and action plan for the effective prevention and control of stubble burning,
- In-situ management: The framework/action plan includes in-situ management, i.e., incorporation of paddy straw and stubble in the soil using heavily subsidized machinery (supported by crop residue management (CRM) Scheme of the Ministry of Agriculture and Farmers Welfare).
- Ex-situ management: Ex-situ CRM efforts include the use of paddy straw for biomass power projects and co-firing in thermal power plants, and as feedstock for 2G ethanol plants, feed stock in CBG plants, fuel in industrial boilers, waste-to-energy (WTE) plants, and in packaging materials, etc.
- Awareness generation programme: Additionally, measures are in place to ban stubble burning, to monitor and enforce this, and initiating awareness generation.
- Project by NITI Aayog along with FAO: NITI Aayog approached FAO India in 2019 to explore converting paddy straw and stubble into energy and identify possible ex-situ uses of rice straw to complement the in-situ programme.
- Rice straw for producing CBG: A techno-economic assessment of energy technologies suggested that rice straw can be cost-effective for producing CBG and pellets. Pellets can be used in thermal power plants as a substitute of coal and CBG as a transport fuel.
- SATAT initiative: With 30% of the rice straw produced in Punjab, a 5% CBG production target set by the Government of India scheme, “Sustainable Alternative Towards Affordable Transportation (SATAT)” can be met. It could also increase local entrepreneurship, increase farmers’ income and reduce open burning of rice straw.
- Encouraging private players to produce CBG more and reduce CO2 emissions: Verbio India Private Limited, a 100% subsidiary of the German Verbio AG, got approval from the Punjab government in April 2018 to set up a bio-CNG project that will utilise about 2.1 lakh tonnes of a total of 18.32 million tonnes of paddy straw annually. The plant will use one lakh tonnes of paddy straw produced from approximately 16,000 hectares of paddy fields. Paddy residue will be collected from this year to produce 33 tons of CBG and 600-650 tonnes of fermented organic manure/slurry per day this will reduce up to 1.5 lakh tonnes of CO2 emissions per year.
FAO Study on developing crop residue supply chain
- Use of Rice straw: In technical consultations with the public and private sectors, the FAO published its study on developing a crop residue supply chain in Punjab that can allow the collection, storage and final use of rice straw for other productive services, specifically for the production of renewable energy.
- Required Investment and benefits farmers: The results suggest that to mobilise 30% of the rice straw produced in Punjab, an investment of around ₹2,201 crore ($309 million) would be needed to collect, transport and store it within a 20-day period. This would reduce greenhouse gas (GHG) emissions by about 9.7 million tonnes of CO2 equivalent and around 66,000 tonnes of PM2.5. Further, depending on market conditions, farmers can expect to earn between ₹550 and ₹1,500 per ton of rice straw sold, depending on market conditions.
Interesting to read: Compressed Bio Gas (CBG)
- Biogas is produced naturally through a process of anaerobic decomposition from waste / bio-mass sources like agriculture residue, cattle dung, sugarcane press mud, municipal solid waste, sewage treatment plant waste, etc.
- After purification, it is compressed and called CBG, which has a pure methane content of over 95%.
- CBG is exactly similar to the commercially available natural gas in its composition and energy potential.
- With calorific value (~52,000 KJ/kg) and other properties similar to CNG, CBG can be used as an alternative, renewable automotive fuel.
- Given the abundance of biomass in the country, CBG has the potential to replace CNG in automotive, industrial and commercial uses in the coming years.
Conclusion
- Encouraging private players for producing CBG appears to be a first win-win initiative in the form of environmental benefits, renewable energy, value addition to the economy, farmers’ income and sustainability. This initiative is replicable and scalable across the country and can be a game changer for the rural economy.
Mains Question
Q. What is Stubble burning? Discuss the measures taken by Government for the effective prevention and control of stubble burning and producing CBG could be a win-win situation.
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What is FCRA and its recent amendments?
Recently, the Ministry of Home Affairs amended certain provisions of the Foreign Contribution (Regulation) Act (FCRA).
- The Ministry had made the FCRA rules tougher in November 2020, making it clear that NGOs (Non-Government Organizations) which may not be directly linked to a political party but engage in political action like bandhs, strike or road blockades will be considered of political nature if they participate in active politics or party politics. According to the law, all NGOs receiving funds have to registered under the FCRA.
- The move comes after the government enhanced the import duty on gold import from 7.5 % to 12.5 % in a bid to discourage import of gold that leads to increase in trade deficit and puts pressure on the currency and forex reserves.
- An increase in import duty on gold will lead to increase in cost of import and discourage its import and consumption.
What is the FCRA?
- About:
- The FCRA was enacted during the Emergency in 1976 in an atmosphere of apprehension that foreign powers were interfering in India’s affairs by pumping in funds through independent organisations.
- These concerns had been expressed in Parliament as early as in 1969.
- The law sought to regulate foreign donations to individuals and associations so that they functioned “in a manner consistent with the values of a sovereign democratic republic”.
- The FCRA was enacted during the Emergency in 1976 in an atmosphere of apprehension that foreign powers were interfering in India’s affairs by pumping in funds through independent organisations.
- Objectives:
- It requires every person or NGO wishing to receive foreign donations to be registered under the Act, to open a bank account for the receipt of the foreign funds and to utilise those funds only for the purpose for which they have been received and as stipulated in the Act.
- The Act prohibits receipt of foreign funds by candidates for elections, journalists or newspaper and media broadcast companies, judges and government servants, members of legislature and political parties or their office-bearers, and organisations of a political nature.
- Amendments:
- It was amended in 2010 to “consolidate the law” on utilisation of foreign funds, and “to prohibit” their use for “any activities detrimental to national interest”
- The law was amended again by the current government in 2020, giving the government tighter control and scrutiny over the receipt and utilisation of foreign funds by NGOs.
What are the Key Changes?
- It allows Indians to receive up to Rs 10 lakh annually from their relatives abroad under FCRA.
- The limit earlier was Rs 1 lakh.
- If the amount exceeds, the individuals will now have 90 days to inform the government instead of 30 days earlier.
- It has given individuals and organisations or NGOs 45 days for the application of obtaining ‘registration’ or ‘prior permission‘ under the FCRA to receive funds.
- Earlier it was 30 days.
- Organisations receiving foreign funds will not be able to use more than 20 % of such funds for administrative purposes.
- This limit was 50 % before 2020.
- Made five more offences under the FCRA “compoundable”, making 12, instead of directly prosecuting the organisations or individuals.
- Earlier, only seven offences under the FCRA were compoundable.
What are Compoundable Offences?
- Compoundable offences are those offences where, the complainant (one who has filed the case, i.e., the victim), enter into a compromise, and agrees to have the charges dropped against the accused. However, such a compromise should be a “Bonafide,” and not for any consideration to which the complainant is not entitled to.
- The FCRA violations which have become compoundable now include failure to intimate about receipt of foreign funds, opening of bank accounts, failure to place information on website, etc.
What is the Significance of the Move?
- Enhances Remittances:
- It will curb the outflow of funds and on the other hand enhancing inward Remittances.
- Stabilise forex Reserves:
- It will lead to an increase in inflow of funds into India which will stabilise the forex reserves and also the currency.
- Similarly, an increase in import duty on gold from 7.5 % to 12.5 % will discourage gold import as it will result in an increase in the price of gold in India.
- Reduces Trade Deficit:
- An increase in inflow of funds and reduction in outflow of funds on account of gold imports will help reduce the trade deficit.
- The trade deficit in the month of April and May 2022 stood at a high of USD 20.1 billion and USD 24.6 billion respectively making an aggregate of USD 44.7 billion in two months.
- By comparison the trade deficit in April and May 2021 stood at USD 21.8 billion.
- An increase in inflow of funds and reduction in outflow of funds on account of gold imports will help reduce the trade deficit.
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Why freight trains are switching to aluminium wagons?
The Union Railway Minister has recently flagged off the country’s first freight train with an all-aluminium wagon rake.
What is the news?
- This move is a part of the country’s ambitious plan to modernize rail transportation and facilitate large carbon savings.
Aluminium-bodied trains
- Indian Railways proposes to shift its passenger and freight operations gradually to aluminium-bodied trains.
- A blueprint for its production and introduction was finalized even before the onset of the covid-19 pandemic.
- The Modern Coach Factory (MCF) at Rae Bareli has signed a transfer of technology contract with South Korea’s Dawonsys for such passenger coaches in early 2020.
- The execution of the project was held back because of the pandemic and its fallout.
- These coaches will be rolled out now.
What is the plan for their introduction?
- At present, India’s high-speed trains, including the Rajdhanis and the Shatabdis, use Linke Hofmann Busch (LHB) coaches that are made of stainless steel.
- Only the interiors use aluminium, which makes them lighter as compared to conventional rakes.
- The Indian Railways plans to procure 400 new generation Vande Bharat train sets with better energy efficiency and passenger riding experience.
- The use of aluminium body coaches in these new generation trains will be considered.
Will aluminium trains reduce carbon footprint?
- Aluminium trains consume less energy.
- Besides, the metal is recyclable.
- It is estimated that switching to aluminium will save 1,500 tonnes of carbon emissions a year.
- With the Railways planning to deploy over 100,000 wagons in the coming years, the potential annual CO2 reduction could be to the tune of over 5 million tonnes with a 15-20% shift to aluminium wagons.
Material advantages of aluminium
- These coaches, being lighter than stainless steel ones, are preferred for higher speed systems.
- They are lighter by up to 30% compared to stainless steel coaches.
- They offer low haulage cost and higher payload, better fuel efficiency and lower pollution levels.
- Also, aluminium trains take less time to manufacture and thus can help speed up capacity for production.
- The new metal trains will help the Railways hike its share in overall freight transportation from the current 18%.
What about the cost of building?
- An all-aluminium passenger coach and wagon system would raise the cost of manufacturing rolling stocks by about 35% since the price of aluminium, globally, is far higher than that of steel.
- However, the advantages of the metal outscore its high price. It is estimated that as the metal is recyclable, the new coaches would have up to 80% resale value.
- The recyclability will also help in times of global volatility in metal prices.
- This is why aluminium trains command a lion’s share in the US, Europe and Japan.
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What is Post-Disaster Needs Assessment (PDNA)?
Post-Disaster Needs Assessment (PDNA) is now being done simultaneously in Assam, Himachal Pradesh, Gujarat, Karnataka, Jharkhand, Maharashtra, Odisha and Meghalaya.
Why in news?
- PDNA is now being used to evaluate the financial and social cost of local disasters in eight states in India.
- These states all experienced severe flooding in the last few months.
- The results of these assessments are likely to come out next month.
What is PDNA?
- PDNA is an internationally accepted methodology for determining the physical damages, economic losses, and costs of meeting recovery needs after a natural disaster through a government-led process.
- It is an international framework for assessing losses and damages in the aftermath of a disaster.
- The framework helps get recovery and reconstruction efforts right following a disaster.
- Globally, of the 55 PDNAs conducted worldwide since 2008, only two droughts — one in Malawi and the other Marshall Islands in 2016 — were of slow-onset disasters.
Components of PDNA
- PDNA includes a calculation of the disaster’s impact on Gross Domestic Product, the balance of payment and fiscal budget.
- Secondly, how this affects the flow of revenue to multiple sectors is evaluated.
- For example, the number of farmers’ income affected per damaged acre of land and the livelihoods lost.
- Overall, a quantitative assessment is additionally done on the social and environmental impact of the disaster.
History of PDNA in India
- This is not the first time PDNA has been conducted in India.
- It was first adopted during the Kerala floods of 2018 and again during the cyclone in Odisha in 2019, both unprecedented disasters.
- Until now, the assessment was only limited to massive disasters that required international funding from the World Bank, the Asian Development Bank and the United Nations.
15th Finance Commission provision
- The 15th finance commission report of 2021, for the first time, made a provision for recovery and reconstruction in the national disaster management budget, which is at the core of the PDNA.
- The states did not receive international funding to do the current ongoing PDNAs, as they are expected to take the money from the budget.
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What are Eclipses?
India recently witnessed a partial solar eclipse. Let’s take a look over all dynamics of Eclipses.
What are Eclipses?
- An eclipse takes place when one heavenly body such as a moon or planet moves into the shadow of another heavenly body.
- There are two types of eclipses on Earth: an eclipse of the Moon and an eclipse of the Sun.
[I] A Lunar Eclipse
- The moon moves in an orbit around Earth, and at the same time, Earth orbits the sun. Sometimes Earth moves between the sun and the moon.
- When this happens, Earth blocks the sunlight that normally is reflected by the moon. (This sunlight is what causes the moon to shine.)
- Instead of light hitting the moon’s surface, Earth’s shadow falls on it. This is an eclipse of the moon — a lunar eclipse.
- A lunar eclipse can occur only when the moon is full. (But not every full moon is also a lunar eclipse. Can you guess why?)
Observing a Lunar Eclipse
- A lunar eclipse can be seen from Earth at night.
- A lunar eclipse usually lasts for a few hours.
- At least two partial lunar eclipses happen every year, but total lunar eclipses are rare.
There are two types of lunar eclipses: total lunar eclipses and partial lunar eclipses.
- A total lunar eclipse occurs when the moon and the sun are on exact opposite sides of Earth. Although the moon is in Earth’s shadow, some sunlight reaches the moon. The sunlight passes through Earth’s atmosphere, which causes Earth’s atmosphere to filter out most of the blue light. This makes the moon appear red to people on Earth.
- A partial lunar eclipse happens when only a part of the moon enters Earth’s shadow. In a partial eclipse, Earth’s shadow appears very dark on the side of the moon facing Earth. What people see from Earth during a partial lunar eclipse depends on how the sun, Earth and moon are lined up.
- In a penumbral lunar eclipse, only the more diffuse outer shadow of Earth – the penumbra – falls on the moon’s face. This third kind of lunar eclipse is much more subtle, and much more difficult to observe than either a total or partial eclipse of the moon.
[II] A Solar Eclipse
- Sometimes when the moon orbits Earth, it moves between the sun and Earth.
- When this happens, the moon blocks the light of the sun from reaching Earth.
- This causes an eclipse of the sun or solar eclipse.
- During a solar eclipse, the moon casts a shadow onto Earth.
There are three types of solar eclipses.
The first is a Total Solar Eclipse
- A total solar eclipse is only visible from a small area on Earth.
- The people who see the total eclipse are in the centre of the moon’s shadow when it hits Earth.
- The sky becomes very dark as if it were night. For a total eclipse to take place, the sun, moon and Earth must be in a direct line.
The second type is a Partial Solar Eclipse
- This happens when the sun, moon and Earth are not exactly lined up.
- The sun appears to have a dark shadow on only a small part of its surface.
The third type is an Annular Solar Eclipse
- An annular eclipse happens when the moon is farthest from Earth. Because the moon is farther away from Earth, it seems smaller. It does not block the entire view of the sun. The moon in front of the sun looks like a dark disk on top of a larger sun-coloured disk. This creates what looks like a ring around the moon.
- During a solar eclipse, the moon casts two shadows on Earth. The first shadow is called the Umbra. This shadow gets smaller as it reaches Earth. It is the dark centre of the moon’s shadow.
- The second shadow is called the Penumbra. The penumbra gets larger as it reaches Earth. People standing in the penumbra will see a partial eclipse. People standing in the umbra will see a total eclipse.
Observing a Solar Eclipse
- Solar eclipses happen once every 18 months.
- Unlike lunar eclipses, solar eclipses only last for a few minutes.
Why don’t solar eclipses happen at every New Moon?
- The reason is that the Moon’s orbit tilts 5° to Earth’s orbit around the Sun.
- Astronomers call the two intersections of these paths nodes.
- Eclipses only occur when the Sun lies at one node and the Moon is at its New (for solar eclipses) or Full (for lunar eclipses) phase.
- During most (lunar) months, the Sun lies either above or below one of the nodes, and no eclipse happens.
[III] Planet Transits
- When a planet comes between Earth and the Sun, it is called a transit.
- The only 2 planets that can be seen transiting the Sun from Earth are Venus and Mercury because they are the only planets that orbit inside Earth’s orbit.
- From 2000–2199, there will be 14 transits of Mercury.
- However, Venus transits are even rarer with only 2 this century, in 2004 and 2012.
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