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Subject: Space Technology

  • Hope: UAE’s first mission to Mars

    The first Arab interplanetary mission is expected to reach Mars’ orbit on February 9 in what is considered the most critical part of the journey to unravel the secrets of weather on the Red Planet.

    Try this question from CSP 2014:

    Q.Which of the following pair is/are correctly matched?

    Spacecraft Purpose
    1. Cassini-Huygens Orbiting the Venus and transmitting data to the Earth
    2. Messenger Mapping and investigating the Mercury
    3. Voyager 1 and 2 Exploring the outer solar system

    Select the correct answer using the code given below.

    a) 1 only

    b) 2 and 3 only

    c) 1 and 3 only

    d) 1, 2 and 3

    Hope Mission

    • The Emirates Mars Mission called “Hope” was announced in 2015 with the aim of creating mankind’s first integrated model of the Red planet’s atmosphere.
    • Hope weighs over 1500 kg and will carry scientific instruments mounted on one side of the spacecraft, including the Emirates exploration Imager (EXI), which is a high-resolution camera among others.
    • The spacecraft will orbit Mars to study the Martian atmosphere and its interaction with outer space and solar winds.
    • Hope will collect data on Martian climate dynamics, which should help scientists understand why Mars’ atmosphere is decaying into space.

    Objectives of the mission

    • Once it launches, Hope will orbit Mars for around 200 days, after which it will enter the Red planet’s orbit by 2021, coinciding with the 50th anniversary of the founding of UAE.
    • The mission is being executed by the Mohammed bin Rashid Space Centre, UAE’s space agency.
    • It will help answer key questions about the global Martian atmosphere and the loss of hydrogen and oxygen gases into space over the span of one Martian year.

  • Square Kilometre Array Observatory

    The Square Kilometre Array Observatory (SKAO) Council held its maiden meeting and approved the establishment of the world’s largest radio telescope.

    Note all important telescopes in news and their features. Some of them are – Thirty Meter Telescope, Giant Metrewave Radio Telescope, Spitzer, Chandra etc.

    SKAO

    • It is a new intergovernmental organisation dedicated to radio astronomy and is headquartered in the UK.
    • At the moment, organisations from ten countries are a part of the SKAO.
    • These include Australia, Canada, China, India, Italy, New Zealand, South Africa, Sweden, the Netherlands and the UK.

    What are radio telescopes?

    • Unlike optical telescopes, radio telescopes can detect invisible gas and, therefore, they can reveal areas of space that may be obscured by cosmic dust.
    • Significantly, since the first radio signals were detected by physicist Karl Jansky in the 1930s, astronomers have used radio telescopes to detect radio waves emitted by different objects in the universe and explore it.
    • According to NASA, the field of radio astronomy evolved after World War II and became one of the most important tools for making astronomical observations since.

    The Arecibo telescope in Puerto Rico, which was the second-largest single-dish radio telescope in the world, collapsed in December 2020.

    Significance of SKA telescope

    • The telescope, proposed to be the largest radio telescope in the world, will be located in Africa and Australia whose operation, maintenance and construction will be overseen by SKAO.
    • Some of the questions that scientists hope to address using this telescope include the beginning of the universe, how and when the first stars were born and the life-cycle of a galaxy.
    • It would explore the possibility of detecting technologically-active civilizations elsewhere in our galaxy and understanding where gravitational waves come from.
    • As per NASA, the telescope will accomplish its scientific goals by measuring neutral hydrogen over cosmic time, accurately timing the signals from pulsars in the Milky Way.

  • Stardust 1.O: the first rocket to run on biofuel

    Stardust 1.O was recently launched from Maine, the US has become the first commercial space launch powered by biofuel.

    UPSC may puzzle you with the following type of MCQ asking:

    Q.Which of the following is the unique feature of the Stardust 1.0 Spacecraft recenlty seen in news?

    (a) It is propelled by Bio-fuels.

    (b) It has the largest payload capacity.

    (c) It is re-usable launch vehicle.

    (d) All of the above

    What is Stardust 1.O?

    • Stardust 1.O is a launch vehicle suited for student and budget payloads.
    • The rocket is manufactured by bluShift, an aerospace company based in Maine that is developing rockets that are powered by bio-derived fuels.
    • The rocket is 20 feet tall and has a mass of roughly 250 kg.
    • The rocket can carry a maximum payload mass of 8 kg and during its first launch carried three payloads.
    • The payloads included a cubesat prototype built by high-school students, a metal alloy designed to lessen vibrations.

    Why such missions are important?

    • Such efforts are a part of a growing number of commercial space companies that are working to provide easier and cheaper access to space to laypeople.
    • It also makes access to space cost-effective for purposes of academic research, corporate technology development and entrepreneurial ventures among others.

    Back2Basics: Biofuel

    • Biofuels are obtained from biomass, which can be converted directly into liquid fuels that can be used as transportation fuels.
    • The two most common kinds of biofuels in use today are ethanol and biodiesel and they both represent the first generation of biofuel technology.
    • Ethanol, for instance, is renewable and made from different kinds of plant materials.
    • Biodiesel on the other hand is produced by combining alcohol with new and used vegetable oils, animal fats or recycled cooking grease.

    Categories of biofuels

    Biofuels are generally classified into three categories. They are

    1. First-generation biofuels – First-generation biofuels are made from sugar, starch, vegetable oil, or animal fats using conventional technology. Common first-generation biofuels include Bioalcohols, Biodiesel, Vegetable oil, Bioethers, Biogas.
    2. Second-generation biofuels – These are produced from non-food crops, such as cellulosic biofuels and waste biomass (stalks of wheat and corn, and wood). Examples include advanced biofuels like biohydrogen, bioethanol.
    3. Third-generation biofuels – These are produced from micro-organisms like algae.

  • Type-II Supernova and the role of neutrinos

    This newscard is an excerpt from the original article published in The Hindu.

    Another space-based abstract terminology has appeared in TH.

    What is the news about?

    • Many stars, towards the end of their lifetimes, form supernovas – massive explosions that send their outer layers shooting into the surrounding space.
    • Most of the energy of the supernova is carried away by neutrinos – tiny particles with no charge and which interact weakly with matter.
    • Researching the mechanisms of the so-called Type II supernovas, a team from IIT Guwahati has come up with new insights into the part played by neutrinos in this dramatic death of massive stars.

    What are Neutrinos?

    • Proton, neutron, and electron are tiny particles that makeup atoms.
    • The neutrino is also a tiny elementary particle, but it is not part of the atom.
    • Neutrino has a very tiny mass, no charge and spins half.
    • It interacts very weakly with other matter particles.
    • Neutrinos come from the sun (solar neutrinos) and other stars, cosmic rays that come from beyond the solar system, and from the Big Bang from which our Universe originated.
    • They can also be produced in the lab.

    Their types

    • Neutrinos come in three ‘flavours’, another name for ‘types’, and each flavour is associated with a light elementary particle.
    • For instance, the electron-neutrino is associated with the electron; the muon-neutrino with the muon and the tau-neutrino with the tau particle.

    What is Supernova?

    • All the stars burn nuclear fuel in their cores to produce energy.
    • The heat generates internal pressure which pushes outwards and prevents the star from collapsing inward due to the action of gravity on its own mass.
    • But when the star ages and runs out of fuel to burn, it starts to cool inside.
    • This causes a lowering of its internal pressure and therefore the force of gravity wins; the star starts to collapse inwards.
    • This builds up shock waves because it happens very suddenly, and the shock wave sends the outer material of the star flying. This is what is perceived as a supernova. This happens in very massive stars.

    Try this PYQ:

    Q. Which of the following is/are cited by the scientists as evidence/evidence for the continued expansion of the universe?

    1. Detection of microwaves in space
    2. Observation of redshirt phenomenon in space
    3. Movement of asteroids in space
    4. Occurrence of supernova explosions in space code

    (a) 1 and 2 only

    (b) 2 only

    (c) 1, 3 and 4

    (d) None of the above can be cited as evidence

    The Type-II Supernova

    • In stars that are more than eight times as massive as the Sun, the supernova is accompanied by a collapsing of the inner material of the dying star – this is also known as core-collapse supernova or Type II supernova.

    Role of neutrinos

    • The collapsing core may form a black hole or a neutron star, according to its mass.
    • As they spew out of the raging supernova, the neutrinos can change from one flavour to another in a process known as neutrino oscillations.
    • Due to the high density and energy of the supernova, it generates neutrino oscillations happening simultaneously over different energies (unlike normal neutrino oscillation), termed collective neutrino oscillation.
    • The oscillation result may dramatically change when one allows the evolution with the angular asymmetry, the oscillations can happen at a nanosecond time scale, termed fast oscillation.

  • What caused the tilt to Saturn’s rotation axis?

    The tilt of the rotation axis of the gas giant Saturn may in fact be caused by its moons, space scientists have reported in the journal Nature Astronomy.

    About Saturn

    • Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter.
    • It is a gas giant with an average radius of about nine times that of Earth.
    • It only has one-eighth the average density of Earth; however, with its larger volume, Saturn is over 95 times more massive.

    Reasons for Saturn’s tilt

    • Saturn’s axis interacted with the path of the planet Neptune and gradually tilted until it reached the inclination of 27 degrees observed today.
    • This current tilt of Saturn’s rotation axis is caused by the migration of its satellites, and especially by that of its largest moon, Titan.
    • Recent observations have shown that Titan and the other moons are gradually moving away from Saturn much faster than astronomers had previously estimated.
    • By incorporating this increased migration rate into their calculations, the researchers concluded that this process affects the inclination of Saturn’s rotation axis.

    Try this PYQ:

    Q.Which phenomenon has Venusian winds rotating 60 times faster than the planet below on the dark side?

    (a) Super rotation

    (b) Monrotation

    (c) Dual rotation

    (d) Macrrotation

    Continuous tilting

    • As its satellites move further away, the planet tilts more and more.
    • In fact, Saturn’s axis is still tilting, and what we see today is merely a transitional stage in this shift.
    • Over the next few billion years, the inclination of Saturn’s axis could more than double.

    Why it matters?

    • The decisive event that tilted Saturn is thought to have occurred relatively recently.
    • For over three billion years after its formation, Saturn’s rotation axis remained only slightly tilted.
    • It was only roughly a billion years ago that the gradual motion of its satellites triggered a resonance phenomenon that continues today.

  • What is Dark Matter?

    Space scientists from the University of Sussex have found a new way to know more about dark matter. They have narrowed down the range of masses within which particles that could make up dark matter may lie in.

    What is the news about?

    • Around 95 % of the Universe is unknown to human beings.
    • It is often referred to as dark which has nothing to do with the colour of any substance but to do with the unknown nature of cosmic entities known as dark matter and dark energy.

    Trending in news these days is the Quantum Technology. (as it used to be until last year were- the Internet of Things (IoT) CSP 2019, Artificial Intelligence (AI) etc.)

    Must read all this news in a loop:

    1. National Mission on QC
    2. Quantum Coin
    3. Quantum Supremacy
    4. Quantum Entanglement

    What is Dark Matter?

    • Dark matter is composed of particles that do not absorb, reflect, or emit light, so they cannot be detected by observing electromagnetic radiation.
    • Dark matter is a form of matter thought to account for approximately 85% of the matter in the universe and about a quarter of its total mass-energy density or about 2.241×10−27 kg/m3.

    What does the research say?

    • Scientists carried out the research using quantum gravity, a field of study that tries to combine two of Einstein’s concepts — quantum physics and general relativity theory of gravity.
    • This is the first time anyone has thought of using what we know about quantum gravity to calculate the mass range for dark matter.
    • Their research shows that the dark matter particles can neither be super light nor super heavy unless there is a force acting on it that is yet unknown.

    Quantum gravity: The concept

    • Quantum gravity is a field of theoretical physics that seeks to describe gravity according to the principles of quantum mechanics.
    • Quantum mechanics is a fundamental theory in physics which describes nature at the smallest scales of energy levels of atoms and subatomic particles.
    • Here quantum effects cannot be ignored, such as in the vicinity of black holes or similar compact astrophysical objects where the effects of gravity are strong, such as neutron stars.

    Significance of the findings

    • This might help in finding out more about this mysterious force. There are currently four known forces in the Universe — gravitational, electromagnetic, weak and strong.
    • Scientists estimate that roughly 68 per cent of the Universe is made up of dark energy which is responsible for the accelerated expansion of the Universe.
    • Another 27 per cent is a dark matter whose existence was inferred from the observation that ordinary matter in galaxies, including the Milky Way, is far less than that required by gravity to hold the galaxies together.

    Why does the ‘Dark Matter’ matter?

    • Dark matter’s gravitational effects are also necessary to explain the motions of clusters of galaxies and the structure of the entire Universe at the largest scale.
    • On smaller scales, dark matter is too diffused to impact the motion of the Solar System, Earth or the origin and evolution of humans in any significant way.
    • But the nature of that dark matter is still unclear. It is most likely made of particles that do not couple to light because of which humans cannot see them.

  • NASA’s Curiosity Rover celebrates 3000 days on Mars

    The Mars rover ‘Curiosity’ has completed 3,000 Martian days.

    Try this PYQ:

    Q.Which region of Mars has a densely packed river deposit indicating this planet had water 3.5 billion years ago?

    (a) Aeolis Dorsa

    (b) Tharsis

    (c) Olympus Mons

    (d) Hellas

    Curiosity Rover

    • Curiosity is an SUV-sized Mars rover designed to explore the Gale crater on Mars as part of NASA’s Mars Science Laboratory (MSL) mission
    • The main mission of Curiosity was “to search areas of Mars for past or present conditions favourable for life, and conditions capable of preserving a record of life.”
    • It has a suite of instruments:
    1. A gas chromatograph, a mass spectrometer, a tunable laser spectrometer, X-ray diffraction, fluorescence instrument help study the rocks
    2. The Mars Hand Lens Imager (for close-up pictures) and a Mast Camera (to take photos of the surroundings)
    3. An instrument named ChemCam to vaporize thin layers of Martian rocks.
    4. Radiation Assessment Detector to study the radiation environment at the surface of Mars
    5. Rover Environmental Monitoring Station to measure atmospheric pressure, temperature, humidity, winds, plus ultraviolet radiation levels
    6. Dynamic Albedo of Neutrons instrument to measure subsurface hydrogen

    Back2Basics: Martian Day/ Sol

    • Coincidentally, the duration of a Martian day aka ‘Sol’ is within a few per cent of that of an Earth day, which has led to the use of analogous time units.
    • A sol is slightly longer than an Earth day. It is approximately 24 hours, 39 minutes, 35 seconds long.
    • A Martian year is approximately 668 sols, equivalent to approximately 687 Earth days.
    • Mars has an axial tilt and a rotation period similar to those of Earth.
    • Thus, it experiences seasons of spring, summer, autumn and winter much like Earth.

  • ‘Recoiling’ Black Holes

    A supermassive black hole, which is estimated to weigh up to 100 billion times the mass of the Sun, is seemingly missing, leaving astronomers perplexed.

    Try this PYQ:

    Q.Recently, scientists observed the merger of giant ‘blackholes’ billions of light-years away from the Earth. What is the significance of this observation?

    (a) ‘Higgs boson particles’ were detected.

    (b) ‘Gravitational waves’ were detected.

    (c) Possibility of inter-galactic space travel through ‘wormhole’ was confirmed.

    (d) It enabled scientists to understand ‘singularity’.

    The ‘missing’ black hole

    • The black hole is supposed to be located in Abell 2261, an enormous galaxy cluster that is about 2.7 billion light-years away from our planet.
    • So, when we look at a celestial object, we are looking at how it appeared that long ago in the past.
    • At 2.7 billion light-years away, the Abell galaxy is at an overwhelmingly large distance away from us.

    What could have happened?

    • Every large galaxy in the universe has a supermassive black hole at its centre, whose mass is millions or billions of times that of the Sun, says NASA.
    • The black hole at the centre of our galaxy– the Milky Way– is called Sagittarius A*, and is 26,000 light-years away from Earth.
    • Scientists have been using data gathered in 1999 and 2004 to look for the centre of the Abell galaxy, but have so far been unable to find its black hole.
    • A reason for this could be that Abell’s black hole has been ejected from the centre of the galaxy.

    Recoil of Black Holes

    • When two black holes merge, they release what is known as gravitational waves– invisible ripples travelling at the speed of light, which squeeze and stretch anything in their path.
    • As per the theory of gravitational waves, during such a merger, when the amount of waves generated in one direction is stronger than another, the new big black hole can be sent away from the centre of the galaxy into the opposite direction.
    • This is known as a “recoiling” black hole.
    • So far, though, scientists are yet to find definitive evidence for recoiling black holes and are still to discover whether supermassive black holes can merge and release gravitational waves.
    • As of now, only mergers of significantly smaller black holes have been verified.

    Why it is significant?

    • The researchers assert that this may have happened because of the merging of two smaller galaxies to form Abell– a process in which both of their black holes merged to form an even bigger black hole.
    • If this hypothesis turns out to be true, it would mean a major breakthrough in astronomy.

    Back2Basics:

  • Mukundpura CM2

    An asteroid which made its landfall in Mukundpura village near Jaipur has been named after the same village and is under the study of Geological Survey of India, Kolkata.

    Try this question from CSP 2014:

    Q.What is a coma, in the content of astronomy?

    (a) Bright half of material on the comet

    (b) Long tail of dust

    (c) Two asteroids orbiting each other

    (d) Two planets orbiting each other

    Mukundpura CM2

    • The meteorite named Mukundpura CM2 was classified to be a carbonaceous chondrite.
    • This is a type of stony meteorite, considered the most primitive meteorite and a remnant of the first solid bodies to accrete in the solar system.
    • The composition of carbonaceous chondrites is also similar to the Sun.
    • Chondrites are silicate-droplet-bearing meteorites, and this Mukundpura chondrite is the fifth carbonaceous meteorite known to fall in India.

    Why it is important to study meteorites?

    • Meteorites are representative of asteroids.
    • Asteroids are the remnant debris of the inner solar system formation process and thus offer the formation history or the building blocks of the planets.
    • Therefore, by studying meteorites in the laboratory and asteroids by exploration and sample return mission we try to reconstruct the activity of early solar system events.
    • Also, asteroids are often rich in volatiles and other minerals and can be exploited for future planetary exploration.

    Do you know?

    Meteorites are broadly classified into three groups – stony (silicate-rich), iron (Fe–Ni alloy), and stony-iron (mixed silicate–iron alloy).

    Details of its study

    • The study revealed that Mukundpura CM2 had experienced varying degrees of alteration during the impact.
    • Some minerals like forsterite and FeO olivine, calcium aluminium rich inclusion (CAI) minerals escaped alteration.
    • Few magnetites, sulphides and calcites were also found.
    • Detailed spectroscopic studies revealed that the meteorite had very high (about 90%) phyllosilicate minerals comprising both magnesium and iron.
    • Further X-ray studies showed it also had aluminium complexes.

    Relevance to asteroids

    • The results of the Mukundpura CM2 study are relevant to the surface composition of near-Earth asteroids Ryugu and Bennu.
    • In October 2020, NASA’s OSIRIS-REx mission collected samples from Bennu and is expected to return in September 2023.
    • Last month, Japan’s Hayabusa-2 mission landed on Earth with samples from Ryugu.

    Back2Basics:

  • [pib] TiHAN: India’s first Testbed for Autonomous Navigation Systems

    Union Minister of Education laid the foundation stone of ‘TiHAN-IIT Hyderabad’, India’s first Testbed for Autonomous Navigation Systems (Terrestrial and Aerial).

    Must read:

    https://www.civilsdaily.com/news/regulations-for-flying-of-drones/

    TiHAN

    • TiHAN is an acronym for Technology Innovation Hub on Autonomous Navigation and Data Acquisition Systems (UAVs, RoVs, etc.).
    • It is a multi-departmental initiative, including researchers from Electrical, Computer Science, Mechanical and Aerospace, Civil, Mathematics, and Design at IIT Hyderabad.
    • It would focus on addressing various challenges hindering the real-time adoption of unmanned autonomous vehicles for both terrestrial and aerial applications.

    Why need TiHAN?

    • One major requirement to make unmanned and connected vehicles more acceptable to the consumer society is to demonstrate its performance in real-life scenarios.
    • However, it may become dangerous. Especially in terms of safety, to directly use the operational roadway facilities as experimental test tracks for unmanned and connected vehicles.
    • In general, both UAV and UGV testing may include crashes and collisions with obstacles, resulting in damage to costly sensors and other components.
    • Hence, it is important to test new technologies developed in a safe, controlled environment before deployment.