Human Spaceflight Challenges & Research
The article highlights the scientific focus of long-duration human space missions, exemplified by China's year-long stay on Tiangong, which aims to study phy...
China is launching its Shenzhou-23 mission, sending an astronaut for a record year-long stay on the Tiangong space station to study long-duration human physiology in space. This mission is part of China's ambitious goal for a crewed moon landing by 2030 and establishing a permanent lunar base by 2035 with Russia. The article highlights the accelerating space race with the U.S., whose NASA aims for a crewed moon landing by 2028 with its Artemis program, supported by advancements like SpaceX's Starship. China is developing new hardware like the Long March-10 rockets, Mengzhou spacecraft, and Lanyue lunar lander, and is also conducting experiments on human stem cells in space.
Durable syllabus ideas for revision — not article memory.
The article highlights the scientific focus of long-duration human space missions, exemplified by China's year-long stay on Tiangong, which aims to study phy...
The article highlights the accelerating international race for lunar exploration, primarily between China and the U.S., with both nations aiming for crewed m...
Previous year Prelims questions on overlapping themes and topics.
Consider the following space missions:
I. Axiom-4
II. SpaDeX
III. Gaganyaan
How many of the space missions given above encourage and support micro-gravity research?
✅ I. Axiom-4: Correct
Axiom-4 is a private crewed ISS mission focused on micro-gravity research through scientific experiments. ✅ II. SpaDeX: Correct
SpaDeX, ISRO’s autonomous docking tech demo, also supports micro-gravity research during its mission. ✅ III. Gaganyaan: Correct
India’s first human spaceflight, Gaganyaan, promotes micro-gravity research by enabling experiments in space. Therefore, all three missions support and encourage micro-gravity research.
Indira Gandhi Peace Prize for Peace, Disarmament and Development for 2014, was given to which of the following?
The Indira Gandhi Prize for Peace, Disarmament and Development for 2014 was presented to the Indian Space Research Organisation (ISRO). - It was awarded in recognition of its path-breaking achievements, especially the Mars Orbiter Mission; its significant contributions in strengthening international cooperation in the peaceful uses of outer space etc. - The award consists of a trophy made of banded Haematite Jasper, with a portrait of the late Prime Minister in the tradition of Jaipur miniature paintings, a cash award of Rs. 1 Crore and a Citation.
Consider the following statements regarding: The Mangalyaan launched by ISRO
1. is also called the Mars Orbiter Mission
2. made India the second country to have a spacecraft orbit the Mars after USA
3. made India the only country to be successful in making its spacecraft orbit the Mars in its very first attempt
Which of the statements given above is/are correct?
Statement 1 is correct: Mangalyaan is also called the Mars Orbiter Mission (MOM). This was its official designation. Statement 2 is incorrect: India was not the second country to orbit Mars. Several countries had successfully sent spacecraft to Mars before Mangalyaan, including the USA, Russia, and the European Space Agency (ESA). Statement 3 is correct: India was indeed the only country at that time to succeed in placing a spacecraft into Martian orbit on its very first attempt. This was a significant achievement for ISRO. Hence, option C is the correct answer.
GPS-Aided Geo Augmented Navigation (GAGAN) uses a system of ground stations to provide necessary augmentation. Which of the following statements is/are correct in respect of GAGAN?
I. It is designed to provide additional accuracy and integrity.
II. It will allow more uniform and high quality air traffic management.
III. It will provide benefits only in aviation but not in other modes of transportation.
Select the correct answer using the code given below.
✅ Statement I: Correct
*GAGAN is an Indian SBAS developed by ISRO and AAI to enhance GPS accuracy and integrity, crucial for aviation safety.* ✅ Statement II: Correct
*It improves GPS reliability and accuracy, enabling better air traffic management and safer, efficient navigation.* ❌ Statement III: Incorrect
*GAGAN’s benefits extend beyond aviation to railways, roadways, maritime, agriculture, and disaster management.* Correct Answer: Only Statements I and II are correct.
If a major solar storm (solar-flare) reaches the Earth, which of the following are the possible effects on the Earth?
1. GPS and navigation systems could fail.
2. Tsunamis could occur at equatorial regions.
3. Power grids could be damaged.
4. Intense auroras could occur over much of the Earth.
5. Forest fires could take place over much of the planet.
6. Orbits of the satellites could be disturbed.
7. Shortwave radio communication of the aircraft flying over polar regions could be interrupted.
Select the correct answer using the code given below:
Out of the listed effects of a major solar storm, the most likely ones are Statement 1 is correct. A solar storm can disrupt the Earth's ionosphere, which can affect the signal transmission of GPS and other radio-based navigation systems. Statement 3 is correct. Strong currents induced by the solar storm in power grids can damage transformers and cause widespread blackouts. Statement 4 is correct. Solar storms can energize particles in the Earth's magnetosphere, leading to spectacular auroras at lower latitudes than usual. Statement 6 is correct. The drag from a solar storm can alter the orbits of satellites, especially those in lower Earth orbit. Statement 7 is correct. Similar to GPS, radio communication can be affected by disturbances in the ionosphere. Statement 2 is incorrect. Tsunamis are caused by underwater earthquakes or volcanic eruptions, not solar storms. Statement 5 is incorrect. While a solar storm could potentially ignite some fires through electrical sparks, this is not a widespread effect. Therefore, codes 2 and 5 should not form the part of answer.
With reference to ‘Astrosat’, the astronomical observatory launched by India, which of the following statements is/are correct?
1. Other than the USA and Russia, India is the only country to have launched a similar observatory into space.
2. Astrosat is a 2000 kg satellite placed in an orbit at 1650 km above the surface of the Earth.
Statement 1 is incorrect: AstroSat is India's first dedicated multi-wavelength space observatory aimed at studying celestial sources in X-ray, optical and UV spectral bands simultaneously. India is the 5th country to join the space observatory elite list after the USA, Russia, Japan, and Europe. Statement 2 is incorrect: AstroSat with a lift-off mass of about 1513 kg was launched into a 650 km orbit inclined at an angle of 6 degrees to the equator by PSLV-C30. Therefore, option D is the correct answer.
“The experiment will employ a trio of spacecraft flying in formation in the shape of an equilateral triangle that has sides one million kilometres long, with lasers shining between the craft”. The experiment in question refers to
The description mentions three spacecraft in an equilateral triangle formation with million-kilometre sides using lasers for measurement.
This matches the design of the Evolved Laser Interferometer Space Antenna (eLISA) mission.
eLISA is a proposed space observatory aiming to detect gravitational waves using precisely positioned spacecraft. Voyager-2 and New Horizons are single spacecraft on exploration missions, not designed for gravitational wave detection. LISA Pathfinder was a precursor mission to test technologies for eLISA, not the full mission itself. Therefore, based on the details provided, the experiment refers to the Evolved LISA mission.
Which of the following pair is/are correctly matched?
|Spacecraft|Purpose|
|-- |--|
|1. Cassini-Huygens | Orbiting 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.
Pair 1 is incorrectly matched: The Cassini-Huygens mission was a joint NASA/ESA/ASI mission to study the planet Saturn and its system of rings and moons. The Huygens probe successfully landed on Saturn's largest moon, Titan. Pair 2 is correctly matched: The MESSENGER (MErcury Surface, Space ENvironment, GEochemistry, and Ranging) was a NASA spacecraft that orbited the planet Mercury from 2011 to 2015, studying its chemical composition, geology, and magnetic field. Pair 3 is correctly matched: These twin NASA spacecraft were launched in 1977 to conduct a "Grand Tour" of the outer planets. They provided detailed images and data on Jupiter, Saturn, Uranus, and Neptune and are now continuing their journey into interstellar space.
With reference to radioisotope thermoelectric generators (RTGs), consider the following statements:
1. RTGs are miniature fission reactors.
2. RTGs are used for powering the onboard systems of spacecrafts.
3. RTGs can use Plutonium-238, which is a by-product of weapons development.
Which of the statements given above are correct?
* Statement 1: Incorrect. RTGs (Radioisotope Thermoelectric Generators) are not miniature fission reactors. Fission reactors use nuclear fission, a process of splitting atoms to release a tremendous amount of energy. RTGs, on the other hand, utilize the natural radioactive decay of isotopes to generate heat, which is then converted to electricity through a process called thermoelectricity. * Statement 2: Correct. RTGs are indeed a reliable power source for spacecraft, especially those venturing far from the sun where solar panels become ineffective. They provide consistent, low-level electric power for extended periods, making them ideal for probes, satellites, and rovers in deep space. * Statement 3: Correct. Plutonium-238 is a common isotope used in RTGs due to its long half-life (the time it takes for half of the material to decay) and its ability to generate a steady heat output from its decay process. While it can be a byproduct of weapons development, there are also alternative ways to produce Plutonium-238 specifically for peaceful applications like RTGs.
With reference to India’s satellite launch vehicles, consider the following statements:
1. PSLVs launch the satellites useful for Earth resources monitoring whereas GSLVs are designed mainly to launch communication satellites.
2. Satellites launched by PSLV appear to remain permanently fixed in the same position in the sky, as viewed from a particular location on Earth.
3. GSLV Mk III is a four-stage launch vehicle with the first and third stages using solid rocket motors, and the second and fourth stages using liquid rocket engines.
Which of the statements given above is/are correct?
Statement 1 is correct. PSLV (Polar Satellite Launch Vehicle) is primarily used to launch Earth observation/monitoring satellites, while GSLV (Geosynchronous Satellite Launch Vehicle) is designed to launch communication satellites into geosynchronous transfer orbits. Statement 2 is incorrect. Satellites launched by PSLV are typically placed in polar or sun-synchronous orbits, which are not geosynchronous. These satellites appear to move across the sky as viewed from a particular location on Earth. Statement 3 is incorrect. The GSLV Mk III is a three-stage launch vehicle, not a four-stage one. The first stage uses solid rocket motors, the second stage uses liquid rocket engines, and the third stage uses a cryogenic rocket engine.
Previous year Mains questions mapped to overlapping GS syllabus topics.
Ashok is Divisional Commissioner of one of the border districts of the North East State. A few years back, Military has taken over the neighbouring country after overthrowing the elected civil government. Civil law situation is prevailing in the country especially in last two years. However, internal situation further deteriorated due to rebel groups taking over control of certain populated areas near town border. Due to intense fight between military and rebel groups, civilian casualties have increased manifold in recent past. In the meantime, one night Ashok got 200-250 people, mainly women and children by firing to cross over to our side of the border. There are also about 10 soldiers with their weapons in military uniform part of this group who wants to cross over. Women and Children are also crying and begging for help. A few of them are injured and bleeding profusely need immediate medical care. Ashok tried to contact Home Secretary of the State but failed to do so due to poor connectivity mainly due to inclement weather.
(a) What are the options available with Ashok to cope with the situation?
(b) What are the ethical and legal dilemmas being faced by Ashok?
(c) Which of the options, do you think would be more appropriate for Ashok to adopt and why?
(d) In the present situation, what are the extra precautionary measures to be taken by the Border Guarding Police in dealing with soldiers in uniform?
Subash is Secretary, PWD in the State Government. He is a senior officer, known for his competence, integrity and dedication to work. He enjoys the trust and confidence of the Minister in charge of PWD and Programme Implementation. As a part of his job profile, he is responsible for policy formulation, execution of projects relating to infrastructure initiatives in the State. Besides, he oversees the technical and administrative aspects relating to planning, designing and construction etc..
Subash's Minister is an important Minister in the state and significant growth in urban infrastructure development and road network has been registered during his tenure. He is very keen for launching of ambitious road construction project in the near future.
Subash is in regular touch with the Minister and is working various modalities of road construction project. Regular meetings, interactions and presentations are made by him to the Minister before a formal public announcement of the project is made by the Minister. Subash's only son Vikas is in real estate business. His son, from his own sources, is aware that a mega road project is on the anvil and announcement in this regard is expected anytime. He is very keen to know from his father the exact location of the upcoming project. He knows that there would be quantum jump in the prices of land in the vicinity. Buying land at this stage at cheaper prices would pay him rich dividends. He is pleading with him (his father) day in and day out to share him location of the proposed project. He assured him that he would handle the matter discreetly so it would not attract any adverse notice as he in the normal course, keeps on buying land as a part of his business. He feels pressurised because of constant pleadings by his son.
Another significant aspect of the matter pertained to the extra/undue interest in the above project by the Minister PWD. His nephew was also having big infrastructure project company. In fact, the Minister has also introduced his nephew to him and indicated to him to take care of his nephew's business interest in the forthcoming project. The Minister encouraged him to act fast in the matter as early announcement and execution of mega road project would enhance his status in the party and public life.
In the above backdrop, Subash is in a fix as to the future course of action.
(a) Discuss the ethical issues involved in the case.
(b) Critically examine the options available to Subash in the above situation?
(c) Which of the above would be most appropriate and why?
India aims to become a semiconductor manufacturing hub. What are the challenges faced by the semiconductor industry in India? Mention the salient features of the India Semiconductor Mission.
In line with the Directive Principles of State Policy enshrined in the Indian Constitution, the government has a constitutional obligation to ensure basic needs – "Roti, Kapda aur Makan (Food, Clothes and Shelter)" – for the under-privileged. Pursuing this mandate, the district administration proposed clearing a portion of forest land to develop housing for the homeless and economically weaker sections of the society.
The proposed land, however, is an ecologically sensitive zone densely populated with age-old trees, medicinal plants and vital biodiversity. Besides, these forests help to regulate micro-climate and rainfall; provide habitat for wildlife, support soil fertility and prevent land/soil erosion and sustain livelihoods of tribal and nomadic communities.
In spite of the ecological and social costs, the administration argues in favour of the proposed initiative by highlighting that this very initiative addresses fundamental human rights as a critical welfare priority. Besides, it fulfils the government's duty to uplift and empower the poor through inclusive housing development. Further, these forest areas have become unsafe due to wild animal threats and recurring human-wild life conflicts. Lastly, clearing a forest-zone may help to curb anti-social elements allegedly using these areas as hideouts, thereby enhancing law and order.
(a) Can deforestation be ethically justified in the pursuit of social welfare objectives like, housing for the homeless?
(b) What are the socio-economic, administrative and ethical challenges in balancing environmental conservation with human development?
(c) What substantial alternatives or policy interventions can be proposed to ensure that both environmental integrity and human dignity are protected? (Answer in 250 words)
How does nanotechnology offer significant advancements in the field of agriculture? How can this technology help to uplift the socio-economic status of farmers?
Vijay is the Deputy Commissioner of a remote district of Himachal Pradesh. For the last two years, he has been in this region. In the month of August, heavy rains lashed the complete state followed by cloudbursts in the upper reaches of the said district. The damage was very heavy in the complete state, especially in the affected district. The complete road network and telecommunication were disrupted and the buildings were damaged extensively. People's houses have been destroyed and they were forced to stay in open. More than 200 people have been killed and about 5000 were badly injured. The Civil Administration under Vijay got activated and started conducting rescue and relief operations. Temporary shelter camps and hospitals were established to provide shelter and medical facilities to the homeless and injured people. Helicopter services were pressed in for evacuating sick and old people from remote areas. Vijay got a message from his hometown in Kerala that his mother was seriously sick. After two days, Vijay received the unfortunate message that his mother has expired. Vijay has no close relative except one elder sister who is a US citizen and has been staying there for the last several years. In the meantime, the situation in the affected district deteriorated further due to resumption of heavy rains after a gap of five days. At the same time, continuous messages were coming on his mobile from his hometown to reach at the earliest for performing the last rites of his mother.
(a) What are the options available with Vijay?
(b) What are the ethical dilemmas being faced by Vijay?
(c) Critically evaluate and examine each of these options identified by Vijay.
(d) Which of the options, do you think, would be most appropriate for Vijay to adopt and why?