NASA’s TESS Satellite (Transiting Exoplanet Survey Satellite) Mission – Timeline, Crew & Spacecraft

NASA believes in sharing its scientific findings openly. The information from its satellites is used by people all over the world to watch over the environment, deal with disasters, and study our climate. By being open and sharing what it learns with everyone, NASA helps make sure science is fair and benefits people everywhere. This article focuses about TESS Satellite (Transiting Exoplanet Survey Satellite) which aims on Deep Space (all-sky exoplanet transit survey), gathering key information to better understand its current role in ongoing research and spaceflight.

• TESS Satellite (Transiting Exoplanet Survey Satellite) was launched on April 18, 2018, marking a significant step forward in space exploration.  
• With a clearly defined scientific objective—namely, to Discover small exoplanets orbiting bright, nearby stars—the team is poised to gather unprecedented data and significantly advance our understanding.  
• This Astrophysics satellite (exoplanet survey - Explorers Program) served as a key test for new technologies and different ways of operating.  
• The huge size and complicated nature of the Falcon 9 amazed everyone who got a close look at it. 
• The rocket launched from Cape Canaveral, SLC-40, starting its space journey. 
• From start to finish, the mission ran for Ongoing (extended mission). 
• NASA led the planning and execution of the mission. 
• The mission was classified as Operational upon completion. 
• TESS Satellite (Transiting Exoplanet Survey Satellite) was launched with ~$200 million (excluding launch) in funding to improve autonomous systems and deepen space research capabilities. 

With Four wide-field-of-view CCD cameras, TESS Satellite (Transiting Exoplanet Survey Satellite) demonstrates the next generation of smart payloads for exploratory missions.

NASA equipped TESS Satellite (Transiting Exoplanet Survey Satellite) with Wide-field survey strategy for nearby stars, high-stability pointing to enhance system resilience and operational autonomy. This comprehensive article on NASA TESS Satellite (Transiting Exoplanet Survey Satellite) Space mission helps UPSC aspirants understand the full life cycle of a modern space mission which is relevant for GS Paper 2, GS Paper 3, GS Paper 4, and Essay.

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NASA TESS Satellite (Transiting Exoplanet Survey Satellite) Space Mission Overview 

TESS Satellite (Transiting Exoplanet Survey Satellite) – Space Mission Profile for UPSC
Target Celestial Body	Deep Space (all-sky exoplanet transit survey)
Launch Date	April 18, 2018
Objective	Discover small exoplanets orbiting bright, nearby stars
Mission Type	Astrophysics satellite (exoplanet survey - Explorers Program)
Launch Vehicle	Falcon 9
Launch Site	Cape Canaveral, SLC-40
Mission Duration	Ongoing (extended mission)
Agencies Involved	NASA
Mission Status	Operational
Estimated Cost	~$200 million (excluding launch)
Proposal Date	Early 2010s
New Instruments/Payloads	Four wide-field-of-view CCD cameras
Key Technologies Used	Wide-field survey strategy for nearby stars, high-stability pointing

Also, Checkout Sunita Williams’ Missions to the International Space Station

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TESS Satellite (Transiting Exoplanet Survey Satellite) Space Mission Global Contributions

NASA partnered with Includes international scientific collaborations and contributions to data analysis and follow-up observations (eg, from European and Australian institutions) for TESS Satellite (Transiting Exoplanet Survey Satellite), strengthening international efforts in robotic space exploration.

• Primary payload is the four CCD cameras developed by MIT Kavli Institute for Astrophysics and Space Research and MIT Lincoln Laboratory equipped TESS Satellite (Transiting Exoplanet Survey Satellite) with tools to support onboard decision-making and adaptive science operations. 
• NASA relied on Northrop Grumman (spacecraft bus), MIT Kavli Institute (instrument), SpaceX (launch) to supply major components for the spacecraft and launch systems, enhancing mission efficiency. 
• Data publicly available for exoplanet research helped unify efforts across space agencies and research institutions, advancing shared knowledge and global capabilities. 
• The global significance of TESS Satellite (Transiting Exoplanet Survey Satellite) was reflected in its role as Finding prime exoplanet candidates for follow-up by JWST/other telescopes, influencing the way nations coordinate and plan space missions. 

Global Collaboration & Strategic Impact
International Partners	Includes international scientific collaborations and contributions to data analysis and follow-up observations (eg, from European and Australian institutions)
Payload Contributions	Primary payload is the four CCD cameras developed by MIT Kavli Institute for Astrophysics and Space Research and MIT Lincoln Laboratory
Commercial Involvement	Northrop Grumman (spacecraft bus), MIT Kavli Institute (instrument), SpaceX (launch)
Data Sharing Agreements	Data publicly available for exoplanet research
Impact on Global Space Policy	Finding prime exoplanet candidates for follow-up by JWST/other telescopes

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Challenges & Risk in TESS Satellite (Transiting Exoplanet Survey Satellite) Space Mission

Despite facing technical difficulties like Managing large data volume from all-sky survey, the mission team implemented timely corrective actions that ensured TESS Satellite (Transiting Exoplanet Survey Satellite) stayed aligned with its core scientific and operational goals.

• TESS Satellite (Transiting Exoplanet Survey Satellite) encountered mission-specific risks such as Maintaining performance over extended mission, which required adaptive mission planning and real-time corrections. 
• The long-term presence or disposal of TESS Satellite (Transiting Exoplanet Survey Satellite) is summarized by its Operational in unique high Earth orbit (P/2 lunar resonant), an important aspect of mission planning. 

Operational Risks, Environmental Impact & Challenges
Risk & Mitigation Log	Maintaining performance over extended mission
Environmental & Sustainability Footprint	Operational in unique high Earth orbit (P/2 lunar resonant)
Challenges Faced	Managing large data volume from all-sky survey

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Mission Timeline of TESS Satellite (Transiting Exoplanet Survey Satellite) NASA Space Mission

• The first steps toward mission development began with its proposal on Early 2010s. 
• The NASA space mission successfully completed its landing/flyby on Not applicable, marking a key achievement in space exploration. 
• By July 2020 (End of 2-year prime mission), the spacecraft had met or exceeded its planned targets, and the mission entered its post-primary phase. 

Mission Timeline & Key Milestones
Proposal Date	Early 2010s
Critical Design Review (CDR) Date	N/A
Assembly Complete Date	N/A
Launch Date	April 18, 2018
Landing / Flyby Date	Not applicable
End of Primary Mission Date	July 2020 (End of 2-year prime mission)

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UPSC Relevance of TESS Satellite (Transiting Exoplanet Survey Satellite)

• Awareness of international space missions, especially NASA’s, is vital for success in the Prelims, given their link to science, technology, and current affairs.
• NASA’s contributions to global space policy and governance can be discussed under international relations in GS Paper 2.
• GS Paper 4 of the UPSC IAS Exam could present ethical dilemmas regarding public spending on high-risk scientific missions, using NASA’s funding strategies to evaluate responsible resource use.
• NASA Space Missions provide cross-cutting content useful in UPSC optional subjects like PSIR, Geography, and Public Administration by exemplifying governance models, global diplomacy, and spatial data infrastructure.

Also, Learn about International Space Station (ISS)

Past UPCS Mains PYQs on NASA Space Missions

Q1. Launched on 25th December 2021, the James Webb Space Telescope has been much in the news since then. What are its unique features which make it superior to its predecessor space telescopes? What are the key goals of this mission? What potential benefits does it hold for the human race? (2022, GS Paper 3) 

Q2. How does the Juno Mission of NASA help to understand the origin and evolution of the Earth? (2017, GS Paper 1)

Q3. The safe landing of the ‘Curiosity’ Rover under NASA’s space programme has sparked many possibilities. What are those and how could humankind benefit from them? (2012, GS Paper 2)

Past UPCS Prelims PYQs on NASA Space Missions

Q1 [2022]: Which one of the following statements best reflects the idea behind the “Fractional Orbital Bombardment System” often talked about in the media?

(a) A hypersonic missile is launched into space to counter the asteroid approaching the Earth and explode it in space.

(b) A spacecraft lands on another planet after making several orbital motions.

(c) A missile is put into a stable orbit around the Earth and deorbits over a target on the Earth.

(d) A spacecraft moves along a comet with the same speed and places a probe on its surface.

Answer: (c) A missile is put into a stable orbit around the Earth and deorbits over a target on the Earth.

Explanation: While this question pertains to a military concept, NASAs research into orbital mechanics and space trajectories contributes to the broader understanding of such technologies.

Q2 [2020]: “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:

(a) Voyager-2

(b) New Horizons

(c) Lisa Pathfinder

(d) Evolved LISA

Answer: (d) Evolved LISA

Explanation: Evolved LISA (Laser Interferometer Space Antenna) is a space-based gravitational wave observatory developed by ESA with contributions from NASA.

Q3 [2017]: What is the purpose of ‘evolved Laser Interferometer Space Antenna (eLISA)’ project?

(a) To detect neutrinos

(b) To detect gravitational waves

(c) To detect the effectiveness of missile defence system

(d) To study the effect of solar flares on our communication systems

Answer: (b) To detect gravitational waves

Explanation: Evolved Laser Space Interferometer Space Antenna (ELISA) project was widely in the news due to the discovery of gravitational waves by the LIGO detector and the subsequent success of the LISA pathfinder project. The European Space Agency is leading the ELISA mission. The project is initiated to detect and accurately measure gravitational waves.

Q4 [2016]: What is ‘Greased Lightning-10 (GL-10)’, recently in the news?

(a) Electric plane tested by NASA

(b) Solar-powered two-seater aircraft designed by Japan

(c) Space observatory launched by China

(d) Reusable rocket designed by ISRO

Answer: (a) Electric plane tested by NASA
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Explanation: GL-10 is a remotely piloted plane similar to an Unmanned Aerial Vehicle (UAV). It is designed and developed in such a way that it can take off like a helicopter and fly like an airplane. It is a battery-powered 10-engine with a wingspan of 3.05 meters. Eight electric motors are mounted on the wings. 2 electric motors are mounted on the tail. It weighs a maximum of 28.1 kilograms at takeoff. Due to its versatile vertical takeoff and landing ability, it produces less noise. It can be used as a UAV for small package delivery or vertical takeoff and landing, as well as long-endurance surveillance for agriculture, mapping, and other applications. Its modified scaled-up version can be used as a persons air vehicle.

Q5 [2015]: The term ‘Goldilocks Zone’ is often seen in the news in the context of:

(a) The limits of habitable zone above the surface of the Earth

(b) Regions inside the Earth where shale gas is available

(c) Search for the Earth-like planets in outer space

(d) Search for meteorites containing precious metals

Answer: (c) Search for the Earth-like planets in outer space

Explanation: The Goldilocks Zone is the livable zone around a star where the temperature is not too hot and not too cold for liquid water to exist on a planet. It is a metaphor for the childrens story Goldilocks and the Three Bears, in which a young girl selects from sets of three objects, eschewing the extremes (such as those that are enormous or small, hot or cold) and fixing on the one that is just right in the middle. The Goldilocks zone of the Sun surrounds the Earth. All of Earths water would freeze if it were found where the dwarf planet Pluto is; however, all of Earths water would boil out if it were found where Mercury is.

Also, Get to Know What was NASA's Parker Solar Probe Mission

UPSC Practice Questions on NASA Space Missions

Q1. Which organization will launch two missions named GOLD and ICON to explore the ionosphere?
1. National Aeronautics and Space Administration NASA
2. Indian Space Research Organisation ISRO
3. China National Space Administration CNSA
4. European Space Agency ESA
Answer: 1
Solution: The National Aeronautics and Space Administration NASA will launch two missions GOLD and ICON to explore the ionosphere. With these two missions, NASA will explore the ionosphere, located 96 km above Earths surface. The Global-scale Observations of the Limb and Disk GOLD mission will be launched in January 2018, while the Ionospheric Connection Explorer ICON will be launched later this year. NASA stated that both the missions were complementary to each other. GOLD will be in a geostationary orbit over the Western Hemisphere, about 35,398 km above the planets surface while the ICON will be in low-Earth orbit, at 560 km above Earth, like a close-up camera. Both the missions will also help to measure how upper atmosphere changes in response to hurricanes and geomagnetic storms.

Q2. In January 2019, NASAs planet-hunting spacecraft Tess discovered a new planet three times the size of Earth, NASA named this planet ______.
1. HD 31794b
2. HD 41479b
3. HD 21749b
4. HD 15149b
Answer: 3
Solution: In January 2019, NASAs planet-hunting spacecraft TESS discovered a new planet three times the size of Earth, NASA named this planet HD 21749b. As of August 2019, TESS has discovered around 24 exoplanets. The confirmed planet, HD 21749b, is about three times Earths size and 23 times its mass, orbits every 36 days, and has a surface temperature around 300 degrees Fahrenheit 150 degrees Celsius.

Q3. Consider the following statements:
1. Water is only found on the dark side shadowy region of the moon.
2. NASAs Artemis programme plans to send the first woman and the next man to the Moon in 2024.
3. Water on the moon can be utilized for purposes such as generating rocket fuel.
Which of the above statements is/are incorrect?
1. 1 only
2. 1 and 2
3. 1 and 3
4. 1, 2 and 3
Answer: 1
Solution: Water has been found on both sunlit and dark sides of the moon. Thus, the first statement is incorrect. The remaining two statements are correct.

Q4. Which country plans to launch worlds first mining robot named asteroid mining robot into space by November 2020?
1. USA
2. Russia
3. China
4. Japan
Answer: 3
Solution: China plans to launch the worlds first mining robot named asteroid mining robot into space by November 2020. Origin Space a private Beijing company will be launching this project. Even it is named as asteroid mining robot, it is not going to do any actual mining. This mission aimed to assess the field-test technologies aimed at the eventual mining of asteroids. The robot is planned to launch into space by a Chinese Long March series rocket. The 30-gram spacecraft, NEO-1, is likely to be launched as a secondary payload on a Chinese Long March rocket.

Q5. Consider the following statements regarding NASAs Artemis Program:
1. With the Artemis program, NASA wishes to demonstrate new technologies, capabilities and business approaches that will ultimately be needed for the future exploration of Mars.
2. It stands for Acceleration, Reconnection, Turbulence, and Electrodynamics of the Moons Interaction with the Sun.
Which of the statements given above is/are correct?
1. 1 only
2. 2 only
3. Both 1 and 2
4. Neither 1 nor 2
Answer: 3
Solution: The Artemis program: With the Artemis program, NASA wishes to demonstrate new technologies, capabilities, and business approaches that will ultimately be needed for the future exploration of the Moon. Hence statement 1 is Not correct. It stands for Acceleration, Reconnection, Turbulence, and Electrodynamics of the Moons Interaction with the Sun. Hence statement 2 is correct. The program is divided into three parts: Artemis I is most likely to be launched in 2021 and involves an uncrewed flight to test the Space Launch System SLS and Orion spacecraft. Artemis II will be the first crewed flight test and is targeted for 2023. Artemis III will land astronauts on the Moons the South Pole in 2024.

Q6. Consider the following statements.
1. ISRO has completed the development of NISAR in collaboration with NASA.
2. NISAR will produce extremely high-resolution images of the earth.
3. It will be put into orbit by a reusable rocket of SpaceX.
4. The data obtained from NISAR will be useful to estimate agricultural biomass over the full duration of the crop cycle.
Which among the above statements is/are correct?
1. 1, 2, and 3 only
2. 1 and 2 only
3. 1, 2 and 4 only
4. All are correct
Answer: 3
Solution: The Indian Space Research Organization ISRO has completed the development of radar capable of producing extremely high-resolution images for a joint earth observation satellite mission with NASA. Hence, statements 1 and 2 are correct. Name of the radar NASA-ISRO Synthetic Aperture Radar NISAR. NISAR is a collaboration between the Indian and US space agencies for a dual-frequency L and S-band SAR for earth observation. NISAR is estimated to be the worlds most expensive Earth-imaging satellite. NISAR will be put into orbit in 2022 by ISROs Geosynchronous Satellite Launch Vehicle GSLV from the Satish Dhawan Space Centre at Sriharikota near Chennai. Hence, statement 3 is not correct. The radar penetrates clouds and darkness, enabling NISAR to collect data day and night in any weather. The L and S band microwave data obtained from this satellite will be useful for a variety of applications they are: to estimate agricultural biomass over the full duration of the crop cycle, assessing soil moisture, monitoring of floods and oil slicks, coastal erosion, coastline changes, assessment of mangroves, surface deformation studies, ice sheet dynamics, etc. Hence, statement 4 is correct.

Q7. With reference to the International Space Station ISS, consider the following statements.
1. ISS is a habitable artificial satellite - the single largest man-made structure in low earth orbit.
2. It is a collaborative effort between two participating space agencies NASA National Aeronautics and Space Administration and Indian Space Research Organisation.
3. A space station is essentially a large spacecraft that remains in low-earth orbit for extended periods of time.
Which of the statements given above is/are correct?
1. 1 and 3 only
2. 2 and 3 only
3. 2 only
4. 1, 2 and 3
Answer: 1
Solution: ISS is a habitable artificial satellite - the single largest man-made structure in low earth orbit. Hence, statement 1 is correct. It is a collaborative effort between five participating space agencies: NASA National Aeronautics and Space Administration, Roscosmos Russia, JAXA Japan, ESA Europe and CSA Canada. Hence, statement 2 is not correct. A space station is essentially a large spacecraft that remains in low-earth orbit for extended periods of time. Hence, statement 3 is correct. It is like a large laboratory in space and allows astronauts to come aboard and stay for weeks or months to carry out experiments in microgravity.

Q8. In which year did ISRO launch the Mars Orbiter Mission?
1. 2012
2. 2015
3. 2014
4. 2013
Answer: 4
Solution: ISRO launched its Mars Orbiter Mission on 5th November 2013. It was the maiden interplanetary mission of ISRO. The mission got inserted into Martian orbit on 24th September 2014 in its first attempt. The mission completed its 1000 Earth days in its orbit on 19th June 2017. The mission was launched with an objective to explore and observe Mars surface features, morphology, mineralogy and the Martian atmosphere. Mars Orbiter Mission was launched with an XL variant of the PSLV, PSLV C-25. Mars Orbiter Mission made ISRO the fourth space agency to achieve this feat after Roscosmos, NASA, and the European Space Agency. India is the first Asian country to reach Martian orbit as well as the first nation in the world to achieve this in its maiden attempt. The Mars Orbiter Mission MOM is also called Mangalyaan.

Q9. The Parker Solar Probe Mission sometimes mentioned in the news recently is related to
1. Indian Space Research Organisation
2. National Aeronautics and Space Administration
3. European Space Agency
4. Japan Aerospace Exploration Agency
Answer: 2
Solution: Scientists using data from NASAs Parker Solar Probe have assembled the most complete picture yet of the inner structure and behaviour of the large cloud of space dust, known as the zodiacal cloud, that swirls throughout the solar system. They found three dust populations in the cloud: Most of the grains are being slowly pulled in toward the Sun alpha-meteoroids. The second population is generated as grains in the swirling cloud collide, creating fragments so small that they are pushed out of the solar system in all directions by pressure from sunlight beta-meteoroids. A third group, probably created when a tube of cometary debris collides with grains from the first two populations, is scattered out in a distinctive wedge shape. The sources of zodiacal clouds/interplanetary dust particles IDPs include at least: asteroid collisions, cometary activity and collisions in the inner Solar System, Kuiper belt collisions, and interstellar medium grains. NASAs historic Parker Solar Probe mission will revolutionize our understanding of the sun, where changing conditions can propagate out into the solar system, affecting Earth and other worlds. Parker Solar Probe will travel through the suns atmosphere, closer to the surface than any spacecraft before it, facing brutal heat and radiation conditions and ultimately providing humanity with the closest-ever observations of a star.

Q10. Consider the following statements with reference to the Inspiration4 mission:
1. It is a mission by NASA to take civilians into the space.
2. Inspiration4 will orbit the Earth at a level higher than the International Space Station.
Which of the statements given above is/are correct?
1. 1 only
2. 2 only
3. Both 1 and 2
4. Neither 1 nor 2
Answer: 2
Solution: Statement 1 is incorrect: SpaceX announced that Inspiration4 mission is ready for launch from NASAs Kennedy Space Centre in Florida in the USA. It is the worlds first all-civilian mission to orbit and involves taking a group of four private citizens to circle the Earth for three days, and then splashing down into the Atlantic Ocean. Statement 2 is correct: Inspiration4 will orbit the Earth at 575km, higher than the International Space Station 408km and the Hubble space telescope 547km. This will be the farthest distance travelled by a crewed mission since 2009, when astronauts last went to repair the Hubble.

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