Space Missions Practice Questions
19 free Space Missions practice questions for the Static GK. Tap an option to answer — you get instant feedback, the correct answer, and a detailed explanation for every question.
Which spacecraft became the first human-made object to orbit a planet other than Earth when it reached Mars in 1971?
- A Viking 1
- B Mars 3
- C Voyager 1
- D Mariner 9
Correct answer: Mariner 9
Mariner 9 reached Mars on November 14, 1971, beating the Soviet Mars 2 and Mars 3 missions to become the first orbiter. It successfully mapped 70% of the Martian surface and discovered Valles Marineris.
The 'Hohmann Transfer Orbit' is a common maneuver used in space missions to:
- A Escape the Sun's gravity to leave the solar system entirely
- B Slow a spacecraft for a soft landing on a planetary surface
- C Hold a satellite at a constant position above a fixed point on Earth's equator
- D Transfer a satellite between two circular orbits of different altitudes
Correct answer: Transfer a satellite between two circular orbits of different altitudes
The Hohmann transfer is an elliptical orbit used to move a spacecraft between two coplanar circular orbits using the lowest possible amount of propellant. It involves two engine impulses: one to enter the transfer orbit and one to exit it.
Which space mission launched in 1977 utilized a rare alignment of the outer planets to perform a 'Grand Tour' of Jupiter, Saturn, Uranus, and Neptune?
- A Pioneer 10
- B Voyager 1
- C Voyager 2
- D Galileo
Correct answer: Voyager 2
Voyager 2 is the only spacecraft to have visited all four outer gas and ice giants. It used gravitational assists at each planet to reach the next, a trajectory possible only once every 175 years.
In 2014, the Rosetta mission made history by successfully deploying the 'Philae' lander onto the surface of which celestial body?
- A Asteroid 101955 Bennu
- B The Moon's far side
- C The Jupiter-family comet 9P/Tempel 1
- D Comet 67P/Churyumov–Gerasimenko
Correct answer: Comet 67P/Churyumov–Gerasimenko
Rosetta was a mission by the European Space Agency that performed the first soft landing on a comet nucleus. It provided unprecedented data on the composition and behavior of comets as they approach the Sun.
What was the primary objective of the 1990s mission 'Galileo'?
- A To study the Sun's poles
- B To map the surface of Venus using radar
- C To search for life on Mars
- D To orbit Jupiter and study its moons
Correct answer: To orbit Jupiter and study its moons
The Galileo spacecraft arrived at Jupiter in 1995 and spent eight years studying the giant planet. It famously discovered evidence of a liquid ocean beneath the icy crust of the moon Europa.
Which space mission holds the record for the fastest human-made object, traveling at approximately 163 kilometers per second relative to the Sun?
- A Parker Solar Probe
- B New Horizons
- C Helios 2
- D Solar and Heliospheric Observatory
Correct answer: Parker Solar Probe
The Parker Solar Probe uses repeated gravity assists from Venus to shrink its orbit around the Sun. Its high speed is a result of the Sun's immense gravitational pull as the probe passes through the solar corona.
The 'Viking' program of the mid-1970s consisted of two pairs of spacecraft destined for Mars. Each pair included:
- A An orbiter and a lander
- B A rover and a lander
- C An orbiter and a flyby probe
- D A lander and a sample return capsule
Correct answer: An orbiter and a lander
Viking 1 and 2 each featured an orbiter that mapped the surface from above and a lander that conducted biological experiments on the Martian soil. They provided the first high-resolution color images of the Martian surface.
Which moon of Saturn was the target of the Huygens probe, which landed on its surface in January 2005?
- A Enceladus
- B Rhea
- C Mimas
- D Titan
Correct answer: Titan
Huygens was part of the Cassini-Huygens mission and remains the only landing in the outer solar system. It revealed Titan to have a thick nitrogen atmosphere and liquid methane/ethane lakes.
The 'Apollo 11' mission landed in a specific region of the Moon known as the:
- A Sea of Tranquility
- B Ocean of Storms
- C Sea of Serenity
- D Taurus-Littrow Valley
Correct answer: Sea of Tranquility
The Lunar Module 'Eagle' touched down in Mare Tranquillitatis (the Sea of Tranquility) on July 20, 1969. This site was chosen because it was relatively flat and smooth, increasing the safety of the first manned landing.
What is the function of the 'Deep Space Network' (DSN) in space missions?
- A To provide communication and tracking for interplanetary missions
- B To refuel and repair spacecraft in Earth orbit
- C To detect gravitational waves from merging black holes and neutron stars
- D To shield astronauts from cosmic radiation
Correct answer: To provide communication and tracking for interplanetary missions
The DSN is a global network of large radio antennas located in California, Spain, and Australia. Their placement allows for continuous communication with spacecraft as the Earth rotates.
Which mission was the first to return samples from a comet to Earth in 2006?
- A Hayabusa
- B Stardust
- C OSIRIS-REx
- D Genesis
Correct answer: Stardust
Stardust flew through the coma of Comet Wild 2 and used an aerogel collector to capture dust particles. The sample return capsule landed in Utah, providing scientists with the first pristine samples of cometary material.
The 'Great Observatories' program by NASA included Hubble, Compton, Chandra, and which other telescope?
- A Spitzer
- B Kepler
- C TESS
- D Herschel
Correct answer: Spitzer
The Spitzer Space Telescope was the fourth of the Great Observatories, specializing in infrared light. Each of the four telescopes observed a different part of the electromagnetic spectrum (Visible, Gamma, X-ray, and Infrared).
Which spacecraft was intentionally crashed into the planet Saturn in 2017 to prevent potential contamination of its moons?
- A Galileo
- B Cassini
- C Juno
- D Pioneer 11
Correct answer: Cassini
After 13 years orbiting Saturn, the Cassini spacecraft's fuel was nearly depleted. NASA executed the 'Grand Finale' to destroy the craft in Saturn's atmosphere, protecting moons like Enceladus that might harbor life.
What unique landing system was first used by the 'Mars Science Laboratory' (Curiosity rover) to touch down in 2012?
- A Airbags
- B Retrorocket landing legs
- C Sky Crane
- D Lithobraking
Correct answer: Sky Crane
Because Curiosity was too heavy for airbags, engineers designed the Sky Crane. This rocket-powered descent stage lowered the rover onto the surface using cables before flying away to crash at a safe distance.
The New Horizons mission provided the first close-up images of Pluto in 2015. After its Pluto flyby, it went on to visit which Kuiper Belt object?
- A Eris
- B Haumea
- C Arrokoth
- D Makemake
Correct answer: Arrokoth
In 2019, New Horizons flew by Arrokoth (2014 MU69), which looks like a flattened snowman. It is the most distant and primitive object ever explored by a spacecraft.
Which space agency launched the 'Mangalyaan' mission (Mars Orbiter Mission), making it the first to reach Mars on its maiden attempt?
- A NASA
- B ESA
- C ISRO
- D JAXA
Correct answer: ISRO
The Indian Space Research Organisation (ISRO) launched MOM in 2013. India became the first Asian nation to reach Mars orbit and the first country globally to succeed on its first try.
The 'Messenger' mission was the first to orbit which planet in the solar system?
- A Venus
- B Mercury
- C Uranus
- D Neptune
Correct answer: Mercury
MESSENGER (MErcury Surface, Space ENvironment, GEochemistry, and Ranging) entered orbit around Mercury in 2011. It provided a complete map of the surface and confirmed the presence of water ice in permanently shadowed craters at the poles.
What is the primary goal of the 'Artemis' program?
- A To establish a permanent human settlement on the surface of Mars
- B To return humans to the Moon and establish a long-term presence
- C To intercept and redirect a hazardous near-Earth asteroid
- D To build a large radio telescope on the Moon's far side
Correct answer: To return humans to the Moon and establish a long-term presence
Artemis aims to land the first woman and the first person of color on the Moon. The program intends to use the Moon as a stepping stone for future crewed missions to Mars.
Which mission altered an asteroid's orbit in 2022 by deliberately crashing a spacecraft into it to test planetary defense?
- A LUCY
- B DART
- C PSYCHE
- D NEOWISE
Correct answer: DART
The Double Asteroid Redirection Test (DART) impacted the asteroid moonlet Dimorphos. The mission successfully demonstrated that a 'kinetic impactor' could alter the orbital period of an asteroid, providing a method for planetary defense.