Latest MCQs on Universe for Competitive Exams

191. What is the name of the first spacecraft to orbit Pluto?
A) New Horizons
B) Voyager 2
C) Pioneer 10
D) None
Correct Answer: D) None
Explanation: No spacecraft has orbited Pluto; New Horizons performed a flyby.

192. Which planet is known for its “diamond rain” phenomenon?
A) Neptune
B) Uranus
C) Jupiter
D) Saturn
Correct Answer: B) Uranus
Explanation: Uranus is believed to have diamond rain deep in its atmosphere.

193. Which planet in the solar system has the highest surface pressure?
A) Venus
B) Jupiter
C) Saturn
D) Neptune
Correct Answer: A) Venus
Explanation: Venus has a surface pressure about 92 times that of Earth.

194. What is the name of the first spacecraft to orbit the Sun at a distance closer than Mercury?
A) Parker Solar Probe
B) Helios 1
C) Ulysses
D) Solar and Heliospheric Observatory
Correct Answer: A) Parker Solar Probe
Explanation: Parker Solar Probe is the closest spacecraft to the Sun.

195. Which planet has the largest difference between its equatorial and polar diameters due to rapid rotation?
A) Jupiter
B) Saturn
C) Uranus
D) Neptune
Correct Answer: A) Jupiter
Explanation: Jupiter’s rapid rotation causes a significant bulge at the equator.

196. What is the name of the first artificial satellite to orbit Mars?
A) Mariner 9
B) Viking 1
C) Mars Odyssey
D) Mars Express
Correct Answer: A) Mariner 9
Explanation: Mariner 9 was the first spacecraft to orbit Mars.

197. Which planet has the most massive moon in the solar system?
A) Jupiter
B) Saturn
C) Uranus
D) Neptune
Correct Answer: A) Jupiter
Explanation: Ganymede, a moon of Jupiter, is the most massive moon.

198. What is the name of the first spacecraft to land on the surface of a comet?
A) Philae
B) Hayabusa
C) Stardust
D) Deep Impact
Correct Answer: A) Philae
Explanation: Philae landed on comet 67P/Churyumov–Gerasimenko in 2014.

199. Which planet is known for its “diamond rain” phenomenon?
A) Neptune
B) Uranus
C) Jupiter
D) Saturn
Correct Answer: B) Uranus
Explanation: Uranus is believed to have diamond rain deep in its atmosphere.

200. What is the name of the first spacecraft to orbit Jupiter?
A) Galileo
B) Voyager 1
C) Pioneer 10
D) Cassini
Correct Answer: A) Galileo
Explanation: Galileo orbited Jupiter from 1995 to 2003.