Biggest Moon Of Solar System: Ganymede, Jupiter’s largest moon, is the biggest satellite in the solar system, surpassing Mercury and Pluto in size. With a diameter of about 5,270 kilometers (3,270 miles) and a mass of 1.48 × 10²³ kg, it boasts a rocky core, icy mantle, and thin oxygen atmosphere. Uniquely, it generates its own magnetic field, creating auroras and protecting against Jupiter’s radiation. Its cratered, grooved surface hints at a subsurface ocean of salty water, potentially harboring life. Discovered in 1610 by Galileo, Ganymede orbits Jupiter every 7 days, offering clues to planetary formation and habitability.

solar system question answer in english

Q1. What is the closest planet to the Sun?
Ans. Mercury
Q2. Which planet is known for its rings?
Ans. Saturn
Q3. What is the name of our galaxy?
Ans. The Milky Way
Q4. Which planet is often called the Red Planet?
Ans. Mars
Q5. What is the hottest planet in the solar system?
Ans. Venus
Q6. Which planet has the most moons?
Ans. Saturn
Q7. What type of celestial object is the Sun?
Ans. A star
Q8. What’s the only planet that supports life (as we know it)?
Ans. Earth
Q9. Which planet rotates on its side, with a tilted axis of ~98 degrees?
Ans. Uranus
Q10. What is the largest planet in our solar system?
Ans. Jupiter
Q11. How many planets are in the solar system?
Ans. Eight
Q12. What is the smallest planet in our solar system?
Ans. Mercury
Q13. Which planet has the shortest day?
Ans. Jupiter
Q14. What is the name of Mars’ largest moon?
Ans. Phobos
Q15. Which planet has a storm called the Great Red Spot?
Ans. Jupiter
Q16. What gas makes up most of Earth’s atmosphere?
Ans. Nitrogen
Q17. What is the fifth planet from the Sun?
Ans. Jupiter
Q18. Which planet is known for its extreme winds and dark blue color?
Ans. Neptune
Q19. What is the coldest planet in the solar system?
Ans. Uranus
Q20. Which planet has the nickname “Morning Star”?
Ans. Venus
Q21. What is the name of Earth’s only natural satellite?
Ans. The Moon
Q22. How long does it take the Moon to orbit Earth?
Ans. About 27.3 days
Q23. What do we call the phenomenon when the Moon blocks the Sun?
Ans. A solar eclipse
Q24. What causes the ocean tides on Earth?
Ans. The gravitational pull of the Moon
Q25. What phase is the Moon in when it appears completely dark?
Ans. New Moon
Q26. What is it called when the Moon appears fully lit?
Ans. Full Moon
Q27. What is the term for the Moon gradually becoming more visible?
Ans. Waxing
Q28. What is the term for the Moon gradually becoming less visible?
Ans. Waning
Q29. What’s the name of the first spacecraft to land humans on the Moon?
Ans. Apollo 11
Q30. Who was the first person to walk on the Moon?
Ans. Neil Armstrong
Q31. What is the closest star to Earth?
Ans. The Sun
Q32. What is the second closest star system to Earth?
Ans. Alpha Centauri
Q33. What color are the hottest stars?
Ans. Blue
Q34. What do we call a star that suddenly increases in brightness?
Ans. A nova
Q35. What is a massive star’s final stage called after a supernova?
Ans. A black hole or neutron star
Q36. What is the name of the galaxy closest to the Milky Way?
Ans. Andromeda Galaxy
Q37. What are stars primarily made of?
Ans. Hydrogen and helium
Q38. What type of star is our Sun classified as?
Ans. A yellow dwarf
Q39. What do we call a group of stars forming a pattern in the sky?
Ans. A constellation
Q40. What is the brightest star in the night sky?
Ans. Sirius
Q41. What year did humans first land on the Moon?
Ans. 1969
Q42. What was the name of the first artificial satellite launched into space?
Ans. Sputnik 1
Q43. Which country launched Sputnik 1?
Ans. The Soviet Union
Q44. Who was the first human in space?
Ans. Yuri Gagarin
Q45. Which NASA mission successfully landed the first humans on the Moon?
Ans. Apollo 11
Q46. What is the name of the space telescope launched in 1990 that orbits Earth?
Ans. Hubble Space Telescope
Q47. What is the name of the first reusable space shuttle?
Ans. Columbia
Q48. What space agency is responsible for Mars rovers like Curiosity and Perseverance?
Ans. NASA
Q49. Which billionaire founded SpaceX?
Ans. Elon Musk
Q50. What is the name of the international space station orbiting Earth?
Ans. The International Space Station (ISS)
Q51. What is a sudden burst of energy from the sun called?
Ans. A solar flare
Q52. What is the name for a small rocky body that enters Earth’s atmosphere and burns up?
Ans. A meteor
Q53. What do we call it when a meteor survives the atmosphere and hits Earth?
Ans. A meteorite
Q54. What is the glowing tail behind a comet made of?
Ans. Gas and dust pushed by solar wind
Q55. What causes an aurora (like the Northern Lights)?
Ans. Charged particles from the sun interacting with Earth’s magnetic field
Q56. What is a supernova?
Ans. A massive explosion marking the death of a star
Q57. What is the name for a region of space where gravity is so strong not even light can escape?
Ans. A black hole
Q58. What is the boundary around a black hole called?
Ans. The event horizon
Q59. What do we call a frozen ball of ice and dust that orbits the Sun?
Ans. A comet
Q60. What is a galaxy?
Ans. A massive system of stars, gas, dust, and dark matter bound together by gravity
Q61. What was the name of the first successful Mars rover?
Ans. Sojourner
Q62. What twin spacecraft launched in 1977 are now in interstellar space?
Ans. Voyager 1 and Voyager 2
Q63. What probe famously took a photo called “The Pale Blue Dot”?
Ans. Voyager 1
Q64. What was the name of the mission that landed the Perseverance rover on Mars?
Ans. Mars 2020
Q65. What spacecraft studied Saturn and its moons for over a decade?
Ans. Cassini
Q66. What NASA mission brought back samples from an asteroid in 2023?
Ans. OSIRIS-REx
Q67. What mission landed on the surface of a comet for the first time?
Ans. Rosetta (Philae lander)
Q68. What country launched the Chang’e missions to the Moon?
Ans. China
Q69. What telescope replaced Hubble as NASA’s flagship space observatory?
Ans. James Webb Space Telescope
Q70. What company launched the first private spacecraft to dock with the ISS?
Ans. SpaceX
Q71. What unit is commonly used to measure distances between stars?
Ans. Light-years
Q72. How fast does light travel in a vacuum (in km/s)?
Ans. Approximately 300,000 km/s
Q73. How long does it take light from the Sun to reach Earth?
Ans. About 8 minutes and 20 seconds
Q74. What is the average distance from Earth to the Sun?
Ans. About 93 million miles (150 million kilometers)
Q75. What is the term for the apparent shift in a star’s position due to Earth’s movement?
Ans. Parallax
Q76. What is the unit AU short for?
Ans. Astronomical Unit
Q77. How many Earth days does it take the Moon to orbit Earth?
Ans. About 27.3 days
Q78. What is a parsec roughly equal to in light-years?
Ans. About 3.26 light-years
Q79. What scale is used to classify the brightness of stars?
Ans. Magnitude scale
Q80. What does redshift in a star’s light indicate?
Ans. That the object is moving away from us
Q81. Who proposed the heliocentric model of the solar system?
Ans. Nicolaus Copernicus
Q82. Which ancient civilization built Stonehenge to align with astronomical events?
Ans. The ancient Britons
Q83. Who was the first person to use a telescope to study the stars?
Ans. Galileo Galilei
Q84. Which scientist developed the laws of planetary motion?
Ans. Johannes Kepler
Q85. What did ancient cultures often believe comets were?
Ans. Omens or signs of bad luck
Q86. What star guided the wise men in the biblical Nativity story?
Ans. The Star of Bethlehem
Q87. What is the name of the Greek god associated with the Sun?
Ans. Helios
Q88. What did the Mayans use to predict eclipses and solstices?
Ans. Their astronomical calendar system
Q89. What famous 17th-century book did Galileo write defending heliocentrism?
Ans. Dialogue Concerning the Two Chief World Systems
Q90. What ancient tool was used to measure the position of stars before telescopes?
Ans. Astrolabe
Q91. What planet rains diamonds, according to scientists?
Ans. Uranus and Neptune
Q92. Which moon in our solar system has active volcanoes?
Ans. Io (a moon of Jupiter)
Q93. What planet has a day longer than its year?
Ans. Venus
Q94. What’s the largest volcano in the solar system?
Ans. Olympus Mons on Mars
Q95. What is the coldest known place in the universe?
Ans. The Boomerang Nebula
Q96. What happens to metal in space when two pieces touch?
Ans. They fuse together (cold welding)
Q97. Can sound travel in space?
Ans. No, because space is a vacuum
Q98. Which planet has the highest mountain in the solar system?
Ans. Mars (Olympus Mons)
Q99. How long is one day on Jupiter?
Ans. About 10 Earth hours
Q100. What’s the only human-made object in interstellar space?
Ans. Voyager 1