Question 1

True or false: Kepler found most of its exoplanets by watching stars dim slightly when planets passed in front.

Accepted Answer

True. This is the transit method—Kepler measured tiny dips in starlight as planets crossed their host stars, revealing thousands of exoplanets.

Question 2

True or false: Kepler was originally designed to look for Earth-sized planets in the habitable zone of Sun-like stars.

Accepted Answer

True. Its primary mission was to determine how common Earth-like planets are, focusing on the habitable zone where liquid water could exist.

Question 3

True or false: Kepler was named after the 17th-century astronomer Johannes Kepler, who discovered the laws of planetary motion.

Accepted Answer

True. The telescope was indeed named in honor of Johannes Kepler, whose work laid the foundation for understanding planetary orbits.

Question 4

True or false: Kepler's mission ended because it ran out of fuel after only two years of operation.

Accepted Answer

False. Kepler operated for over nine years (2009–2018). It stopped due to fuel depletion, but it vastly exceeded its planned 3.5-year mission.

Question 5

True or false: After its main mission failed, Kepler continued finding planets using a new technique called K2.

Accepted Answer

False. K2 was a second mission using the crippled Kepler telescope, not a new technique. It repurposed the spacecraft by using solar pressure to stabilize it.

Question 6

True or false: Kepler discovered a planet with two suns, just like Tatooine from Star Wars.

Accepted Answer

True. Kepler-16b orbits two stars, making it a real-life circumbinary planet that inspired comparisons to the fictional Tatooine.

Question 7

True or false: Kepler could detect planets as small as Mercury by measuring their gravitational wobble on their star.

Accepted Answer

False. Kepler used the transit method, not the radial velocity (wobble) method. It could detect small planets via transits, but not gravitational wobble.

Question 8

True or false: Kepler discovered a planet that is completely covered in a deep ocean with no land at all.

Accepted Answer

False. No such ocean world has been confirmed by Kepler. Some exoplanets may be water-rich, but complete ocean coverage remains hypothetical.

Kepler Space Telescope Trivia Questions