🚀 Telescopes & Observatories Trivia Questions & Answers

Hubble, Webb and the instruments that let us see the cosmos. Below are 21 free telescopes & observatories trivia questions with answers — part of Space trivia on BUZZ. Want a real challenge that adapts to what you know? Play the Space quiz — no signup needed to start.

21 Telescopes & Observatories trivia questions

1. Q1. China's 'Sky Eye,' the biggest single radio dish ever built, fills a valley — what's it called?

   Answer: FAST

   💡 FAST's reflector is built from 4,450 moving panels and can detect signals 13.7 billion light-years away.

2. Q2. Twin US facilities first felt a black-hole collision ripple in 2015 — name the detector.

   Answer: LIGO

   💡 The gravitational wave that tripped LIGO's alarms had been traveling toward Earth for 1.3 billion years.

3. Q3. NASA's planet-hunting telescope is named for which 17th-century astronomer of orbital fame?

   Answer: Johannes Kepler

   💡 Kepler's mission data eventually led to the confirmation of more than 2,600 exoplanets.

4. Q4. Peering through the Hooker Telescope in 1923, which astronomer proved Andromeda was its own galaxy?

   Answer: Edwin Hubble

   💡 Before that discovery, most astronomers thought the Milky Way held the entire universe.

5. Q5. Which telescope launched with a flawed mirror, then got 'space glasses' from a 1993 repair crew?

   Answer: Hubble Space Telescope

   💡 Hubble's mirror was ground to the wrong curve by about 1/50th the width of a human hair — until astronauts installed corrective optics called COSTAR.

6. Q6. Which historic Wisconsin observatory is home to the largest refracting telescope ever put to work?

   Answer: Yerkes Observatory

   💡 Dedicated in 1897, Yerkes' 40-inch lens telescope has a 64-foot tube — and more than a century later, no bigger refractor has ever been built for astronomy.

7. Q7. Which NASA telescope did its stargazing from inside a converted Boeing 747, flying above the clouds?

   Answer: SOFIA

   💡 SOFIA's 2.5-meter telescope flew at nearly 41,000 feet — above almost all the water vapor that blocks infrared light — until its final mission in September 2022.

8. Q8. Name the ESA space telescope that has charted the positions of over a billion Milky Way stars in 3D.

   Answer: Gaia

   💡 Launched in December 2013, Gaia clocked more than three trillion observations, building the most precise 3D map of the galaxy ever made.

9. Q9. ALMA's radio dishes sit atop a Chilean desert plateau at roughly what altitude above sea level?

   Answer: 5,000 meters

   💡 ALMA's 66 antennas sit on the Chajnantor Plateau in the Atacama, where thin dry air barely absorbs the millimeter-wave signals it's built to catch.

10. Q10. The James Webb Space Telescope orbits which numbered gravitational sweet spot beyond Earth?

    Answer: L2

    💡 L2 sits about 1.5 million km from Earth, letting Webb keep the Sun, Earth, and Moon all blocked behind one sunshield at once.

11. Q11. Cable failures in 2020 doomed which iconic radio dish that sat in a Puerto Rico sinkhole?

    Answer: Arecibo Observatory

    💡 Arecibo's dish played the villain's lair in the Bond film GoldenEye and inspired the movie Contact.

12. Q12. Launched in 2018, this satellite scans the whole sky for planets crossing their stars — its name?

    Answer: TESS

    💡 TESS watches over 200,000 nearby stars, hunting for the tiny brightness dips of orbiting worlds.

13. Q13. Named for a Nobel-winning astrophysicist, which X-ray observatory rode Columbia to orbit in 1999?

    Answer: Chandra X-ray Observatory

    💡 It's named for Subrahmanyan Chandrasekhar, whose work explained the physics behind dying, collapsing stars.

14. Q14. Four telescopes named Antu, Kueyen, Melipal, and Yepun share a mountaintop in whose driest desert?

    Answer: Chile

    💡 The names come from the Mapuche language — 'Yepun' means Venus, the evening star.

15. Q15. Funded in 1928 but delayed by war, this 200-inch giant saw first light atop Palomar in 1948.

    Answer: The Hale Telescope

    💡 At double the diameter of its nearest rival, it stayed the world's largest effective telescope for decades.

16. Q16. How many spacewalks did it take astronauts to fix Hubble's blurry vision in December 1993?

    Answer: Five

    💡 Over an 11-day flight aboard shuttle Endeavour, the STS-61 crew logged more than 35 hours across five spacewalks — a record for a single shuttle mission at the time.

17. Q17. The Keck Telescopes on Mauna Kea build their giant mirrors from how many hexagon segments?

    Answer: 36

    💡 Each of the 36 segments is 1.8 meters wide, and computer-controlled actuators nudge them twice a second to keep the mirror aligned to within four nanometers.

18. Q18. In October 1957, which UK telescope alone could track Sputnik's booster rocket by radar?

    Answer: Lovell Telescope

    💡 Jodrell Bank's giant dish had only just become operational when Sputnik launched — anyone's ham radio could hear the beeps, but only its radar could find the rocket.

19. Q19. In 1608, whose patent for his 'looker' was denied because the design was already an open secret?

    Answer: Hans Lippershey

    💡 The Dutch government still paid him a handsome reward — on condition he build them a two-eyed version instead.

20. Q20. Which neutrino observatory uses a cubic kilometer of frozen ice at the South Pole as its detector?

    Answer: IceCube

    💡 IceCube's 5,160 optical sensors are frozen up to 2.5 km deep, watching for the faint blue flashes neutrinos make when they hit an ice molecule.

21. Q21. After two reaction wheels failed in 2013, engineers saved Kepler by balancing it against what force?

    Answer: Sunlight pressure

    💡 Engineers used the faint push of photons on Kepler's solar panels to steady it — reborn in 2014 as the K2 'Second Light' mission.

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