14 July 2014, 06:27 AM ET
It has been more than four decades since the first men landed on the moon on July 20, 1969. Test your memory of the moon landing with this quiz.
06 November 2013, 04:48 PM ET
How much do you know about comets?
11 October 2013, 01:19 PM ET
How much do you know about constellations?
24 April 2013, 12:45 AM ET
Test your knowledge about Hubble, which has revolutionized our understanding of the universe since its April 1990 launch.
22 April 2013, 04:58 AM ET
Find out if you're well grounding in basic facts.
05 April 2013, 06:04 PM ET
Are you a space station veteran? Take our quiz and find out.
26 March 2013, 05:13 PM ET
Are you a star at star trivia?
16 October 2012, 08:25 AM ET
How well do you know the solar system's rear planet?
16 October 2012, 07:00 AM ET
How much do you know about the far-flung ice giant?
27 September 2012, 12:18 PM ET
These cosmic conundrums will challenge your knowledge of our home galaxy.
10 August 2012, 01:40 PM ET
How well do you know the largest planet in our solar system?
24 July 2012, 03:45 PM ET
How much do you know about the many worlds being discovered beyond our solar system?
17 July 2012, 07:00 AM ET
Curiosity touched down at Mars' Gale Crater on the night of Aug. 5.
13 July 2012, 07:00 AM ET
How much do you know about our solar system's major ring bearer?
11 July 2012, 11:34 AM ET
See how much you know about the dwarf planet Pluto and its natural satellites.
10 July 2012, 07:00 AM ET
Test your knowledge of the satellites around Earth in this quiz about our planet's artificial satellites.
29 May 2012, 05:58 PM ET
Do you know your Schwarzschild radius from your Chandrasekhar limit? Find out here.
16 May 2012, 07:00 AM ET
Test your knowledge of Earth's closest star.
14 May 2012, 09:53 AM ET
Brain-teasers about the private space firm and its Dragon capsule.
02 May 2012, 08:55 AM ET
The 2nd planet from the sun is hot and cloud-shrouded. Test your Venusian knowledge.
24 April 2012, 09:00 AM ET
Test your knowledge of these leftovers from the solar system's birth.
23 April 2012, 10:56 AM ET
The closest planet to the sun is also an elusive world, and so are some of these answers.
20 April 2012, 04:52 PM ET
Find out how much you know about some of the goofiest Mars claims.
18 April 2012, 05:18 PM ET
If you know your moon facts, this quiz should be easy.
18 April 2012, 03:13 PM ET
How well do you know your shooting star facts?
10 April 2012, 12:02 PM ET
Take our quiz on the reusable space plane. How much do you know?
02 August 2011, 10:22 AM ET
Find out by taking our really easy quiz.
17 November 2010, 04:35 PM ET
Space Shuttle Countdown
17 November 2010, 04:18 PM ET
Name That Shuttle Mission
21 October 2010, 05:45 PM ET
October 4, 2007 marks the 50th anniversary of the launch of the manmade satellite. How well do you remember the past half-century in space? Take this 10-question quiz and test your knowledge of space history.
20 October 2010, 03:39 PM ET
As an any astronaut will tell you, life in space is a lot like life on Earth—with some very important differences. On Earth, for example, if you leave your fork floating in air while you grab for your spoon, it will quickly hit the floor. Other difference