29 August 2012, 01:31 PM ET
The Apollo 8 mission took astronauts around the moon for the first time.
28 August 2012, 03:46 PM ET
The three astronauts on board — Gus Grissom, Ed White, and Roger Chaffee — died. The tragedy changed the way NASA operates.
27 August 2012, 03:29 PM ET
A look at the 18 men who flew on manned moon landing missions.
24 August 2012, 04:15 PM ET
The final Apollo mission took the first scientist to the moon.
23 August 2012, 06:58 PM ET
The first American to orbit Earth made history twice.
23 August 2012, 06:13 PM ET
These powerful objects offer a glimpse into the origins of the universe.
23 August 2012, 12:38 PM ET
The Apollo 13 mission's "problem" tested NASA's ingenuity
21 August 2012, 06:39 PM ET
Sunita Williams, a record-setting astronaut, has a unique way of staying fit in space.
21 August 2012, 05:07 PM ET
Facts and information about the home of NASA's astronaut corps.
21 August 2012, 11:58 AM ET
NASA's twin probes are going where no one has gone before.
20 August 2012, 03:02 PM ET
Is the Cydonia rock formation a sign of life or a trick of light?
17 August 2012, 05:35 PM ET
Astronaut, scientist, physician, teacher – Mae Jemison wears many different hats.
17 August 2012, 05:33 PM ET
The sun is a big ball of hot gases.
15 August 2012, 07:04 PM ET
Heat and light from the sun make life on Earth possible.
14 August 2012, 12:30 PM ET
The constellation Taurus charges through the northern winter sky.
10 August 2012, 05:42 PM ET
The first Indian-born woman in space died when the space shuttle Columbia broke up on re-entry.
10 August 2012, 04:07 PM ET
This dim constellation was not defined until 1930.
09 August 2012, 04:22 PM ET
Rocky surfaces and molten cores are what the four inner planets of the solar system have in common
09 August 2012, 12:41 PM ET
This large constellation contains the bright star Spica and many exoplanets and deep space objects.
08 August 2012, 04:52 PM ET
Earth's star is the largest and the most massive object in the solar system. More than 1 million Earths could fit inside the sun.
08 August 2012, 11:40 AM ET
First observed by the Chinese nearly 1,000 years ago, material from this supernova remnant is moving at 3 million mph.
07 August 2012, 03:13 PM ET
Astronaut Michael Collins felt "absolutely isolated" in orbit while his Apollo 11 crewmates walked on the moon.
07 August 2012, 02:25 PM ET
This is the dimmest constellation of the Zodiac.
06 August 2012, 04:13 PM ET
JPL is the space agency's go-to center for the robotic exploration of worlds beyond Earth.
06 August 2012, 01:58 PM ET
The Scorpius constellation comprises some of the brightest stars in the sky.
03 August 2012, 05:58 PM ET
Mars formed billions of years ago along with the rest of the solar system.
03 August 2012, 04:57 PM ET
Mars is a very cold planet. Temperatures don't get much above 70 degrees F and they can get down to nearly minus 200 degrees F.
03 August 2012, 02:50 PM ET
Mars' atmosphere is too thin to support life as we know it. And it's very dusty. The red planet has the largest dust storms in the solar system.
03 August 2012, 11:13 AM ET
Mars is made of minerals, metals and other elements.
02 August 2012, 05:48 PM ET
Mars is a moving target, so giving an exact distance from Earth depends on several factors.
02 August 2012, 03:16 PM ET
Mars is the second smallest planet in the solar system. Here are Mars’ diameter, mass and other size measurements
01 August 2012, 10:58 AM ET
Many cultures have recognized this constellation as the Lion.