26 July 2012, 01:37 PM ET
Salyut 1, the first space station, paved the way for future manned orbital platforms.
25 July 2012, 03:39 PM ET
Millions of people watched as Neil Armstrong took the first steps on the moon.
25 July 2012, 02:59 PM ET
Sally Ride was the first American woman to go into space.
25 July 2012, 01:32 PM ET
One of the dragon constellation's stars used to be the North Star
24 July 2012, 06:25 PM ET
Pegasus has some interesting galaxies and deep-space objects.
24 July 2012, 02:00 PM ET
The Russians won an early victory in the space race when they launched Yuri Gagarin into orbit.
23 July 2012, 04:43 PM ET
In 1947, pilot Chuck Yeager flew faster than the speed of sound, and also created the first sonic boom.
23 July 2012, 11:44 AM ET
To get astronauts to the moon, scientists built the largest rocket ever.
20 July 2012, 05:08 PM ET
Charles Messier compiled a catalog of more than 100 fuzzy objects, known as nebulae.
20 July 2012, 01:27 PM ET
"Lucky Lindy" electrified the world and changed public opinion about air travel.
20 July 2012, 10:00 AM ET
A stealthy, supersonic spy plane from the Cold War set world speed and altitude records for manned jet aircraft.
19 July 2012, 04:46 PM ET
The Orion constellation is one of the most prominent star patterns in the sky.
19 July 2012, 01:00 PM ET
The first scheduled passenger airline service took off from St. Petersburg, Fla.
19 July 2012, 10:00 AM ET
Nazi Germany's Me 262 fighter jet influenced later generations of U.S. military aircraft as the world's first operational turbojet aircraft.
18 July 2012, 02:00 PM ET
The Wright Brothers’ first plane flight in Kitty Hawk lasted just 12 seconds in 1903, but Orville and Wilbur made history in that airplane, the Flyer
18 July 2012, 10:00 AM ET
The zeppelin Hindenburg represented the largest aircraft to ever fly before it met a fiery end in the disaster bearing its name.
17 July 2012, 01:27 PM ET
For lighter-than-air travel to get anywhere, a way to control the balloons had to be invented.
17 July 2012, 09:00 AM ET
World War I transformed aircraft into flying weapons and harnessed aviation technology to the military.
16 July 2012, 09:32 AM ET
The 1903 Wright Flyer that made history's first flight included propellers and wire controls.
16 July 2012, 09:16 AM ET
The Montgolfier brothers launched the first flight of a hot-air balloon in 1783.
11 July 2012, 12:12 PM ET
Using the Hubble Space Telescope, astronomers have discovered a fifth moon orbiting the dwarf planet.
10 July 2012, 06:43 PM ET
Heated by a nearby star, this cloud of gas and dust forms the familiar shape of an equine head.
05 July 2012, 05:33 PM ET
With a total of 67 known moons — including four large moons known as the Galilean satellites — Jupiter almost qualifies as a solar system unto itself.
05 July 2012, 04:25 PM ET
Callisto is thought to be a long dead world, with hardly any geologic activity on its surface.
03 July 2012, 03:23 PM ET
Jupiter’s fifth moon is the most volcanically active body in the solar system.
02 July 2012, 06:39 PM ET
Some comets come from this region of space beyond the planet Neptune.
02 July 2012, 03:56 PM ET
This enormous cloud of gas and dust is a star nursery.
23 June 2012, 12:51 PM ET
American astronaut Edwin "Buzz" Aldrin made history as the second man to walk on the moon in 1969, just after Neil Armstrong in the Apollo 11 mission.
14 June 2012, 01:13 PM ET
Beyond Neptune, the Kuiper Belt is a vast region of icy objects called Kupier Belt Objects (KBOs) and dwarf planets Pluto, Eris, Maumea and Makemake.
11 June 2012, 05:51 PM ET
Most asteroids orbit between Mars and Jupiter in the Main Asteriod Belt. But some space rocks stray out of the main belt and threaten Earth.
11 June 2012, 10:07 AM ET
This list of famous astronomers includes great scientists in history who mastered many fields and modern astronomers who helped popularize astronomy.
08 June 2012, 10:55 AM ET
Dutch scientist Christiaan Huygens proposed the earliest theory about the nature of light, and he proposed Saturn was a ringed planet.