Reference Pages
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, 03:15 PM ET
There used to be nine planets. Now there are eight. Whichever you prefer, here is a list of them in the order they appear in the solar system.
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.
07 June 2012, 10:29 AM ET
Cosmology by definition is the branch of astronomy involving the origin and evolution of the universe, from the Big Bang to the future of the cosmos.
06 June 2012, 06:23 AM ET
Astronomy is the study of the sun, moon, stars, planets and other objects and phenomena in space. It has a long, rich history.
04 June 2012, 08:02 AM ET
Carl Sagan was a scientist and educator best known for his TV series Cosmos, the Pale Blue Dot image of Earth and quotes about life and Earth.
30 May 2012, 01:08 PM ET
Cosmologist Stephen Hawking is regarded as a brilliant theoretical physicist. His work on black holes and the big bang are topics of popular books.
29 May 2012, 02:22 PM ET
Sir Isaac Newton invented calculus and explained optics. His most significant work involved forces and the development of a universal law of gravity.
22 May 2012, 08:37 PM ET
The speed of light in a vacuum is 186,282 miles per second (299,792 kilometers per second), and in theory nothing can travel faster than light.
21 May 2012, 09:03 AM ET
Johannes Kepler used mathematics to calculate the path of the planets.
16 May 2012, 05:09 PM ET
There are 13 popular constellations in the Zodiac. But these are just some of the star constellations astronomers use to divide the sky.
14 May 2012, 04:14 PM ET
Galaxies are composed of stars, dust, and dark matter, all held together by gravity. They come in a variety of shapes, sizes, and ages.