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paul allen
18 January 2013, 12:59 PM ET
Microsoft co-founder Paul Allen has provided funds for private spaceflight ventures, including Scaled Composites and Stratolaunch Systems.
The Sun: Our Perfectly Average Middle Aged Star
17 January 2013, 05:22 PM ET
Material from the solar system's creation clumped together to form our closest star.
Bigelow Alpha Station
17 January 2013, 01:00 PM ET
Bigelow Aerospace's vision is to provide expandable modules for the International Space Station.
The shuttle Columbia lifts off on the first space shuttle mission ever, STS-1, on April 12, 1981.
16 January 2013, 08:50 AM ET
Columbia was the first space shuttle to reach orbit, in 1981. It flew 28 times before disaster struck in 2003.
Famed physicist Albert Einstein at the blackboard.
15 January 2013, 09:41 PM ET
He profoundly changed how we think about space and time.
Business-Jet Sized Spaceplane To Fly 62+ Miles High | Video
15 January 2013, 05:27 PM ET
Astrium's project would send tourists to an altitude of 60 miles (100 km) above Earth.
This artist's illustration depicts a giant impact between the early Earth and a Mars-size object, a cataclysmic collision thought to have created the moon about 4.5 billion years ago.
15 January 2013, 03:44 PM ET
There are three theories as to how Earth's satellite could have been created.
Spaceport America: First Looks at a New Space Terminal
14 January 2013, 06:57 PM ET
This site near Las Cruces, New Mexico, is being planned as a base for commercial spaceflight.
Artist's conception of our solar system's solar nebula, the cloud of gas and dust from which the planets formed.
08 January 2013, 12:05 PM ET
Two theories explain the formation of Earth and other planets.
Sir Richard Branson and LauncherOne Model
20 December 2012, 11:58 AM ET
Richard Branson, through his company Virgin Galactic, plans to offer flights into space for paying customers by 2015.
Uranus And Neptune: The Mysterious Outer Giants
14 December 2012, 05:58 PM ET
The blue giant is the fourth largest planet in the solar system.
Neptune at 23:09 UT June 25, 2011
14 December 2012, 05:55 PM ET
The blue giant is the farthest planet from the sun.
Neptune's Great Dark Spot, accompanied by white high-altitude clouds, as seen by a Voyager spacecraft.
14 December 2012, 05:46 PM ET
The faraway planet has some of the most extreme and violent weather in the solar system.
Source of Neptune's Hot Spots Found
14 December 2012, 05:31 PM ET
The farthest planet from the sun is an ice giant.
Different images emphasize the features on Neptune. By tracking features such as the Great Dark Spot and South Polar Feature, astronomers were able to refine measurements of the length of Neptune's day.
14 December 2012, 05:26 PM ET
The blue planet is big ball of gas and slush.
Comet Smacked Neptune 200 Years Ago, Data Suggests
14 December 2012, 05:17 PM ET
The gas giant formed out of the dust cloud known as the solar nebula.
Giovanni Cassini
13 December 2012, 04:50 PM ET
Astronomer Giovanni Cassini discovered four of Saturn's moons, determined the distance from Earth to Mars and made successful measurements of longitude.
11 December 2012, 01:31 PM ET
Elon Musk founded SpaceX with ambitions to explore Mars.
A model of the Viking Lander.
06 December 2012, 04:02 PM ET
Viking 2 was the second NASA spacecraft to make a soft landing on Mars.
Mariner 4 spacecraft
05 December 2012, 04:35 PM ET
Our first glimpse of Mars in 1964 revealed craters and a barren landscape.
NASA's twin Mars rovers, Spirit and Opportunity, have been on the surface of Mars for more than seven years.
04 December 2012, 05:52 PM ET
Although it eventually got stuck and stopped transmitting, the Spirit rover found evidence of water in Mars' past and paved the way for the more robust Curiosity.
mariner 2
03 December 2012, 05:22 PM ET
Mariner 2 revealed Venus' hot temperature and high surface pressure.
Uranus and Major Moons
30 November 2012, 12:44 PM ET
Uranus is the smallest of the gas giants in the outer solar system.
uranus & jupiter
30 November 2012, 12:39 PM ET
The distance to Uranus from Earth is more than a billion miles.
Bright Clouds on Uranus
30 November 2012, 12:34 PM ET
The blue color of Uranus is caused by methane.
Uranus Auroras, 2011
30 November 2012, 12:25 PM ET
Uranus is the coldest planet in the solar system.
Uranus Rings Tilted
30 November 2012, 12:21 PM ET
Uranus is one of two ice giants in the outer solar system.
Uranus’ tilt essentially has the planet orbiting the Sun on its side, the axis of its spin is nearly pointing at the Sun.
30 November 2012, 12:18 PM ET
Light elements clumped together to form the gas giants.
Herschel
30 November 2012, 12:14 PM ET
Discovered in 1781, the seventh planet was destined to cause snickers whenever someone says its name.
Chandra Spacecraft
28 November 2012, 12:41 PM ET
The Chandra X-Ray Observatory has probed the origins of dark matter and revealed much about the parts of the universe we can't see visually.
terrestrial planets
27 November 2012, 01:10 PM ET
Mercury is the smallest planet, but it is very dense.
Mercury's Orbit Diagram
27 November 2012, 12:53 PM ET
Mercury is the sun's closest planet, but it has a bizarre orbit.
 
 
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