23 January 2013, 03:57 PM ET
Scaled Composites has been aiming toward commercial spaceflight for more than a decade.
23 January 2013, 03:40 PM ET
Burt Rutan envisioned a different way of launching vehicles into space.
23 January 2013, 01:34 PM ET
The sun's atmosphere has three layers: the photosphere, the chromosphere and the corona.
21 January 2013, 06:39 PM ET
The aviation giant aims to take astronauts to the International Space Station in a capsule that is similar to Apollo spacecraft.
18 January 2013, 05:44 PM ET
Jeff Bezos, who made his fortune as the founder of Amazon also began a space company focused on bringing humans into suborbit.
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.
17 January 2013, 05:22 PM ET
Material from the solar system's creation clumped together to form our closest star.
17 January 2013, 01:00 PM ET
Bigelow Aerospace's vision is to provide expandable modules for the International Space Station.
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.
15 January 2013, 09:41 PM ET
He profoundly changed how we think about space and time.
15 January 2013, 05:27 PM ET
Astrium's project would send tourists to an altitude of 60 miles (100 km) above Earth.
15 January 2013, 03:44 PM ET
There are three theories as to how Earth's satellite could have been created.
14 January 2013, 06:57 PM ET
This site near Las Cruces, New Mexico, is being planned as a base for commercial spaceflight.
08 January 2013, 12:05 PM ET
Two theories explain the formation of Earth and other planets.
20 December 2012, 12:13 PM ET
Entrepreneur Richard Branson aims to take paying passengers into space in the next few years.
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.
14 December 2012, 05:58 PM ET
The blue giant is the fourth largest planet in the solar system.
14 December 2012, 05:55 PM ET
The blue giant is the farthest planet from the sun.
14 December 2012, 05:46 PM ET
The faraway planet has some of the most extreme and violent weather in the solar system.
14 December 2012, 05:31 PM ET
The farthest planet from the sun is an ice giant.
14 December 2012, 05:26 PM ET
The blue planet is big ball of gas and slush.
14 December 2012, 05:17 PM ET
The gas giant formed out of the dust cloud known as the solar nebula.
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.
06 December 2012, 04:02 PM ET
Viking 2 was the second NASA spacecraft to make a soft landing on Mars.
05 December 2012, 04:35 PM ET
Our first glimpse of Mars in 1964 revealed craters and a barren landscape.
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.
03 December 2012, 05:22 PM ET
Mariner 2 revealed Venus' hot temperature and high surface pressure.
30 November 2012, 12:44 PM ET
Uranus is the smallest of the gas giants in the outer solar system.
30 November 2012, 12:39 PM ET
The distance to Uranus from Earth is more than a billion miles.
30 November 2012, 12:34 PM ET
The blue color of Uranus is caused by methane.
30 November 2012, 12:25 PM ET
Uranus is the coldest planet in the solar system.