What is Celestial Navigation?
We've been dreaming of the stars for longer than we can remember, staring up at the twinkling lights that fill the night sky and wondering what they are. We've even written songs about them. Centuries ago, before the advent of GPS, explorers and adventurers relied on celestial navigation to help them map a path to their destination. What is celestial navigation, how does it work and when was it relied upon?
Curiosity Has Landed!
Early this morning at 5:32 UTC, NASA's Curiosity rover has successfully landed on Mars, only one minute later than scheduled. The spectacular landing went without a hitch. "The Seven Minutes of Terror has turned into the Seven Minutes of Triumph," said NASA Associate Administrator for Science John Grunsfeld.
How Planets in Alien Star Systems Stack Up [Infographic]
The following infographic is a comparison of three alien star systems with our own solar system. It shows the distance at which all the known planets orbit around their stars. As of August 10, 2011, 573 extra-solar planets have been identified, but so far the three systems illustrated below are the record holders for having the most planets.
Possibilities for Life on Mars
An article was recently published by Scientific American, a very reputable science magazine, stating that evidence was found that life existed on Mars and was brought to Earth on a meteorite. The meteorite in question is called "Allan Hills 84001". It was blasted from Mars by a huge meteorite impact 16 million years ago and crashed on Earth 13,000 years ago.