National Aeronautics and Space Administrion

Since its inception in 1958, NASA has accomplished many great scientific and technological feats in air and space. NASA technology also has been adapted for many nonaerospace uses by the private sector. NASA remains a leading force in scientific research and in stimulating public interest in aerospace exploration, as well as science and technology in general. Perhaps more importantly, our exploration of space has taught us to view Earth, ourselves, and the universe in a new way. While the tremendous technical and scientific accomplishments of NASA demonstrate vividly that humans can achieve previously inconceivable feats, we also are humbled by the realization that Earth is just a tiny "blue marble" in the cosmos. Check out our "Thinking About NASA History" folder online as an introduction to how history can help you.

Sunday, March 11, 2012

Asteroids

Our atmosphere is our safety net  from hundreds of millions of asteroids. We have a space in our Solor System known as the asteroid belt, which is probably the reason most of us steer clear of us. This cosmic freeway is all the way between Mars and as far as Jupiter.

This asteroid belt was discovered in the 18th century, by a group of astronomers nicknamed "celestial police," as they were in search for a missing planet. The largest asteroid found within this belt has a diameter of 590 miles and orbits the sun about every four in a half year.

The asteroid rate of detection is about 5000 a month. They do not combine because of gravitational forces. Jupiter has rings of asteroids orbiting it. Jupiters orbiting asteroid belt is known as Trojans. While the whole orbital structure is known as the Lagrangian points.

In 2006, they were renamed Solar System bodies. Ceres was promoted to a dwarf planet. Asteroids have a catalog numbers, which organizes them. Probes have given us more of a first look so far. Some asteroids can easily be seen by a telescope.

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