A meteoroid is a small rocky or metallic body in outer space. Meteoroids are significantly smaller than asteroids, and range in size from small grains to one-meter-wide objects. Objects smaller than this are classified as micrometeoroids or space dust. Most are fragments from comets or asteroids, whereas others are collision impact debris ejected from bodies such as the Moon or Mars. When a meteoroid, comet, or asteroid enters Earth's atmosphere at a speed typically in excess of 20 km/s, aerodyn
The Jeffersonian Republicans' first newspaper. Partisan politics spurred newspaper growth in the United States from 92 in 1790 to 329 at the end of Thomas Jefferson's presidency. All but 56 were identified with a political party.
To Jefferson, westward expansion was the key to the nationâs health: He believed that a republic depended on an independent, virtuous citizenry for its survival, and that independence and virtue went hand in hand with land ownership, especially the ownership of small farms.eanwhile, more and more Northerners came to believed that the expansion of slavery impinged upon their own liberty, both as citizensâthe pro-slavery majority in Congress did not seem to represent their interestsâand as yeoman farmers.