Also Not to Be Overlooked: . . .
View PLANETS slide show
The Observatory's old webpage
»Photon« Java applet
»Jovian Satellites« Java applet
Minor Planet Center Link for Asteroid Orbits
Other Points of Interest
ASTEROID Encyclopædia Britannica Article also called minor planet, or planetoid, any of a host of small rocky bodies, about 1,000 km or less in diameter, that orbit the Sun primarily between the orbits of Mars and Jupiter. It is because of their small size and large numbers relative to the nine major planets that asteroids are also called minor planets. The two designations are frequently used interchangeably, though dynamicists, astronomers who study individual objects with dynamically interesting orbits or groups of objects with similar orbital characteristics, generally use the term minor planet, whereas those who study the physical properties of such objects usually refer to them as asteroids.
Select Asteroid to see animation: . . .
Asteroid & Comet crossing
Scroll over an astronomical item to learn of the mysteries that the heavenly body holds!!