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- In Depth | Asteroids – NASA Solar System Exploration
Most asteroids are irregularly shaped, though a few are nearly spherical, and they are often pitted or cratered As they revolve around the Sun in elliptical orbits, the asteroids also rotate, sometimes quite erratically, tumbling as they go
- Asteroids, Comets Meteors - NASA Solar System Exploration
Our solar system’s small bodies – asteroids, comets, and meteors – pack big surprises These chunks of rock, ice, and metal are leftovers from the formation of our solar system 4 6 billion years ago
- Planet Compare – NASA Solar System Exploration
NASA’s real-time science encyclopedia of deep space exploration Our scientists and far-ranging robots explore the wild frontiers of our solar system
- RPS 3D Viewer - NASA Solar System Exploration
Asteroids, Comets Meteors About Asteroids, Comets Meteors BY TYPE Meteors Meteorites Asteroids Comets
- In Depth | Kuiper Belt – NASA Solar System Exploration
Researchers have found that some near-Earth asteroids are actually burned-out comets, and most of them would have started out in the Kuiper Belt Many comets crash into the Sun or the planets
- Make Your Own Awesome Asteroid - NASA Solar System Exploration
Scientists predicted the existence of rubble pile asteroids that barely hold together in space They are thought to be old fragments of asteroids that gently collided with each other to make a larger asteroid (process is called accretion)
- In Depth | Our Solar System – NASA Solar System Exploration
Our solar system consists of our star, the Sun, and everything bound to it by gravity – the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune; dwarf planets such as Pluto; dozens of moons; and millions of asteroids, comets, and meteoroids
- In Depth | 21P Giacobini-Zinner – NASA Solar System Exploration
Discovery Comet Giacobini-Zinner was discovered on Dec 20, 1900 by Michel Giacobini at the Nice Observatory in France The comet was later recovered by Ernst Zinner in 1913 (October 23) Overview Comet 21P Giacobini-Zinner is a small comet with a diameter of 1 24 miles (2 kilometers) This comet takes about 6 6 years to orbit the Sun once The last time comet Giacobini-Zinner reached
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