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... on both their material and orbital properties. Simulations of atmospheric entry of small asteroids and comets which consider their fragmentation were conducted and suggest a maximum hazard of ~140 average fatalities ... the mitigation of impact threats. Simple approximations to the fragmentation behaviour of small asteroids and comets suggest there are minimum interception times for the deflection of hazardous objects below which disruption ...

... planets but are still orbiting the Sun. We have all heard of a comet's tail? Well, comets are mostly an icy core surrounded by a cloud of ice crystals and water ... to ignite the vapor, we see a trail glowing behind the comet that looks like a tail. If we captured a comet and cut it open, it would most likely be just ... big ball of dirty ice. Some water in planetary atmospheres is possibly deposited there by comets falling into or passing through their atmospheres. ---- Answer provided by Joe Rhemann Image:K2S logosmall ...

... of the British Interplanetary Society for Volume 54 54 '''Page ''' - 169-179 '''Year''' - 2001 '''Keywords''' - Comets '''JBIS Reference Code ''' - 2001.54.169 '''Number of Pages''' - 11 Abstract It is beyond debate ... life have broken out on Earth without cometary seeding? Do comets harbour microorganisms which they distribute throughout the universe? Or do comets bring to the surface of Earth nothing that we do ...

... few miles across. The coma, or fuzzy head, of a comet may be a few thousand miles across. The tail of a comet can be up to several million miles long. ---- Answer ... %20Kids/KidstoSpace.html Click here Category:Kids To Space Category:Kids To Space - ASTEROIDS, COMETS, AND METEORS

... planets formed and are about the same size. Asteroids are usually made of rock, while comets are usually made of ice and dust. Very small asteroids can be thought of as meteors, and the dust from comets' tails is what usually produces the meteors we see in our sky. ---- Answer provided by ... %20Kids/KidstoSpace.html Click here Category:Kids To Space Category:Kids To Space - ASTEROIDS, COMETS, AND METEORS

... the same as they appear from Earth. If a spacecraft comes close to a comet, the comet will appear larger and more detailed and we will get to see some of the ... %20Kids/KidstoSpace.html Click here Category:Kids To Space Category:Kids To Space - ASTEROIDS, COMETS, AND METEORS

In July 2005, a portion of the Deep Impact spacecraft actually collided with a comet—a planned collision. The rest of the spacecraft passed a few miles away from the comet's nucleus. ---- Answer provided by Alan Hale, Ph.D. & Capt. USN (Ret.) William Readdy Image ... %20Kids/KidstoSpace.html Click here Category:Kids To Space Category:Kids To Space - ASTEROIDS, COMETS, AND METEORS

... —just like we do from here on Earth. Some astronauts have reported observations of comets that were visible at the times they were in space. ---- Answer provided by Alan Hale ... %20Kids/KidstoSpace.html Click here Category:Kids To Space Category:Kids To Space - ASTEROIDS, COMETS, AND METEORS

Yes, comets orbit the Sun just as the planets and the asteroids do. ---- Answer provided by Alan ... %20Kids/KidstoSpace.html Click here Category:Kids To Space Category:Kids To Space - ASTEROIDS, COMETS, AND METEORS

... cooled and created the Moon. Since then it has been hit many, many times, by comets and asteroids, and most of that material will remain on the Moon. Sometimes the impact ...

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