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Comet

en.wikipedia.org/wiki/Comet

A comet is an icy small Solar System body that, when passing close to the Sun, heats up and .... Cometary nuclei are composed of an amalgamation of rock, dust , water ice, and ... However, some comet...

Meteoroid, Meteors, and Meteorites - Crystalinks

www.crystalinks.com/meteors.html

A meteoroid is a small rocky or metallic body travelling through space. ... Meteoroids moving through Earth's orbital space average about 20 km/s. ... A meteorite is a solid piece of debris, from such sources as asteroids or comets, that ... The first known modern case of a human hit by a space rock occurred on November 30, .....

What Are an Asteroid, a Meteor and a Meteorite? - Live Science

www.livescience.com/27183-asteroid-meteorite-meteor-meteoroid.html

Feb 15, 2013 ... News · Tech · Health · Planet Earth · Space · Strange News ... loosely as "space debris," or leftover fragments from the formation of the solar system (like the extra pieces that remain after constructing a build-it-yourself ... the plunge through the atmosphere and lands on ...

Meteorite Crater - The shape of the land, Forces and changes ...

www.scienceclarified.com/landforms/Faults-to-Mountains/Meteorite-Crater.html

In July 1994, pieces of the comet Shoemaker-Levy 9 slammed into thes outhern ... There are more than 160 known meteorite craters on the surface of Earth . ... The energy of the impact typically causes some rocks to melt. In simple ... Meteor: A glowing fragment of extraterrestrial material passing through Earth's atmosphere.

All About Meteorites - Armagh Planetarium

www.armaghplanet.com/html/meteorites.html

How fast do they travel through space? ... Meteorites are samples of space rock that fall on to the Earth's surface from space. ... Space debris is collectively termed meteoroids, those larger fragments that reach the ground are called meteorites. Very big .... After millions of years some of these pieces fell to Earth as meteorite...

Meteoroids vs Asteroids - Free Mars

www.freemars.org/jeff/meteor/

... light in the sky made by a fast-moving piece of rock from Space, called a meteoroid, ... higher during a meteor shower, when Earth passes through debris from a comet. ... or fragment and then slow to terminal speed before reaching 10 kilometres. .... The icy asteroid itself is usually referred to as a comet even when it is far ...

Glossary :: NASA Space Place

spaceplace.nasa.gov/glossary/

Aug 24, 2015 ... Black hole: A place in space where matter and light cannot escape if they ... Comet: An icy rock that lets off gas and dust, which may form tails ... Pluto is the best known of the dwarf planets. ... Gas: A loose collection of atoms moving around each other. ... Particle: A tiny amount or small piece of something.

Space Rocks 101: What You Need To Know About Russia's Meteor ...

www.popsci.com/science/article/2013-02/what-you-should-know-about-russias-meteor

Feb 15, 2013 ... What is the difference between all these space rocks? ... Comet: An icy body that orbits the sun, like an asteroid, that features a ... Meteoroid: Small rocky or metallic pieces of debris flying through space that can come from a fragment of an ... The largest known meteorite to hit the Earth is the Hoba meteorite, ...

Solar System Debris - University of Arizona

ircamera.as.arizona.edu/NatSci102/NatSci102/lectures/debris.htm

Asteroids are also called "Minor Planets"; Kuiper Belt and Oort Cloud objects outside ... they hit the Earth and survive passage through the atmosphere to hit the ground) ... the force of gravity overwhelms the chemical bonding forces in rocks. .... the fragments has a tail, while they all move along the trail of debris left ...

Glossary of Glacier Terminology - Text Version

pubs.usgs.gov/of/2004/1216/text.html

Jan 12, 2013 ... Rock glaciers have little or no visible ice at the surface. ... This occurs through a variety of processes including melting and runoff, sublimation, ... As ice in a glacier is always moving forward, a glacier's terminus advances when less ice is lost due ... Once they enter the water, the pieces are called icebergs...

More Info

Why do astronomers use light years to measure distances in space ...

www.reference.com

Astronomers use light years to measure distances in space because space is so ... An Icy Piece of Rock or Rock Fragment Moving through Space Is Known as a ...

Meteorites, Impacts, & Mass Extinction - Tulane University

www.tulane.edu

Dec 1, 2014 ... A Meteorite is a piece of rock from outer space that strikes the surface of the Earth . ... The Perseid Shower, results from passage through one of these belts every ... Most meteorites appear to be fragments of larger bodies called parent bodies. ... While the outer surface of comets appear to composed of icy ...

Comets, Asteroids, Meteorites and Impacts

www.uni.edu

Comets are quite different from planets in how they move around the solar system. ... These include the gas tail (also called the ion tail), which is made up of material that is ... This is, of course, made up of mainly dust (rocks and silicates). ..... Meteor - when an object from space enters the Earth's atmosphere and burns up.