1. Asteroid - Wikipedia, The Free Encyclopedia Encyclopedia article covers history, groups of asteroids, spectral types. Tables of largest and notable asteroids. http://en.wikipedia.org/wiki/Asteroid

Asteroid From Wikipedia, the free encyclopedia Jump to: navigation search It has been suggested that this article or section be merged with Minor planet Discuss For other uses, see Asteroid (disambiguation) 253 Mathilde , a C-type asteroid measuring about 50 km across. Photograph taken in 1997 by the NEAR Shoemaker probe. Asteroids , also called minor planets or planetoids , are Solar System bodies smaller than planets but larger than meteoroids (which are commonly defined as being 10 meters across or less), and that are not comets . The distinction between asteroids and comets is made on visual appearance when discovered: comets must show a perceptible coma (a fuzzy "atmosphere"), while asteroids do not. Asteroids vary greatly in size, from a few hundreds of kilometres in diameter down to rocks just tens of metres across. A few of the largest are roughly spherical and are very much like miniature planets. The vast majority, however, are much smaller and are irregularly shaped. The physical composition of asteroids is varied and in many cases poorly understood. Some are solid rocky bodies, with a greater or lesser metallic content, while others are piles of rubble held together loosely by gravity. Only one asteroid— Vesta —is visible to the naked eye, and this only in very dark skies when it is favourably positioned.

2. Asteroids Overview of current scientific knowledge of asteroids. http://www.nineplanets.org/asteroids.html

Asteroids On the first day of January 1801, Giuseppe Piazzi discovered an object which he first thought was a new comet. But after its orbit was better determined it was clear that it was not a comet but more like a small planet. Piazzi named it Ceres, after the Sicilian goddess of grain. Three other small bodies were discovered in the next few years (Pallas, Vesta, and Juno). By the end of the 19th century there were several hundred. Several hundred thousand asteroids have been discovered and given provisional designations so far. Thousands more are discovered each year. There are undoubtedly hundreds of thousands more that are too small to be seen from the Earth . There are 26 known asteroids larger than 200 km in diameter. Our census of the largest ones is now fairly complete: we probably know 99% of the asteroids larger than 100 km in diameter. Of those in the 10 to 100 km range we have cataloged about half. But we know very few of the smaller ones; there are probably considerably more than a million asteroids in the 1 km range. The total mass of all the asteroids is less than that of the Moon 11 comets and asteroids have been explored by spacecraft so far, as follows: ICE flyby of Comet Giacobini-Zinner. Multiple flyby missions to Comet Halley. Giotto (retarget) to Comet Grigg-Skellerup. Galileo flybys of asteroids Gaspra and Ida (and Ida satellite Dactyl). NEAR-Shoemaker flyby of asteroid Mathilde on the way to orbit and land on Eros. DS-1 flybys of asteroid Braille and Comet Borrelly. Stardust flyby of asteroid Annefrank and recent sample collection from Comet Wild 2. For future we can expect: Hayabusa (MUSES-C) to asteroid Itokawa, Rosetta to Comet Churyumov-Gerasmenko, Deep Impact to Comet Tempel 1, and Dawn to orbit asteroids Vesta and Ceres.

3. Asteroid Introduction asteroids are rocky and metallic objects that orbit the Sun but are too small to be considered planets. They are known as minor planets Explore the http://www.solarviews.com/eng/asteroid.htm

Contents What's New Image Index Puzzles ... Search Asteroid Introduction The future cannot be predicted, but futures can be invented. - Dennis Gabor Table of Contents Asteroid Introduction Asteroid Summary Asteroids Annefrank, Braille, Castalia, Ceres, ... Vesta Asteroid Science Asteroid Exploration Chronology Asteroid Image/Animation Gallery Meteoroids and Space Debris Other Resources Asteroid/Comet Impact Hazards NEAR Spacecraft Homepage Asteroid 3753-Earth's Companion Terrestrial Impact Craters ... Earth Crossing Asteroids Asteroids are rocky and metallic objects that orbit the Sun but are too small to be considered planets. They are known as minor planets . Asteroids range in size from Ceres, which has a diameter of about 1000 km, down to the size of pebbles. Sixteen asteroids have a diameter of 240 km or greater. They have been found inside Earth's orbit to beyond Saturn's orbit. Most, however, are contained within a main belt that exists between the orbits of Mars and Jupiter. Some have orbits that cross Earth's path and some have even hit the Earth in times past. One of the best preserved examples is Barringer Meteor Crater near Winslow, Arizona.

4. Asteroids Data from across NASA, compiled at the National Space Science Data Center. http://nssdc.gsfc.nasa.gov/planetary/planets/asteroidpage.html

@import url("/style/nasa_style.css"); @import url("/style/nssdc_style.css"); Visit the NASA Portal NSSDC Home Search: Planetary Home About Planetary Frequently Asked Questions Fact Sheets ... Contact Us Asteroids General Information Asteroid Fact Sheet Near Earth Object Fact Sheet Frequently Asked Questions - Asteroids Reference Books on Asteroids General Information on Asteroids Information on Asteroid 433 Eros Information on Asteroid 253 Mathilde Missions to Asteroids Current and Past Missions Dawn - NASA Orbiter of Asteroids Ceres and Vesta (2007) Rosetta - ESA Comet Mission, will fly by asteroids Steins and Lutetia (2004) Hayabusa (Muses-C) - ISAS (Japan) Sample Return Mission to Asteroid 25143 Itokawa (2003) Genesis - NASA Discovery Solar Wind Sample Return Mission (2001) Stardust - NASA Comet Coma Sample Return Mission, flew by asteroid AnneFrank (1999) Deep Space 1 - NASA Flyby Mission to asteroid Braille (1998) Cassini - NASA/ESA Mission to Saturn through the Asteroid Belt (1997) NEAR - NASA Near-Earth Asteroid Rendezvous with 433 Eros Galileo - NASA Mission to Jupiter via asteroids Gaspra and Ida Future Missions NEAP - Rendezvous Mission to Asteroid 4660 Nereus (20)

5. Asteroids asteroids are small bodies that are believed to be left over from the beginning of the solar system 4.6 billion years ago. They are rocky objects with round http://www.windows.ucar.edu/tour/link=/our_solar_system/asteroids.html

Asteroids Click on image for larger version( 175K GIF Galileo image of Gaspra (29 October 1991) courtesy of NASA/JPL Asteroids are small bodies that are believed to be left over from the beginning of the solar system 4.6 billion years ago. They are rocky objects with round or irregular shapes up to several hundred km across, but most are much smaller. More than 100,000 asteroids lie in a belt between Mars and Jupiter. These asteroids lie in a location in the solar system where there seems to be a jump in the spacing between the planets. Scientists think that this debris may be the remains of an early planet, which broke up early in the solar system. Several thousand of the largest asteroids in this belt have been given names. The chances of an asteroid colliding with Earth are very small! But some do come close to Earth, like Hermes (closest approach of 777,000 km). Table of Asteroids Asteroid Images Asteroid News Last modified March 7, 2003 by the Windows Team The source of this material is Windows to the Universe , at http://www.windows.ucar.edu/

6. Neave Games :: Asteroids And so, asteroids was born. It s an elegantly simple game, but beautifully gratifying. You float in space and shoot the asteroids, but the more you shoot, http://www.neave.com/games/asteroids/

NEAVE GAMES In order to play Asteroids, please make sure you have the latest Flash Player installed. Thanks a lot. Play in window Play full-screen P Q M Shift key Left arrow Right arrow Up arrow Space Let me take you back... back to a world before pixels. In those days, all people had were lines. A company called Atari had recently wowed crowds with their clever use of lines in a game called Pong , but now this line technology had advanced. It was 1979, and lines could be made to look like spaceships and big rocks and flying saucers... as long as you squinted a little. And so, Asteroids was born. It's an elegantly simple game, but beautifully gratifying. You float in space and shoot the asteroids, but the more you shoot, the more asteroids you create. And be careful: you only have one ship for each 10,000 points scored. (High scores for Asteroids are reset at midnight PST, 8am GMT.) Please note: not Other Asteroids websites: Official Asteroids Asteroids screenshots Macromedia Asteroids Java Asteroids ... Icebreaker More games from Neave... Frogger Hexxagon N-Blox Simon ... more...

7. Asteroids Applet Shoot the asteroids while avoiding collisions with them. Occasionally a flying saucer will appear and attempt to shoot you down with guided missles. http://www.brainjar.com/java/games/asteroids/

8. Asteroids asteroids are rocky and metallic objects too small to be considered planets. They are sometimes called minor planets. They range in size from Ceres, http://csep10.phys.utk.edu/astr161/lect/asteroids/asteroids.html

Asteroids Asteroids are rocky and metallic objects too small to be considered planets. They are sometimes called minor planets . They range in size from Ceres, with a diameter of about 1000 km, down to a few centimeters or less. The ajacent image shows the asteroid Gaspra, as photographed by the Galileo space probe (Ref) . The name asteroids, meaning "star-like", derives from the fact that, compared with comets, they are star-like in appearance because since they are rocky they do not emit the gases and dust that give comets their fuzzy appearance. Asteroids on a collision course with Earth are called meteoroids . If this meteoroid burns up because of frictional heating when it strikes our atmosphere, we term it a meteor (colloquially, a "shooting star"). If the meteoroid doesn't burn up completely and strikes the Earth we call it a meteorite . We shall discuss, meteoroids, meteors, and meteorites in the next section. Next Back Top Home Help

9. Asteroids, Asteroid, Asteroid Belt At SPACE.com Space.com explains asteroids, asteroid, asteroid belt, asteroid impact, asteroids and comets. http://www.space.com/asteroids/

All About Asteroids During the formation of our solar system , hundreds of thousands of particles were pulled by Jupiter’s gravity rather than being spread out through space. These minor planets, or asteroids, are the products of the protoplanetary disc – dense rings of gas surrounding a newly formed star Most asteroids orbit within an area between Jupiter and Mars known as the asteroid belt. These relatively small objects look like tiny specks of light from earth, if they are visible at all. For decades scientists tried to identify specific asteroids, but it wasn’t until 1801 when Giuseppe Piazzi identified the first asteroid: 1 Ceres. As of April, 2006, 330,795 asteroids have been named, and we are constantly finding more. The possible impact of asteroids and comets with the Earth’s surface could be catastrophic. We need only refer to the extinction of dinosaurs to illustrate this reality. Scientists have made efforts to more closely observe asteroids and detect possible threats. Beginning with the first close-up images in 1991 by the probe Galileo, we continue to make new efforts of discovery. The three most potentially dangerous groups of asteroids are Apollos, Amors, and Atens. We are also able to learn about asteroid impact from the effects they have had on other planets and their satellites To find out more about asteroids, comets, or any other magnificent part of space, click on any of the images, articles and other interactive resources below.

10. Asteroids Videogame By Atari (1979) - The International Arcade Museum And The KL The asteroids coinoperated Videogame by Atari (circa 1979), is brought to you by The International Arcade Museum and the KLOV, as part of the Internet s http://www.klov.com/A/Asteroids.html

Asteroids - Set Up The Ultimate Gameroom or Media Center - Click a category to get help from our sponsors! Manufacturer: Atari Year: Class: Wide Release Genre: Space Type: Videogame Monitor: Orientation: Horizontal Type: Vector CRT: Black and White 19-inch Electrohome G05-802/805 Conversion Class: unique Number of Simultaneous Players: 1 Maximum number of Players: 2 Gameplay: Alternating Control Panel Layout: Single Player Controls: Buttons: Rotational (left, right) Buttons: 3 Sound: Unamplified Mono (requires one-channel amp) Click here to contribute another image. View 3-D Model QuickTime (TM) View Bezel Image View Control Panel Image ... View PCB Image Description Your space craft is dangerously situated among fast moving asteroids in an asteroid belt that can destroy your ship on contact. Armed with a front mounted weapon and the ability to hyperspace, you fly through the debris, destroying each rock one piece at a time. Alien saucers visit the playfield from time to time with an eye towards destroying your ship! Know anything more about this game?

11. Asteroids: Zoom Astronomy Asteroid 253 Mathilde, a NearEarth Asteroid photographed by NASA s NEAR (Near Earth Asteroid Rendezvous) mission in June 1997. Mathilde is about 60 km in http://www.enchantedlearning.com/subjects/astronomy/asteroids/

Advertisement. EnchantedLearning.com is a user-supported site. As a bonus, site members have access to a banner-ad-free version of the site, with print-friendly pages. Click here to learn more. Join Enchanted Learning Site subscriptions last 12 months. Click here for more information on site membership. $20.00/year or other amount (directly by Credit Card $20.00/year or other amount (via PayPal $20.00/year or other amount (for sending a check by mail $20.00/year or other amount (for subscribing by school purchase order As a thank-you bonus, site members have access to a banner-ad-free version of the site, with print-friendly pages. (Already a member? Click here. Zoom Astronomy ASTEROIDS Introduction Near-Earth Asteroids (NEA) Asteroids and Dinosaurs ... Web Links Asteroids ASTEROIDS Asteroid 253 Mathilde, a Near-Earth Asteroid photographed by NASA's NEAR (Near Earth Asteroid Rendezvous) mission in June 1997. Mathilde is about 60 km in diameter and orbits in the asteroid belt between Mars and Jupiter. Asteroids are rocky or metallic objects, most of which orbit the Sun in the asteroid belt between Mars and Jupiter . A few asteroids approach the Sun more closely. None of the asteroids have atmospheres.

12. Exploring The Planets - Asteroids Offers general scientific overview with history and images by the National Air and Space Museum. http://www.nasm.si.edu/etp/asteroids/

Discovery of the Asteroids Where Are the Asteroids? Near Earth Asteroids What Do Asteroids Look Like? ... Mars Asteroids Jupiter Saturn Uranus Neptune ... Exploring The Planets

13. Asteroids And Us Or blame the oneday scare from March, 1998, when headlines warned that a beefy asteroid could zoom within 30000 kilometers of Earth or even sledgehammer http://whyfiles.org/074asteroid/

Coming soon the ultimate extinction machines? 4 NOV 1998 Credit the blasted-from-space movies Deep Impact and Armageddon. Or blame the one-day scare from March, 1998, when headlines warned that a beefy asteroid could zoom within 30,000 kilometers of Earth or even sledgehammer our tender green planet in 2028. Within a day, egg-bespattered astronomers used 1990 data to issue a revised estimate. It's safe to say that the asteroid will miss us by a good 600,000 kilometers about twice the distance of the moon. Still, the confluence of events has put The Why Files in an asteroidal frame of mind. Nobody knows the destruction that would result from a collision with one of these sub-planetary objects, but the evidence points to sudden, catastrophic and global damage. You could say it's pretty amazing that 1998 turned out to be a boom year for asteroids. Unlike planets, these misshapen agglomerations of rock and debris are not named for ancient gods. Instead they must answer to clunky handles like "1997 YF11" or "1998 ML14"). Asteroids are also far punier than planets: Ceres, the largest, is about 1,000 kilometers in diameter, but most are under a kilometer across. Most asteroids orbit between Mars and Jupiter, crashing into each other in a silent version of 3-D bumper cars that slowly grinds them to bits.

14. Asteroids Game Free online game Destroy the rocks before they destroy you! Use your triangle ship of doom! http://www.play.vg/games/4-Asteroids.html

Home GAMES: Action Adventure Board / Card Breakout / Pong ... Random Game! LINKS n' STUFF: Links Tell-A-Friend Windows Games Classic Game Shop ... Top 20 Gaming Asteroids Shooting: Space , By Paul Neave . Destroy the rocks before they destroy you! Use your triangle ship of doom! Played times today, times all-time! 14213 votes Game Instructions! Tell a friend Add to your Favorites Destroy the asteriods. Turn using the left and right keys, thrust with the up key, and fire with spacebar. Shift causes 'hyperspace' (you teleport randomly). ... x Close Instructions It may take a few seconds for the game to load! You may need to click once inside the game to activate it! Sorry, you will need the Flash Player to play Asteroids. Rate this game: 5 = Awesome! 4 = Great 3 = Average 2 = Okay 1 = Sucks If you like this game, you may also enjoy this free game download: Raptor: Call of the Shadows Don't miss checking out Gaming Top 200 TopListCity Games and see the Top 20 Gaming Sites Play.vg Partner Sites - Check 'em out! Arcade Town The Free Site MoFunZone Game Sloth ... contact me and it will be removed immediately! By using this site you agree to assume all risk; the authors/owners of this site disclaim all liability for any direct or consequential damage that results from use of this site and/or games or sites linked to herein. View this site's . For search engines: the site map / raw links

15. ::guimp Asteroids:: World's Smallest Asteroids Game Smaller than a small fingernail, the world s smallest website measures only 18 by 18 pixels yet is packed full of fun projects including pong, pacman, http://www.guimp.com/asteroids_flash.html

16. Asteroids.com: The Best Links To Asteroid Information asteroids are also called planetoids or minor planets. The word Asteroid is most commonly used in science to describe a group of relatively tiny celestial http://www.asteroids.com/

The Best Source for all things Asteroids Links to Asteroids: You've found information about the following topics: Asteroids The Asteroid Belt Asteroid Moons Asteroids are also called planetoids or minor planets. The word Asteroid is most commonly used in science to describe a group of relatively tiny celestial objects that orbit the sun. Asteroid (Greek for "star-like") is the word used most in the English literature for minor planets, which has been the term preferred by the International Astronomical Union; some other languages prefer planetoid (Greek: "planet-like"), because it more accurately describes what they are. In late August 2006, the IAU introduced the term "small solar system bodies" (SSSBs), which includes most objects thus far classified as minor planets, as well as comets. At the same time they introduced the term dwarf planet for the largest minor planets. This article deals specifically with the minor planets that orbit in the inner solar system (roughly up to the orbit of Jupiter). The asteroid belt is the region of the Solar System located roughly between the orbits of the planets Mars and Jupiter where 98.5% of the known minor planet orbits can be found Asteroids, or minor planets, are small celestial bodies composed of rock, ice, and some metal that orbit the Sun. This region is termed the main belt when contrasted with other concentrations of minor planets, since these may also be termed asteroid belts.

17. Asteroids: Deadly Impact @ Nationalgeographic.com Have you checked your topsecret e-mail at the Department of Extraterrestrial Phenomena? The director needs you to nab the culprits menacing Mother Earth. http://www.nationalgeographic.com/asteroids/

Have you checked your top-secret e-mail at the Department of Extraterrestrial Phenomena? The director needs you to nab the culprits menacing Mother Earth. Asteroids

18. StarDate Online | Solar System Guide | Asteroids Heavier materials settled in the middle of the asteroid, while lighter rock rose to the surface. The surface of Ceres consists of dark, carbonrich rock http://stardate.org/resources/ssguide/asteroids.html

Contact StarDate About StarDate Friends of McDonald Sign up for Sky Tips Keywords The Solar System Minor Bodies Asteroids At the dawn of the 19th century, a group of European astronomers known as the Celestial Police was searching for a new planet. A popular mathematical formula suggested that a planet should orbit between Mars and Jupiter . On January 1, 1801, Giuseppi Piazzi, the director of the new Palermo Observatory, discovered a star-like point of light in the constellation Taurus. When additional observations on later nights showed that the object had moved compared to the background of stars, indicating that it was close to Earth, Piazzi thought he had found the missing planet, which he named Ceres. Minor Giant: Ceres Ceres is only about a quarter of the size of our own Moon. Even so, its gravity was strong enough to form Ceres into a sphere. Heavier materials settled in the middle of the asteroid, while lighter rock rose to the surface. The surface of Ceres consists of dark, carbon-rich rock mixed with a fair amount of water. It is similar to many meteorites that fall to Earth, indicating that they came from the same region of the solar system. A mission to Ceres in the next decade will provide the first close-up look at the giant of the asteroids. But the next year, astronomers found a second object in a similar orbit, then another, and another. Instead of a planet, they had found the first of the asteroids large chunks of rock that were left over from the formation of the solar system. Ceres is the largest, with a diameter of around 600 miles (1,000 km).

19. Multiplayer Asteroids Game By Chris On Nonoba - Nonoba.com Multiplayer asteroids is a small space shooter where you are able to show your friends who s the boss! New in this version is the ability to create games! http://www.nonoba.com/chris/multiplayer-asteroids

Games Forum Developers newest games ... random game Welcome, please Sign in or Sign up! Sign in Username Password Remember me Forgot your password? close Lobby for Multiplayer Asteroids developed by Chris Why is this game inappropriate? Please describe why you think this game is inappropriate Send report Cancel Why is it a favorite of yours? Please describe why you're adding this to your favorites. It'll be publicly shown on your profile, and it's nice feedback Add to favorites Cancel Register now to be able to get achievements. Gaining achievements is a way to show off your skills in the game. Compete with other players to get them first! Registration is free and easy. Chris online here Multiplayer Asteroids Use the arrow keys to steer the spacecraft. Use space to shoot and ctrl / command to activate a power up And even more impor... read more Description Multiplayer aster... more info Send game to a friend Recommend this game to one or more of your friends Recipients seperate e-mails with comma Your name Your email Message to friend(s) Cancel Sent Your recommendation has been sent Close Rated rated times , You: times played Sign up be cool Send to friend created users Embed this game Download flash file for your site How to play Use the arrow keys to steer the spacecraft.

20. AtariAge - Atari 2600 - Asteroids (Atari) asteroids Picture label. Game Profile Manual Scan icon 2600 asteroids was the first game to use bankswitching that doubled its ROM space. http://www.atariage.com/software_page.html?SoftwareLabelID=1007

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