81. Julie's Astronomy Web Page Information on stars, galaxies, planets, the Sun, nebulae, Little Green Men, telescopes, comets, meteors, asteroids, constellations and mythological tales about the zodiac signs. http://www.geocities.com/Astronomy30/

82. Guide To Space & Astronomy Physics and Astronomy. asteroids. In each case, the group is named after the largest asteroid of that particular class. Interesting asteroids. http://www.star.le.ac.uk/edu/comets/asteroids.html

Physics and Astronomy Asteroids The asteroid Gaspra : Courtesy of the Jet Propulsion Laboratories Comets Asteroids Meteorites Introduction In the early 1600's, the astronomer Johannes Kepler formulated laws which described the shape and size of the planetary orbits. However, these laws still did not describe why the planets in our solar system were found at precisely the distances from the Sun that we observe. However, in the latter half of the eighteenth century, the German astronomer Titius discovered a curious mathematical pattern: take a sequence of numbers 0, 3, 6, 12, 24, and so on, each number being twice the previous. Then add four to every number, and finally divide each by ten. The result is another series of numbers: 0.4, 0.7, 1.0, 1.6, 2.8, 5.2, and so on. This is a remarkable series, because these numbers correspond very closely with the distances of the planets from the Sun in astronomical units. Apart, that is, from the number 2.8. There was apparently a gap in between Mars and Jupiter where the series predicted there should be a planet, but where astronomers found none.

83. Sky And Telescope - The Essential Magazine Of Astronomy Featured articles about the moon, sun, and planets, along with meteors, asteroids, and comets. http://SkyandTelescope.com/observing/

Welcome to SkyandTelescope.com, where you'll find astronomy news, stargazing tips, expert advice on choosing and using telescopes, and much, much more. Your Web browser appears to be set to block cookies. SkyandTelescope.com requires a cookie file, though you may visit the site without supplying any personal information, rendering the cookie anonymous. If you believe you reached this page in error, try clicking one of the links below to access our site. Our interactive sky chart and astronomical almanac require that you specify a city and country, but no name, address, or other personal information. You may delete the cookie after your visit, but you will then have to reenter your location information next time. To learn how to configure your system to accept cookies while visiting Web sites and/or to delete them afterward, see your browser's help page. Some browsers will allow you to accept SkyandTelescope.com's cookie without having to accept cookies from other sites. If you have any questions, please send e-mail to custserv@SkyandTelescope.com

84. StarDate Online | Solar System Guide | Asteroids asteroids The name asteroid comes from a Greek word that means starlike. When seen through a telescope, an asteroid looks like a faint star The largest http://stardate.org/resources/ssguide/asteroids.html

Contact StarDate About StarDate Friends of McDonald Sign up for Sky Tips FAQs Image Gallery Solar System Guide ... Resource List Search Keywords Solar System Guide Leftovers If You Went... ... Resources FAQs about The Solar System Solar System Guide Astronomy Gift Shop 2004 StarDate Sky Almanac ... Powers of Ten Asteroids The name "asteroid" comes from a Greek word that means "starlike." When seen through a telescope, an asteroid looks like a faint star The largest known asteroid, Ceres, was discovered in 1801. It is named from the Roman goddess of agriculture Many asteroids resemble peanuts like two chunks of rock that are glued together Astronomers have discovered thousands of asteroids in our solar system, and millions more probably await discovery. Still, the mass of all the asteroids combined is less than the mass of the smallest planet, Pluto. Most asteroids lie between Mars and Jupiter, in a vast ring called the Asteroid Belt. But others inhabit different regions of the solar system. The Apollo asteroids, for example, cross or come near Earth's orbit. An Apollo asteroid may have caused the extinction of the dinosaurs when it collided with Earth 65 million years ago. Collisions with similar asteroids may have triggered additional "mass extinctions" on Earth over the last several hundred million years. Billions of years ago, when the planets were forming, many large asteroids may have inhabited the asteroid belt. Jupiter's strong gravity prevented these "planetoids" from clumping together to form another planet. Instead, over time, the asteroids crashed into one another and split apart into smaller and smaller fragments. Such collisions occur even now, leaving dust and smaller asteroids in the asteroid belt.

85. The SpaceGuard UK Portal National focus in the UK for studies into the threat posed to the Earth by collisions with asteroids and comets. http://www.spaceguarduk.com/

Welcome to the Spaceguard UK Portal LATEST NEWS Find out what the British government is doing. Latest news from Parliament (March 2004) HERE Spaceguard UK is the national focus in the UK for studies into the threat posed to the Earth by collisions with asteroids and comets, and has recently established the privately funded Spaceguard Centre at the former Powys Observatory. T he Spaceguard Centre has established a nationwide network of Regional Comet and Asteroid Information Centres (known as CAIN ) covering England, Scotland, Wales and Northern Ireland. We welcome visitors to the Spaceguard Centre . Come and see what we do, learn about Spaceguard and experience the wonders of astronomy. PerfectArc

86. Play Asteroids Online. FREE! Brought To You By Triplets And Us asteroids. Instructions If you grew up in the 80 s you shouldn t need instructions!! Controls. A, Thrust. Z or spacebar, Fire. K or Left Arrow, Rotate Left. http://www.tripletsandus.com/80s/80s_games/asteroid.htm

Home Page About Us Our Triplets The 80's ... Download Free Arcade Games Asteroids Instructions: If you grew up in the 80's you shouldn't need instructions!! Controls A Thrust Z or spacebar Fire K or Left Arrow Rotate Left L or Right Arrow Rotate Right H Hyperspace This game will take a minute to load, but it is worth it! Click anywhere in the game area to activate the keyboard controls. Then Press 'S' to start the game Sorry, you need a Web browser that supports Java to play this game. Game by Alexander Jean-Claude Bottema's Buy Your Favorite 80's Video Games Online Play More Games Back to our 80's Page DO NOT Home About US Our Triplets The 80's ... Contact Us

87. Gamegurl Includes arcade titles such as asteroids, UFO Attack, and Snake Pit. http://www.gamegurl.com

88. Play Asteroids Online. FREE! Brought To You By Triplets And Us asteroids. Instructions If you grew up in the 80 s you shouldn t need instructions!! Controls. S, Start Game. Cursor Left, Rotate Left. Cursor Right, Rotate Right. http://www.tripletsandus.com/80s/80s_games/asteroid2.htm

Home Page About Us Our Triplets The 80's ... Download Free Arcade Games Asteroids Instructions: If you grew up in the 80's you shouldn't need instructions!! Controls S Start Game Cursor Left Rotate Left Cursor Right Rotate Right Cursor Up Fire Thrusters Cursor Down Fire Reverse Thrusters Space Bar Fire Cannon H Hypersapce This game will take a minute to load, but it is worth it! Click anywhere in the game area to activate the keyboard controls. Then Press 'S' to start the game Buy Your Favorite 80's Video Games Online Play More Games Back to our 80's Page DO NOT Home About US Our Triplets The 80's ... Contact Us

89. MyStars! planetarium program generating accurate charts, with stars, planets, comets, and asteroids. Orrery views make it a useful teaching tool. shareware Win3.1/95/98/NT http://www.relativedata.com/mystars/

90. Asteroids Dynamic Site This web site provides data on numbered and multiopposition asteroids, including orbital elements, their uncertainty, proper elements, and so on. http://hamilton.dm.unipi.it/astdys/

Click here to continue if you see this page for more than few seconds

91. Davestation.com - Games Offers puzzle and arcade Flashbased games. Includes Hangman, Simon, Zapper, asteroids, Pong, and Wire. http://www.davestation.com/pages/games.htm

game (gaym) n.: an activity that people participate in his is probably the most important part of Davestation.com, and probably your favorite. Let's face it, nobody really cares about personal information or pictures of the webmaster's drawings of classic cars... But games! Oh how you people love games. I sure hope we can begin to accommodate your childish desires. few games have been added to our list, but the main focus has been shifted from games to other types of flash animations. W ire H angman ... Test Paraphernalia: Home Webmaster Community News ... About Us Downloadable s: Games Design Flash Music ... Desktop Documentaries: Calvin Deep Thoughts Tabloids Phobias ... Links

92. Erik Asphaug My research focuses on impact and tidal processes in the very early solar system, the geophysics of comets and asteroids, spacecraft exploration of nearEarth http://www.es.ucsc.edu/~asphaug/

... and other research by Erik Asphaug , a planetary scientist in the Earth Sciences Department of UC Santa Cruz. From the "help I can't take it anymore" quote of the day department: The prevailing theory among grown-up Republicans yes, they still exist seems to be that Mr. Bush is simply doing whatever it takes to win the next election. After that, he'll put the political operatives in their place, bring in the policy experts and finally get down to the business of running the country. But I think they're in denial. Everything we know suggests that Mr. Bush's people have given as little thought to running America after the election as they gave to running Iraq after the fall of Baghdad. And they will have no idea what to do when things fall apart. From Paul Krugman, New York Times, Dec 3 2003 OK, back to (or away from) reality. Are you looking for directions to Santa Cruz and the UCSC Earth Sciences Department? Look no further than HERE My research focuses on impact and tidal processes in the very early solar system, the geophysics of comets and asteroids, spacecraft exploration of near-Earth planetesimals, and the physics of planetary collisions. Until I get off my butt and fix things, this web site focuses on my research on asteroid collisional evolution. Santa Cruz is uniquely beautiful. Have a

93. CNN.com - Study: Asteroids Shaped Mars Canyons - Dec. 5, 2002 CNN http://cnn.com/2002/TECH/space/12/05/mars.water/index.html

CNN Europe CNN Asia Languages Spanish Portuguese German Italian Korean Arabic Japanese On CNN TV Transcripts Headline News CNN International ... Special Reports SERVICES Video E-Mail Services CNNtoGO SEARCH Web CNN.com Study: Asteroids shaped Mars canyons Martian wet seasons may not have supported microbes By Richard Stenger CNN Valles Marineris, called the Grand Canyon of Mars, dominates the planet's southern highlands. Story Tools RELATED Science magazine Mars exploration (NASA) BIG DITCH Valles Marineris is more than four times longer and deeper than the Grand Canyon. The red planet trench is 2,500 miles long and up to four miles deep. (CNN) The authors of a new study say that while enormous surges of water carved out sprawling networks of valleys on Mars eons ago, the young red planet was hardly a steamy greenhouse with long-lasting oceans, as some scientists have theorized. Researchers with NASA and the University of Colorado say the canyons most likely were formed during brief bouts of torrential rains, when asteroid and comet chunks collided with Mars and unleashed frozen water. They propose that the flurry of impacts produced periodic layers of hot debris that blanketed the surface, warming it above the freezing point of water for decades or centuries at a stretch.

94. Asteroid Impact Simulations asteroids are among the most intriguing objects in our solar system. Another source of fascination is the potential destructive power of comets and asteroids. http://www.es.ucsc.edu/~asphaug/core.html

Asteroids are among the most intriguing objects in our solar system. My personal fascination with them began with one inspired episode of Gumby (where he and Pokey explore tiny planets populated by ill-behaved children), and with Antoine de Saint-Exupery's Le Petit Prince. Only later did I recognize the roots of my endearment: asteroids are small, but not too small; large, but not so large you can get lost. Their gravity provides an "up" and "down" just like Earth, yet from many of these bodies you can easily jump off. And like clockwork miniatures, asteroids may hold the key to understanding many of the global processes on Earth and other planets Another source of fascination is the potential destructive power of comets and asteroids. As much as any geophysical force, these objects are responsible for the global disruption and evolution of biospheres, and for the long-term evolution of life in the solar system. A ~1 kilometer body impacting the Earth would unleash thousands of times more energy than the most powerful nuclear weapon ever exploded. There are perhaps one million smaller asteroids in near-Earth space whose impact, however unlikely in the short term, would be more devastating than a 30 megaton explosion.

95. NEAR-EARTH ASTEROID TRACKING An autonomous celestial observatory developed by the Jet Propulsion Laboratory and funded by NASA to study asteroids and comets. The facility is a cooperative effort between the NASA Jet Propulsion Laboratory and the United States Air Force designed to complete a comprehensive search of the sky for nearEarth asteroids and comets. http://neat.jpl.nasa.gov

NEAR-EARTH ASTEROID TRACKING SCHEDULE: NEAT observations are in progress at MSSS. NEAT observations at Palomar are scheduled to occur in the pre-new Moon periods. Optimization of the new and improved QUEST camera at Palomar continues. INFO-PRESS RELEASES LINKS INTERESTING OBJECTS BY MONTH MOVIE ... NEAT/Palomar 48" Oschin Telescope NEAT is comprised of two autonomous observing systems at Maui Space Surveillance Site, NEAT/MSSS, and at Palomar Observatory, NEAT/Palomar. At both sites the NEAT cameras use 1.2-m (48") telescopes to find Near-Earth objects (NEOs), both Near-Earth asteroids (NEAs) and comets. In April TNO LATE BREAKING IMAGES In May we discovered 1 NEA: an Apollo. DISCOVERIES THIS MONTH WITH DESIGNATIONS AND CHARACTERIZATION Designat. Disc. with NEAT/ Date Vel. (deg/day) Mag. Size in km (miles) Orbit Visual. Comment* 2004 JC Palomar 8 May orbit Apollo Amors Apollos , and Atens are the three categories of Near-Earth asteroids (NEAs). Amor asteroids approach the Earth's orbit from the outside, Apollo asteroids cross the Earth's orbit, and Aten asteroids approach the Earth's orbit from the inside. Potentially Hazardous asteroids (PHAs) are larger than ~0.2 km (0.1 mile) and approach close enough to present a potential hazard but not a current hazard.

96. StarChild: The Asteroid Belt were formed. Most of the asteroids in our solar system can be found orbiting the Sun between the orbits of Mars and Jupiter. This http://starchild.gsfc.nasa.gov/docs/StarChild/solar_system_level1/asteroids.html

Listen The Asteroid Belt So far, the largest asteroid found in the asteroid belt is as big as the state of Texas. It has been named Ceres. An asteroid is a bit of rock. It can be thought of as what was "left over" after the Sun and all the planets were formed. Most of the asteroids in our solar system can be found orbiting the Sun between the orbits of Mars and Jupiter. This area is sometimes called the "asteroid belt". Think about it this way: the asteroid belt is a big highway in a circle around the Sun. Think about the asteroids as cars on the highway. Sometimes, the asteroid cars run into one another. When this happens, the asteroids may break up into smaller asteroids. Scientists think that most asteroids are the result of collisions between larger rocky space bodies. Asteroids can be a few feet to several hundred miles wide. The belt probably contains at least 40,000 asteroids that are more than 0.5 miles across. If an asteroid is captured by the gravitational pull of a planet, the asteroid can be pulled out of the belt and go into orbit as a moon around the planet that pulled on it.

97. EYEONE - Free Online Java Games, Jeux Java Gratuits, Gratis Java Spill Java based games including Void (asteroids), Blocks (tetris), Abselute Zero (arcade), Tix, Castrol Racing, Overflow. Registration required. http://www.eyeone.com/

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98. Introduction To Asteroids asteroids. asteroids are small, rocky objects which orbit the Sun along with all the other planets. They are also commonly called http://www.mira.org/fts0/planets/098/text/txt001z.htm

Asteroids Asteroids are small, rocky objects which orbit the Sun along with all the other planets. They are also commonly called minor planets (and rarely as planetoids ) because they are considerably smaller than ordinary planets. Astronomers estimate that there are more than 100,000 asteroids in our solar system although only about 8000 have been cataloged as of mid-1997. This image of (951) Gaspra was taken by the Galileo spacecraft in October, 1991. The very first asteroid, called (1) Ceres , was discovered by accident in 1801 by Giuseppe Piazzi. While making a map of faint stars, Piazzi noticed one object whose position moved over the course of several nights. Careful mathematical analysis later revealed that this faint object orbits the Sun at an average distance of 2.77 Astronomical Units with a period of 4.6 years. Piazzi named it Ceres (pronounced SEE-reez) after the Roman goddess of agriculture. Since this first discovery, many such asteroids have been found in a similar manner by searching for faint objects which move relative to the background stars. Newly discovered asteroids are initially given a designation by date, and are only officially named and numbered (in order of discovery) after their orbital properties have been accurately determined. Nearly every conceivable human name is now associated with an asteroid, check here to see if you share your name with a minor planet!

99. Astronomy Basics Learn the basics of the solar system, galaxies, sun, comets, and asteroids. http://www.astronomybasics.com

Astronomy Basics UNIVERSE – ORIGIN Astronomy: It is built on Greek root astron = star and nomos = arrangement, order or law. Astronomy, therefore, is the study of arrangement of stars. It is the branch of Physics that studies celestial bodies and the Universe as a whole. ORIGIN OF THE UNIVERSE: The Big Bang, that gigantic explosion occurred some 15 billion years ago, is not only the beginning of our own Universe, space, matter and time, but also the generator of all mass. This mass of interstellar cloud of dust and gas (solar nebula) collapsed under its own gravity. The result is, this collapse of molecular clouds vaporized the dusts and the fireball expanded, cooled and compressed in the middle and developed into a Protostar, leaving the rest of the gas to rotate around it. This cooling effect generated the most basic elements, hydrogen and helium. In due course most of the gases orbiting the forming star flowed inwards towards the star and became part and parcel of it. However, the gases are rotating and therefore due to centrifugal force some of the gases stayed away from the forming star and formed a disc capable of building itself naturally around the forming star. This disc gives away its energy through radiation and cools off into metals, rocks and ice. The dust particles collide and generate bigger particles and this process goes on till the particle builds into the size of a small rocky boulder known as asteroids. Once the bigger of these particles become really large enough to have its own gravity, the growth zooms! Because of gravity, they absorb smaller particles in their orbit and grow substantially. This process, after millions of years got us 10 or more planets in regular habits forming the solar system.

100. Scorpio.tn.cornell.edu/ACM/ NEAREARTH ASTEROID TRACKING At both sites the NEAT cameras use 1.2-m (48 ) telescopes to find Near-Earth objects (NEOs), both Near-Earth asteroids (NEAs) and comets. http://scorpio.tn.cornell.edu/ACM/

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