1. Asteroids And Comets asteroids and Comets. An announcement was made on March University of Maryland. Missions to asteroids and Comets. Rosetta ESA Mission http://nssdc.gsfc.nasa.gov/planetary/planets/asteroidpage.html

Asteroids and Comets An announcement was made on March 15 of the discovery of the furthest object so far seen in our solar system. The object, named Sedna, is estimated to be 1300 to 1800 km in diameter (Pluto is 2400 km in diameter). For more information, see the NASA Press Release Asteroid Fact Sheet Comet Fact Sheet Near Earth Object Fact Sheet Images of Asteroids - from the Catalog of Spaceborne Imaging Images of Comets - from the Catalog of Spaceborne Imaging NSSDC Photo Gallery - More Images of Asteroids NSSDC Photo Gallery - More Images of Comets Reference Books on Asteroids Reference Books on Comets Frequently Asked Questions - Asteroids Frequently Asked Questions - Comets What Are Asteroids? Images and Information on the Comet SL-9 collision with Jupiter PDS Small Bodies Node: University of Maryland Missions to Asteroids and Comets Rosetta - ESA Mission to Rendezvous with Comet Churyumov-Gerasimenko (2004) Hayabusa (Muses-C) - ISAS (Japan) Sample Return Mission to Asteroid 25143 Itokawa (2003) CONTOUR - NASA Mission to fly by three comet nuclei (2002) Stardust - NASA Discovery Mission to Comet P/Wild 2 (1999) Cassini - NASA/ESA mission to Saturn through the Asteroid Belt Deep Space 1 - NASA Flyby Mission to asteroid 1992 KD (1998) Galileo - NASA Mission to Jupiter via asteroids Gaspra and Ida Genesis - NASA Discovery Solar Wind Sample Return Mission (2001) Giotto - ESA mission to Comets Halley and Grigg-Skjellerup ICE (ISEE-3) - NASA Mission to Comet Giacobini-Zinner

2. NSSDC Photo Gallery: Asteroids NSSDC Photo Gallery asteroids A collection of images of asteroids in our solar system. NSSDC Photo Gallery asteroids. http://nssdc.gsfc.nasa.gov/photo_gallery/photogallery-asteroids.html

NSSDC Photo Gallery Asteroids Gaspra Toutatis Vesta Note: If you are looking for images of NEAR's encounter with Mathilde (Asteroid 253), please visit our Mathilde flyby page. Gaspra The Galileo spacecraft was the first planetary mission to photograph an asteroid "up-close". Its flyby of Gaspra occurred on 29 October 1991 at a distance of about 16,200 km. Thumbnail Image Description Caption NASA IDs Image Size Hi-Resolution TIFF? The asteroid Gaspra. Caption P-40450-C A montage of images of Gaspra. Caption P-41383 A comparison of Gaspra with Mars' two satellites, Phobos and Deimos. Caption P-41382 The second of the two asteroids which Galileo encountered en route to Jupiter, Ida was discovered to have something different: its own satellite! Galileo's flyby of Ida (and its moon Dactyl) occurred on 28 August 1993 at a distance of about 2,400 km. Thumbnail Image Description Caption NASA IDs Image Size Hi-Resolution TIFF? The asteroid Ida. Caption P-42964 The asteroid Ida and its moon, Dactyl. Caption P-43731 Hi-res The asteroid Ida and its moon, Dactyl (in color). The asteroid Ida and its moon, Dactyl (in false color).

3. Earth-crossing Asteroids Provides a detailed research about those objects as well as information related to individual bodies. http://www.eecs.wsu.edu/~hudson/Research/Asteroids/

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4. Welcome To The PDS Small Bodies Node The Small Bodies Node (SBN) specializes in data concerning asteroids, comets and interplanetary dust. Job Annoucement SBN Manager/Research Associate. http://pdssbn.astro.umd.edu/

The Small Bodies Node Welcome to the Small Bodies Node of the NASA Planetary Data System The Planetary Data System (PDS) is a distributed archive of solar system data, prepared in a standard format for use primarily by astronomical observers and mission planners, as well as educators and students. The Small Bodies Node (SBN) specializes in data concerning asteroids, comets and interplanetary dust. Job Annoucement: SBN Manager/Research Associate Click here for details! Data Services at this Node SBN on-line data archives , with immediately downloadable catalogs and datasets for: Mission Data and Support , includes data for 18 completed, active, and upcoming small body missions such as Giotto, Galileo, NEAR, Deep Space 1, Cassini, Stardust, Rosetta, and Deep Impact. Special data collections gathered and maintained in support of these missions are also included. NEAR Archive and Data Analysis Program Asteroids (at PSI) Comets Interplanetary Dust Small Bodies Data Base The Small Bodies Data Base (SBDB), currently in development, will combine the contents of all our online catalogs with our catalog of offline data to provide direct access to both datasets and individual results. The SBDB will eventually allow users to identify objects based on observed properties and to retrieve data relevant to specific selected objects. During the first stage of implementation, each online catalog is ingested into the database and the contents made available for display based on object identification. A cross-identification utility is built into the interface, so that only a single ID need be entered to retrieve all available data relevant to the object.

5. Asteroids asteroids free game Grey Olltwit's asteroids Game. Download this program Get the free Vitalize Plugin and play asteroids, here, now, online http://www.adders.org/freeware/asteroids.html

Grey Olltwit's Freeware - Games Grey Olltwit's Asteroids Game Download this program Click here for loads more freeware from Grey Olltwit. Click here for all my programs on a CD Actual size and colours reduced for screen shot. Recommended Minimum System: PC, Windows 95/98/2000/NT4 or better with 8MB Ram, Pentium 75, Sound Card. As a lone fighter pilot leading a convoy of bulk cruisers into deep space, you job is to blow a way through the uncharted asteroid field. Includes Uninstall facility. Compressed file size - 723 KB. What's new in v1.5 (updated March 2002): Some new explosion graphics and a full screen facility in the top menu. Get the free Vitalize Plug-in and play Asteroids, here, now, online. Click here for details. For help with downloading and installing, click here Sign up for my Newsletter! Add your email address to the box above and click the Sign Up button to subscribe to Grey Olltwit's Newsletter and receive details of new free software programs when I add them. Before you leave please visit our sponsor, Ask Jeeves, to search the web. Type in your question below and click the Ask!

6. PERMANENT: Asteroid Mining, Space Colonies, Commercialization Rapid development of space using material from asteroids near Earth and from the Moon. http://www.permanent.com/

intro site map search news ... feedback home .....in all geologic time, our generation will get mankind off our lonely planetary cradle..... P rojects to E mploy R esources of the M oon and A steroids N ear E arth in the N ear T erm L i f e It is a race against time, before a biotechnology supervirus makes mankind extinct, or nanotechnology destroys Earth's biosphere, suddenly. G o a l s Don't expensively launch from Earth, use construction materials already in space. Build valuable, profitable products and habitats in orbit (not send back to Earth). Non-governmental, commercial, faster, cheaper large scale space development. O r g a n i z a t i o n PERMANENT is an introductory guide for all, a reference source for experts and a news site on space resources. We link to known, quality websites, stockpile technical resources of third parties not on the web, and help them publish on the web. We can do this NOW with present-day technology and a philanthropic investor Browse website Asteroids Near Earth Lunar Materials Transportation Industrial Processes ... To Do List For general or specific e-mail regarding PERMANENT, please use our Feedback page.

7. ORRERY: Asteroids - Planetary Bricks A look at how asteroids came to be discovered, what and where they are, and the potential danger they exhibit for us here on earth. http://www.harmsy.freeuk.com/asteroids.html

Please visit our sponsor: Asteroids - planetary bricks Sun Mercury Venus Earth ... Mars Asteroids Jupiter Saturn Uranus Neptune ... Kuiper Asteroids are lumps of rock, some as big as 1000 km in diameter, others as small as a computer monitor! Most of them lie in a fairly wide belt orbiting the Sun between Mars and Jupiter , called (surprisingly!) the Asteroid Belt. The word asteroid has a real meaning, much like the word planet . Asteroid means "star like", because the first asteroids that were discovered resembled very dim stars. Fig. 1: Location of the asteroids There are probably over 10,000 asteroids larger than 100 km across in the Solar System, with many millions of smaller ones. Most of these can be found in a belt between the planets Mars and Jupiter The first asteroid was discovered as a result of a curious relatonship known as Bode's Law . This is not a law at all, and is really only a coincidence. It goes as follows: Bode's Law Start with the number series in the first column below... Add to each number... Then divide by S S+4 (S+4)/10 Planet Distance Mercury Venus Earth Mars Jupiter Saturn Uranus Now compare these values with the average distances of the planets ( as known by Bode in 1772 ) from the Sun , measured in AU Top Right ^^ The Hunt Begins Alarmingly, Bode's Law produces numbers that are

8. 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 http://www.solarviews.com/eng/asteroid.htm

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, Eros, ... 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.

9. A/CC's Major News About Minor Objects A digest of news related to asteroids, comets, and meteors. Monitors changes in impact risk calculations. Includes links to original sources of information. http://www.hohmanntransfer.com/news.htm

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10. The Nine Planets The Kuiper Belt and the Oort Cloud. Sedna. asteroids http://seds.lpl.arizona.edu/nineplanets/nineplanets/asteroids.html

The Nine Planets A Multimedia Tour of the Solar System by Bill Arnett The Nine Planets is an overview of the history, mythology, and current scientific knowledge of each of the planets and moons in our solar system. Each page has text and images, some have sounds and movies, most provide references to additional related information. All of the planets can be seen with a small telescope; most can be seen with binoculars. And large telescopes continue to provide much useful information. But the possibility of getting up close with interplanetary spacecraft has revolutionized planetary science. Very little of this site would have been possible without the space program. Nevertheless, there's a lot that you can see with very modest equipment or even with just your own eyes. Past generations of people found beauty and a sense of wonder contemplating the night sky. Today's scientific knowledge further enhances and deepens that experience. And you can share in it by simply going out in the evening and looking up Contents Hardcopy The New Solar System Summarizes what we've learned from interplanetary explorations in the last 25 years. My primary reference for

11. Compare Prices And Read Reviews On Asteroids For Game Boy Color At Epinions.com Consumer reviews for the Game Boy version. http://www.epinions.com/game-Titles-Consoles-GameBoy-All-Asteroids

Join Epinions Help Sign In Game Boy Color Games Games All Categories Advanced Search Home Games Game Boy Color Games Asteroids for Game Boy Color Overall rating: Reviewed by 6 Epinions users - Write a review We found this product at 4 stores The lowest base price is Compare Prices View Details Read Reviews Subscribe to reviews on this product Compare Prices Showing 1-4 of 4 stores Sort by Store Name Sort by Store Rating Notes Sort by Price Featured Store CD Universe 43 store reviews Stock status: N/A Enter your ZIP for prices with tax and shipping. Price + Tax + Shipping = Total Price Your ZIP is used only to show applicable tax and shipping charges. at CD Universe Featured Store EB Games 41 store reviews Stock status: N/A at EB Games Featured Store 190 store reviews In stock! at Walmart Game Quest Direct 5 store reviews In stock! Usually ships the next busi... at Game Quest Direct Showing 1-4 of 4 stores Why are these stores listed? State Tax Only. Does not include local taxes. Shipping costs are estimates Please check merchant website for exact shipping costs. Read Reviews Rock Solid by Dad's Seal of Approval by brford Asteroids for colour Gameboy by krisjohn View all reviews Featured Resources Additional information on Asteroids for Game Boy Color or other products.

12. Asteroid Introduction 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 worlds of asteroids. http://rdre1.inktomi.com/click?u=http://www.solarviews.com/eng/asteroid.htm&

13. Asteroids asteroids. asteroidcomp. Dugan 1903 911 Agamemnon 778100 88 ? Reinmuth 1919 2060 Chiron 2051900 85 ? Kowal 1977 More about 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.

14. Ultimate Impact (title Provided Or Enhanced By Cataloger) Ultimate Impact (title provided or enhanced by cataloger) This Why Files article investigates the possibility of asteroid impacts on Earth. The feature covers what asteroids are, why their orbits http://rdre1.inktomi.com/click?u=http://whyfiles.org/074asteroid/index.html&

15. Compare Prices And Read Reviews On Asteroids For Windows At Epinions.com Consumer reviews for the PC version. http://www.epinions.com/game_Titles_PC-Current-Asteroids

Join Epinions Help Sign In Computer Games Games All Categories Advanced Search Home Games Computer Games Asteroids For Windows Overall rating: Reviewed by 3 Epinions users - Write a review We found this product at 2 stores The lowest base price is Compare Prices View Details Read Reviews Subscribe to reviews on this product Compare Prices Showing 1-2 of 2 stores Sort by Store Name Sort by Store Rating Notes Sort by Price Featured Store This store has not yet been rated. View store info In stock! Enter your ZIP for prices with tax and shipping. Price + Tax + Shipping = Total Price Your ZIP is used only to show applicable tax and shipping charges. at Surplus CD ROM 792 store reviews Stock status: N/A at Amazon Showing 1-2 of 2 stores Why are these stores listed? State Tax Only. Does not include local taxes. Shipping costs are estimates Please check merchant website for exact shipping costs. Read Reviews Asteroids Forever by cherylemom Just not the same as the original by phungus Great Game Play by Help Member Center Privacy Statement Site Index ... Trademark Notice Epinions.com periodically updates pricing and product information from third-party sources, so some information may be slightly out-of-date. You should confirm all information before relying on it.

16. Asteroids asteroids This World Wide Web (WWW) site, developed by National Geographic, engages students in learning about extraterrestrial objects such as asteroids, meteors, and meteorites. Comets are http://rdre1.inktomi.com/click?u=http://www.nationalgeographic.com/asteroids/ind

17. Asteroids: Deadly Impact @ Nationalgeographic.com The director needs you to nab the culprits menacing Mother Earth. asteroids. asteroids, Astronomy, Comets, Craters, Earth, Meteorites 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. Sky And Telescope - The Essential Magazine Of Astronomy Top/Science/Astronomy/Amateur/Solar_System_Observing/asteroids http://SkyandTelescope.com/observing/objects/asteroids/

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

19. Asteroids Historyof Discovery. People were looking for more planets. GiovanniPiazzi discovered the first asteroid Ceres. in 1801. Minor planets thousands of them( list) (pic) ( Short Tables of some selected http://aurora.phys.utk.edu/~daunt/study_guides/Asteroids.html

Study Guide Asteroids Gaspra History of Discovery People were looking for more planets Giovanni Piazzi discovered the first asteroid Ceres in 1801 Minor planets thousands of them list pic (Short Tables of some selected asteroids: and Properties Albedo Compositions types ) of asteroids more Main types are: C (carbonaceous), S (silicates), M (metallic) Old remnants of early solar system Many Families of asteroids: Trojan, Apollo, Amor, Aten, Centaurs and others Main Asteroid Belt Most known asteroids (95%) lie in orbits between Mars and Jupiter (2.2-3.2 AU) Main ones are Ceres, Pallas , Juno and Vesta more which were discovered between 1801 and 1807 Over 2000 named while others are just numbered in the order of their discovery Gaspra Mathilde more pic ... pic Due to orbital resonances with Jupiter Trojan Asteroids list Located at the L4 and L5 Lagrange points at 60 degrees in front of and behind Jupiter in its orbital track around the Sun Joseph Lagrange Lagrangian points Discovery of first ones in 1904/1906 Trans-Neptunian Objects TNO s) Kuiper Belt Chiron more ... pics Comet or asteroid?

20. 4179 Toutatis De Pater, I., P. Palmer, DL Mitchell, SJ Ostro, and DK Yeomans 1994. Radar Aperture Synthesis Observations of asteroids. Icarus 111, 489–502. http://www.eecs.wsu.edu/~hudson/Research/Asteroids/4179/

The Earth-Crossing, and Potentially Hazardous Asteroid 4179 Toutatis Scott Hudson School of Electrical Engineering and Computer Science Washington State University Contents Images and Animations Discovery and other background Observations Modeling (includes downloadable shape model) ... (Note on use of images from these pages) Images and Animations (Note: In producing some of the following renderings I applied a "plausible" surface texture and color. Unless otherwise stated, all renderings were done by Scott Hudson using Ray Dream Studio or POVray.) Press here to see where Toutatis currently is (14k gif). (288k MPEG) (170k Real Video) One of the most amazing things about Toutatis is its bizarre, non-principal-axis spin state. This animation shows Toutatis as viewed on the plane of the sky as it rotates over about fifty days. (Rendered by Scott Hudson using POVray.) The reason that the great majority of (known) solar system objects are in principal-axis spin states is tidal damping . Assume an object is rotating about some axis at an angular rate of W and the moment of inertia about this axis is I. The angular momentum L=IW is a constant because of the conservation of angular momentum. The kinetic energy is T=IW . Since W=L/I we have T=L /I. Any real object that is wobbling around will dissipate energy through internal friction, so T will decrease. The only way for this to happen is for I to increase (L is a constant). Therefore, the spin state will evolve until the object is rotating about the axis of maximum I, which is the spin state of minimum energy for a given angular momentum. This process has already more-or-less happened for the majority of known solar system bodies. That is why we find them in principal-axis spin states about their axis of maximum inertia. The tidal damping process is illustrated in this animation

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