21. NASA - JPL Solar System Simulator A NASA/JPL/Caltech spyglass on the cosmos. Select from the options to have the simulator create a color image of your favorite planet or satellite. http://space.jpl.nasa.gov/

+ View the NASA Portal Search JPL Targets and Date Show me The Solar System The Sun Mercury Venus Earth ...The Moon Mars ...Phobos ...Deimos Jupiter ...Io ...Europa ...Ganymede ...Callisto Saturn ...Mimas ...Enceladus ...Tethys ...Dione ...Rhea ...Titan ...Hyperion ...Iapetus ...Phoebe Uranus ...Ariel ...Umbriel ...Titania ...Oberon ...Miranda Neptune ...Triton ...Nereid Pluto ...Charon Cassini spacecraft Phoenix spacecraft Voyager 1 spacecraft Voyager 2 spacecraft Pioneer 10 spacecraft Pioneer 11 spacecraft Spitzer (SIRTF) spacecraft Rosetta spacecraft Ulysses spacecraft New Horizons spacecraft Messenger spacecraft Dawn spacecraft as seen from above below The Sun Mercury Venus Earth ...The Moon Mars ...Phobos ...Deimos Jupiter ...Io ...Europa ...Ganymede ...Callisto Saturn ...Mimas ...Enceladus ...Tethys ...Dione ...Rhea ...Titan ...Hyperion ...Iapetus ...Phoebe Uranus ...Ariel ...Umbriel ...Titania ...Oberon ...Miranda Neptune ...Triton ...Nereid Pluto ...Charon Cassini spacecraft Phoenix spacecraft Voyager 1 spacecraft Voyager 2 spacecraft Pioneer 10 spacecraft Pioneer 11 spacecraft Spitzer (SIRTF) spacecraft Rosetta spacecraft Ulysses spacecraft New Horizons spacecraft Messenger spacecraft Dawn spacecraft On Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec in the year at UTC Field of View (choose one) I want a field of view of degree(s) I want the body to take up percent of the image width Options (choose any) -orbits -extra brightness -show all spacecraft Samples Artwork Maps Models ... Kudos Simulator Developer / Graphic Artist:

22. Solar System Solar System comprises the Sun and the retinue of celestial objects gravitationally bound to it http://www.solar-system.name/

Main Menu Solar System Planets and Bodies Layout and Structure Formation ... Contact Solar System Solar System - The solar system comprises the Sun and the retinue of celestial objects gravitationally bound to it: the eight planets, their 162 known moons, three currently identified solar system dwarf planets and their four known moons, and thousands of small bodies. This last category includes asteroids, meteoroids, comets, and interplanetary dust. In broad terms, the charted regions of the Solar System consist of the Sun, four rocky bodies close to it called the terrestrial planets, an inner belt of rocky asteroids, four gas giant planets and an outer belt of small icy bodies known as the Kuiper belt. In order of their distances from the Sun, the planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Six of the eight planets are in turn orbited by natural satellites (usually termed "moons" after Earth's Moon) and every planet past the asteroid belt is encircled by planetary rings of dust and other particles. The planets other than Earth are named after gods and goddesses from Greco-Roman mythology. From 1930 to 2006, Pluto, the largest known Kuiper belt object, was considered the Solar System's ninth planet. However, in 2006 the International Astronomical Union (IAU) created an official definition of the term "planet". Under this definition, Pluto is reclassified as a dwarf planet, and there are eight planets in the Solar System. In addition to Pluto, the IAU currently recognizes two other dwarf planets: Ceres, the largest object in the asteroid belt, and Eris, which lies beyond the Kuiper belt in a region called the scattered disc. Of the known dwarf planets, only Ceres has no moons.

23. All About The Solar System History of and basic facts about major solar system bodies. http://evula.org/solarsystem/

THE SYSTEM Introduction The Sun Mercury Venus ... The Oort Cloud OTHER About Solar System Quiz Introduction Our Solar System was created when a nebula, made up of mostly hydrogen, gradually collapsed and formed a spinning protostar. Gravitational contraction heated the protostar and a nuclear fission reaction was sparked in the hot, dense gas that condenced at its center. Our Sun was born. The planets were formed from the remaining disc of material still swirling around our new-born Sun. The largest four of our planets were composed of mainly hydrogen as well as helium. They and the Sun are relics of protostellar material that existed 4.6 billion years ago. The impurities went to form the terrestrial planets. Note: The Solar System Quiz has recently been updated to version 3.0.0 Counter provided by digits.com

24. The Nine Planets Solar System Tour Information about each planet and moon in our solar system with many pictures, discussion of the history of its discovery, exploration, and physical characteristics. In http://nineplanets.org/

A Multimedia Tour of the Solar System: one star, eight planets, and more site map This website is an overview of the history, mythology, and current scientific knowledge of the planets, moons and other objects in our solar system. Each page has my text and NASA 's images, some have sounds and movies, most provide references to additional related information. All eight planets can be seen with a small telescope; or binoculars. And large observatories 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 The IAU has changed the definition of "planet" so that Pluto no longer qualifies. There are now officially only eight planets in our solar system. Of course this change in terminology does not affect what's actually out there. In the end, it's not very important how we classify the various objects in our solar system. What is important is to learn about their physical nature and their histories.

25. Solar System Our Solar System One in a Hundred Billion? P lanet Earth is part of a vast space neighborhood called the solar system. Our solar system is an amazing place. http://www.globio.org/glossopedia/article.aspx?art_id=36

26. Solar System Shows the position of the planets as they rotate around the sun for many years to come. http://www.faustweb.net/

Solar System Simulator Welcome to the interactive web model of the Solar System, a simple astronomical simulator and predictor of planet orbits that displays dynamic view of the Solar System as seen from the north ecliptic pole. This Solar System simulator is an entertaining, and educational astronomy program that provides an excellent way to learn about the Solar System from a particular point of view. You can zoom in and out to view the entire Solar System, or just the inner planets. By pressing the STOP button a text entry box allows you to enter new values for the date. ENTER

27. Solar System - SolarSystem.com - The Official Online Solar System Solar System SolarSystem.com is the leading online portal for everything in the Solar System including science, space, astronomy, earth, and green technologies. Research your http://solarsystem.com/

Solar System Photos EARTH COMMAND SS DOT COM Solar System News Space News Top Internet Stories PLAE Games ... Solar Soft Sun Solar Status Solar X-rays / Geomagnetic Field *n3kl.org SS DOT BIZ Business Space Catalog Golf 2 ... SS COM TV Image Tele-Viewer PLAE TV PLAE RECORDS com ... Home Theater Speakers Top Stereo Speakers under the Sun Free Articles US Golf National Job Service MyPLAER ... AMPM Drink PLAER not player Internet Marketing - ZTMC Phoenix Landscaping Hot Word Cloud ... jobs Welcome to the Solar System.com Search The Solar System Now: Top News Rss widget Check out the the Universal Media PLAER @ PLAE.com! 'PLAE' awesome GAMES and join the Community at www.PLAE.com/GAMES PLAE Games and Watch TV in the Solar System Dot Com PLAE PLAE MONEY Free @SS Email GAMES ... S.S. TV

28. Planets - NASA Science Advancing scientific knowledge of the origin and history of the solar system, the potential of life elsewhere, and the hazards and resources present as humans explore space. http://science.nasa.gov/planetary-science/

Skip to Main Content Header Visit NASA.gov Connect ... Site Map Search Site Go! Home Big Questions Earth Heliophysics ... Home → Planets Planets NASA is celebrating the Year of the Solar System! Spanning a Martian year (23 months), numerous missions will encounter their targets—the Moon and Mars, Mercury and Jupiter, and even comets and asteroids! It’s an unprecedented time in planetary sciences as we learn about new worlds and make new discoveries! Join the exploration at http://solarsystem.nasa.gov/yss/ People have been watching planets, moons, and comets wander amongst the stars for millennia. Yet it was always "look, don't touch" until 1969, when NASA sent two men to Earth's moon – and they came back with lunar rock and soil for scientists to study. Since those first footsteps, NASA has broadened its reach with an increasingly sophisticated series of explorers that have landed on asteroids, tasted the swirling gases of Jupiter's atmosphere, and collected the breath of the Sun. Just in the past few years, we have: Discovered potential liquid water on what was once thought to be a cold, dead moon of Saturn

29. Planet Facts.net Provides photographs and information about each planet in the solar system. http://www.planetfacts.net

The Home For Interesting Planet Facts Mercury Facts Venus Facts Earth Facts Mars Facts ... More Space Facts Welcome to a site filled with fun planet facts on all the planets of our Solar System There are eight planets that orbits the Sun: Mercury Venus Mars Earth Jupiter Saturn Uranus and Neptune . On this site, each planet has its own facts page, with interesting and little known facts about each planet. Pluto has its own facts page too, even though it has been declassified as a planet. Select Which Planet Facts Page You want to See: Mercury - The closest planet to the Sun Venus - A beautiful looking planet with a deadly atmosphere Earth - Our home planet Mars - The Martian planet ... Pluto - The Ex-Planet If you are looking for Facts on Space and the Universal in general, then head over to the More Space Facts page So What Defines A Planet? The International Astronomical Union defines a planet as a celestial body that orbits around a star (like our sun) and is big enough that it forms into a shape of a sphere by its own gravity. But a planet cannot be big enough that it can cause thermonuclear fusion. It also has to have a clear orbit with no other bodies of comparable size influencing its gravitational force. Did You Know There Are Two Categories of Planets?

30. Solar System - How To Videos Solar System Our Solar System consists of the Sun, the eight planets, their 165 known moons, three dwarf planets (Ceres, Eris, and the recently downgraded Pluto) and their four known moons http://www.videojug.com/tag/solar-system

31. Solar System: Definition From Answers.com n. often Solar System The sun together with the eight planets and all other celestial bodies that orbit the sun. A system of planets or other bodies orbiting another star. http://www.answers.com/topic/solar-system

32. Solar System Integrator A Java applet that enumerates ephemerides and predicts celestial events in the Solar System. Various graphical and text views are available. http://rgg.szm.com/solar/solar.htm

Solar v1.2 is solar system integrator It enumerates ephemerides and various celestial events using Runge-Kutta method and NASA-JPL initial states These phenomenas aren't yet taken into account: atmospheric refraction [ <1' above 45° altitude] abberation [ astrometric light travel time delay [ relativistic light deflection [ relativistic corrections in eq. of motion [ <1"/y for Mercury] nutation [ libration / earth-moon tides planetary system barycenter vs. planet center [ In the menu Others > Set Location set your geographical location to obtain proper issues. Sorry, your Internet Browser doesn't support JAVA document.write('');

33. Solar System, Solar System Information, Facts, News, Photos Get information, facts, photos, news, videos, and more about our solar system from National Geographic. http://science.nationalgeographic.com/science/space/solar-system

34. The Solar System Solar System/Space Research/Informational Sites. Astronomy and Space Exploration Gallery Pick your destination!! Where would you like to go or what would you like to see? http://edtech.kennesaw.edu/web/solar.html

Solar System/Space Research/Informational Sites Astronomy and Space Exploration Gallery - Pick your destination!! Where would you like to go or what would you like to see? Astronomy for Kids - This is a great site for elementary students. Earth Exploring Planets in the Classroom - More than 25 hands-on science activities for teachers and students. Galileo Amazing Facts Jupiter KidsAstronomy.com - Includes information about space and the solar system. Also fun and games here! Kids Space Mars Mercury Mysteries of Deep Space ... Solar System Guide - Non-technical overview of the Solar System. Space Stuff - Level 1 Space Stuff - Level 2 The Sky - All of these links are wonderful-Don't miss a single one of them!! The Nine Planets: A Multimedia Tour of the Solar System - Includes links to about 90 WWW "pages", one page for each major body in the Solar System. The Solar System - Level 1 - Don't forget to click on all the links for additional information. Awesome site!!! (K-2) The Solar System - Level 2 - Click on all the links! Cooool!! (3-5) The Universe - Level 1 - You don't need a textbook here! (K-2)

35. Planets Alive - Our Solar System - General Info Information about the planets and other objects found within the solar system. Includes details of their structure and atmosphere, physical parameters, rings, satellites and missions. http://www.planetsalive.com

outputflash("leftnav","leftnav.swf",160,700,"allowScriptAccess=sameDomain;quality=best;bgcolor=#000000;flashvars=tab=A"); Our Solar System General Information The planets, most of the satellites of the planets and the asteroids revolve around the Sun in the same direction, in nearly circular orbits. When looking down from above the Sun's north pole, the planets orbit in a counter-clockwise direction. The planets orbit the Sun in or near the same plane, called the ecliptic. The former planet Pluto, and many of its Kuiper Belt neighbours are a special cases in that their orbits are highly inclined and highly elliptical. The axis of rotation for most of the planets is nearly perpendicular to the ecliptic. The exception is Uranus, which is tipped on its side. The Origin of the Solar System Five billion years ago a cloud of hot swirling dust and hydrogen gas gave birth to our Sun and planets. As the cloud spun and collapsed inwards it flattened into a central mass with a surrounding disk. Dust and gases in the disk formed small condensations each spinning about its own centre. Gravitation condensed and heated the central mass. Density increased dramatically and [nuclear] fusion began. Energy was released and our Sun flared into existence. The solar wind of the newly ignited Sun blew away leftover dust and gas in the vicinity of the inner condensations, leaving the rocky inner planets: Mercury, Venus, Earth and Mars. In the outer regions of the disk, the solar wind was weaker. The remaining dust and gas condensed into the larger gaseous planets: Jupiter, Saturn, Uranus and Neptune.

36. Solar System Coloring Pages: EnchantedLearning.com Solar System Coloring Pages. EnchantedLearning.com is a usersupported site. As a bonus, site members have access to a banner-ad-free version of the site, with print http://www.enchantedlearning.com/subjects/astronomy/activities/coloring/

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. Become a member of Enchanted Learning. Site subscriptions last 12 months. Click here for more information on site membership. As low as $20.00/year (directly by Credit Card Site members have access to the entire website with print-friendly pages and no ads. (Already a member? Click here. Our subscribers' grade-level estimate for this page: 2nd - 3rd More Astronomy Books EnchantedLearning.com's Solar System Coloring Pages Solar System Calendar You can print out these pages on the Solar System and color them. To print a page, go to that page and then choose the "Print" command from the File menu. Cover Solar System Solar System (big version) Sun ... Enchanted Learning Over 25,000 Web Pages Sample Pages for Prospective Subscribers Overview of Site What's New Enchanted Learning Home Monthly Activity Calendar Books to Print ... Site Index K-3 Crafts K-3 Themes Little Explorers Picture dictionary PreK/K Activities Rebus Rhymes Stories Writing Cloze Activities Essay Topics Newspaper Writing Activities ... Parts of Speech Fiction The Test of Time Biology Animal Printouts Biology Label Printouts Biomes Birds ... Whales Physical Sciences: K-12 Astronomy The Earth Geology Hurricanes ... Volcano Languages Dutch French German Italian ... Swedish Geography/History Explorers Flags Geography Inventors ... US History Other Topics Art and Artists Calendars College Finder Crafts ... Label Me! Printouts

37. Kuiper-Oort Primer on objects in the outer solar system from The Nine Planets multimedia tour of the solar system. http://www.nineplanets.org/kboc.html

The Kuiper Belt and The Oort Cloud The Kuiper Belt is a disk-shaped region past the orbit of Neptune extending roughly from 30 to 50 AU from the Sun containing many small icy bodies. It is now considered to be the source of the short-period comets. Occasionally the orbit of a Kuiper Belt object will be disturbed by the interactions of the giant planets in such a way as to cause the object to cross the orbit of Neptune. It will then very likely have a close encounter with Neptune sending it out of the solar system or into an orbit crossing those of the other giant planets or even into the inner solar system. There are presently nine known objects orbiting between Jupiter and Neptune (including 2060 Chiron (aka 95 P/Chiron) and 5145 Pholus; see the MPC's list ). The IAU has designated this class of objects as Centaurs . These orbits are not stable. These objects are almost certainly "refugees" from the Kuiper Belt. Their future fate is not known. Some of these show some cometary activity (ie, their images are a little fuzzy indicating the presence of a diffuse coma ). The largest of these is Chiron which is about 170 km in diameter, 20 times larger than

38. Solar System Exploration The Solar System Exploration Home Page is part of NASA's Office of Space Science and describes NASA's program to explore the solar system. http://solarsystem.nasa.gov/

39. ORRERY: The Solar System In Action A concise tour containing numerous educational resources, and support for Spacetech s Orrery application. http://www.harmsy.freeuk.com/orrery.html

40. Solar System, The Solar System, Planets Solar System At SPACE.com Space.com explains solar system, the solar system, planets solar system, picture of solar system and picture of the solar system http://www.space.com/solarsystem/

dartTag = 'homepage/home'; All About the Solar System The solar system is the home to the sun, nine planets including the Earth , the 158 known moons that orbit those planets, as well as a countless number of other celestial bodies that exist throughout this vast space. Such celestial bodies include things like asteroids meteoroids and comets Though the events leading up to the formation of the solar system are still being debated, is it believed to be more than 4.6 billion years old! The word "solar" is derived from the Latin word for sun , Sol, leading to the term solar system, or the system of the sun. The planets that orbit the sun within the solar system include Mercury Venus Earth Mars ... Neptune , and the smallest planet of Pluto . Jupiter is by far the largest with an overall mass of more than three times that of the Earth. The sun itself makes up an estimated 99.86% of the solar system’s total mass. Gain further insight into the solar system by taking advantage of the solar system articles, solar system pictures or other interactive features below. Featured Solar System Articles Pluto Demoted: No Longer a Planet in Highly Controversial Definition Astronomers Sharply Divided on New Planet Definition Harnessing Asteroids and Comets to Travel the Solar System Nearest Planet Beyond Solar System Might Be Photogenic ... The Wayback Machine? Nearby Solar System Looks Like Home

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