21. A Scale Model Of The Solar System online Java applet This 3d solar system applet can be rotated and zoomed with the mouse. Below it are links to other online gravity simulators and resources for building solar system simulations. http://www.burtleburtle.net/bob/physics/solar.html

This applet is the obligatory scale model of the solar system. Distance is in AUs, velocity in AUs per hour, mass in units of 10 pounds, yielding G=1.2944x10 . Initial positions are accurate to about 5 digits. The simulation doesn't account for relativity, oblateness of the sun, solar winds, asteroids, galactic gravitational flux, and any number of other things. The numbers in the corner count how many displays have been done and the fractional error in energy conservation. It starts 1am on January 1, 1999. To start or stop, click. To spin around the sun, click in the middle and drag. To rotate and zoom, click near the edges and drag. The sun remains in the center; there are no controls yet to change that, or to change the distance from the sun. I also have and applet description , some online references for how to build a solar system simulator, a set of stable orbits filling 3-space , a page exploring gravitation with Java , a simulation of Cruithne , and Klemperer rosettes sun mercury venus earth+moon mars jupiter saturn uranus neptune pluto The US Navy provides the coordinates of all planets now, and at any other time give or take a century. I used this for my initial coordinates. (Position is at 1am on January 1, 1999, and velocity is half of 2am minus midnight.)

22. Build A Solar System Build a solar system This webpage provides a calculation tool to aid in the creation of a scale model of the solar system. The program computes model planet sizes and distances using an initial http://rdre1.inktomi.com/click?u=http://www.exploratorium.edu/ronh/solar_system/

23. Planetary Data System - Home solar system exploration science data archive, maintained at JPL. http://pds.jpl.nasa.gov/

+ NASA Homepage + Contact NASA The Planetary Data System (PDS) The PDS archives and distributes scientific data from NASA planetary missions, astronomical observations, and laboratory measurements. The PDS is sponsored by NASA's Office of Space Science. Its purpose is to ensure the long-term usability of NASA data and to stimulate advanced research. PDS is continually upgrading and updating its archives, to better serve the needs of its user communities. Learn more about PDS PDS Nodes - The Best of Planetary Data! The PDS includes seven university/research center science teams, called discipline nodes. These nodes specialize in specific areas of planetary data. The contributions from these nodes provide a data-rich source for scientists, researchers and developers. You can visit them through the links on the PDS Nodes navigation bar, below. You will learn more about the archives of each node, and about the education and public outreach services that these nodes provide. + Freedom of Information Act + NASA 2003 Strategic Plan Accessiblity Certification Curator: Valerie L. Henderson

24. Virtual Solar System @ Nationalgeographic.com Discover the wonders of our solar system in a spectacular 3D environment.Take a flyby tour of the sun and each planet in its orbit http://www.nationalgeographic.com/solarsystem/splash.html

Discover the wonders of our solar system in a spectacular 3-D environment. Take a flyby tour of the sun and each planet in its orbit, observe planets and extraterrestrial weather patterns up close, and more. For PC only Requires free Viscape SVR plug-in For PC and Mac

25. Solar System Astronomy A timeline. http://www.gsu.edu/other/timeline/planets.html

26. Orrery : Solar System Simulator A Java applet that simulates gravitating masses. Features a working model with motions and sizes of 70 planets and moons to scale. http://www.cuug.ab.ca/~kmcclary/

Update(Nov.2000)The Linux version of the new Mozilla close all applications before clicking on the model links. use a small browser window, the problem gets worse as the size of the display increases. while zooming turn "PLAY" off and don't drag the mouse - just click. Zoom: Click or drag the mouse near the edge/center of the display (black area) to ZOOM out/in. Destroy, Create (not working in some models) see below In some models the status line of your browser shows the width of the display in kilometers, astronomical units and light years. Orrery : Solar System Simulator A Java Applet that simulates gravitating masses. Solar system models and demos of Lagrange points, solar system stability, etc. New! Orrery with NASA Images Links ( Most contributed by Jeff K. ) Calculators Online Applets (write once, crash everywhere): N-Body motion simulation in Java Gravitation 3.8 Solar Sail Navigation School Inner Solar System Model ... JLABS Orrery Applet Other software: Orrery program using Java-3D Orbit Xplorer Windows, 15 second demo. Gravitator Pro Newtons Aquarium (MacOS - free demo offered) Mercury Celestial and Orbital Mechanics Web Site Other solar system sites: Solar System Live (Where are the planets today?)

27. Astronomy 161: The Solar System Astronomy 161 The solar system In this semester of Astronomy we shall concernourselves primarily with the solar system. As an introduction http://csep10.phys.utk.edu/astr161/lect/

Astronomy 161 The Solar System In this semester of Astronomy we shall concern ourselves primarily with the Solar System. As an introduction to that, we shall consider the historical development of our modern picture of the Solar System. Introduction A Sense of Time and Scale in the Universe Precursors to Modern Astronomy Overview of the Sky and Planets ... ASTRONOMY 162 LECTURES Next Back Top Home Help

28. The Nine Planets A multimedia tour of the solar system. http://www.nineplanets.org/

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

29. The Copernican Model: A Sun-Centered Solar System The Copernican Model A SunCentered solar system The Earth-centered Universe ofAristotle and Ptolemy held sway on Western thinking for almost 2000 years. http://csep10.phys.utk.edu/astr161/lect/retrograde/copernican.html

The Copernican Model: A Sun-Centered Solar System The Earth-centered Universe of Aristotle and Ptolemy held sway on Western thinking for almost 2000 years. Then, in the 16th century a new idea was proposed by the Polish astronomer Nicolai Copernicus The Heliocentric System In a book called On the Revolutions of the Heavenly Bodies (that was published as Copernicus lay on his deathbed), Copernicus proposed that the Sun, not the Earth, was the center of the Solar System. Such a model is called a heliocentric system . The ordering of the planets known to Copernicus in this new system is illustrated in the following figure, which we recognize as the modern ordering of those planets. The Copernican Universe In this new ordering the Earth is just another planet (the third outward from the Sun), and the Moon is in orbit around the Earth, not the Sun. The stars are distant objects that do not revolve around the Sun. Instead, the Earth is assumed to rotate once in 24 hours, causing the stars to appear to revolve around the Earth in the opposite direction. Retrograde Motion and Varying Brightness of the Planets The Copernican system by banishing the idea that the Earth was the center of the Solar System, immediately led to a simple explanation of both the varying brightness of the planets and retrograde

30. Cycles, Resonances, Synchronizations Cyclical phenomena in the solar system. http://www.sweb.cz/vladimir_ladma/english/cycles/cycles.htm

Cycles, resonances, synchronizations Cyclical phenomena in the solar system. Synodic period (Conjunctions, multiple conjunctions, switching of cycles) Axial period (Motion of axes, symmetry, solar activity, synchronization) Inequalities (Planetary inequalities, great inequality Jupiter-Saturn) Resonances (Types of resonances, resonant relations, examples) Inverse motion (Mutually inverse motion of Uranus and Neptune) Stable resonance (Independence on selection of reference system) Motion of Mercury and Venus (Some peculiarities of motion of these planets) Synchronization with Jupiter (Jovian influence on inner planets) Synchronization of conjunctions (Synchronization of planets and their moons) Eclipse year (Motion of lunar line of nodes, conjunctions with planets) Missing loop (Conjunctions of inner planets) Overlapping of cycles (Composition of real cycles, long period cycles of solar activity) Optimal motion (Gravitational repulsion, minimum interaction, Ovenden's principle) Mayan cycles (Tzolkin, katun, Aztecan century, baktun,...) Correlation of Mayan and Julian calendar (Serpent numbers, symmetry, examples of correlations)

31. Around The Solar System -- Top Level Page Learn about the objects that make up the solar systemby collecting solar system Trading Cards. http://amazing-space.stsci.edu/resources/explorations/trading/

Learn about the objects that make up the Solar System by collecting Solar System Trading Cards

32. USGS Astrogeology Program - Browse The Solar System Browse the solar system. Kids will love this. http://wwwflag.wr.usgs.gov/USGSFlag/Space/wall/wall.html

Planets Browse the Solar System Click on a planetary image in the chart below to obtain more information on the selected object. NOTE: If you aren't using an image map capable browser, there is a text selection page available. To view an developing collection of spacecraft imagery, see NASA's Planetary Photojournal run by the USGS Astrogeology Research Program or the mirror site at NASA's Jet Propulsion Laboratory (JPL). Purchasing Information Copies of this chart, "Mapping the Solar System," are for sale by USGS Information Services Box 25286, Building 810 Denver Federal Center Denver, CO 80225 Telephone: (303) 202-4700 Fax: (303) 202-4693 The catalog number needed to order this chart is 28635. This poster was published as I-2447. The current cost is $7.00. A $5.00 handling charge is applied to all orders.

33. Calvin J. Hamilton's Pages Unavailable Views of the solar system; Multiscale maps of Washington, DC, Mars, and theSan Francisco Bay area. We apologize for any inconvenience this may cause. http://www.c3.lanl.gov/~cjhamil/SolarSystem/homepage.html

Calvin J. Hamilton's Pages Unavailable Calvin J. Hamilton has left the Los Alamos National Laboratory. As a result, his web pages are no longer being hosted at this site. He is currently trying to move them elsewhere; when the sites become active again, the links will be added to the following list. Views of the Solar System Multi-scale maps of Washington, DC, Mars, and the San Francisco Bay area We apologize for any inconvenience this may cause. c3webmeister@c3.lanl.gov

34. Astrophoto.ca solar system and deep sky photos using a 4.5 newtonian f8.0 http://pages.infinit.net/gce/astro/

Philippe Chrétien's Astrophotography You will be redirected to http://www.astrophoto.ca in seconds.

35. PlanetScapes New Spanish. French. German. This is the source for 3D planetary modeling containingmaps of the solar system and models of various moons and asteroids. http://planetscapes.com/

SOLARVIEWS CRPUZZLES SCIENCEVIEWS BOOK STORE ... CROSSWORD Languages English Portuguese Spanish French ... German This is the source for 3D planetary modeling containing maps of the solar system and models of various moons and asteroids. Calvin J. Hamilton's Art Gallery This is a collection of computer generated art produced by Calvin J. Hamilton, the author of Views of the Solar System. Calvin J. Hamilton

36. ACCREATION OF THE EARTH AND SOLAR SYSTEM: A New Cosmology Copyright 1999, Lawren Introduces a new theory of creation of the Earth and solar system. http://home.earthlink.net/~meteordust/

New evidence that the Earth is rapidly increasing in size and mass contradicts Laplace's Nebular Hypothesis of Earth's creation, now 200 years old. Accreation (creation by accretion) is presented here as a new concept of planetary creation to replace it. Accreation (creation by accretion) is a byproduct of 35 years of research and study that proved Earth's diameter has expanded rapidly in the past ~200 Ma. In that relatively short period of geologic time all of today's oceans, and most of the water that now fills them, have been created by melting and expansion of Earth's core. (See http://www.expanding-earth.org) The Earth is increasing in size and mass by daily accretion of extraterrestrial meteorites and meteor dustadditional weight that is gravitationally focused on the planet's exact center, thereby generating compressive heat and thermal expansion of the core. (See diagram below) Core expansion is the mechanism causing the Earth to expand, and the rate of expansion accelerates over time as the planet increases in mass by daily bombardment of THOUSANDS OF TONS of meteorites and meteor dust that also adds a thin layer of dust on the surfacewith a 75% chance of falling on some body of water. This is the primary source for the oceans' deep sediment layers that have accumulated over the past ~200 Ma as new ocean seafloors have been generated by volcanic magma extruded via the midocean ridges that now encircle the Earth. The current philosophy of creation of the Earth and Solar System is based on two ancient but closely-related historical documents: (1) The story in Genesis that God created the heavens and earth in six days; and (2) Laplace's Nebular Hypothesis of creation of Earth and other planets of the Solar System that was published in 1796, a period in history when philosophical notions of Nature's wonders had to agree generally with the Bible's teachings.

37. Solar System Tutor - Zoom Astronomy Our solar system, Zoom Astronomy solar system Tutor, Zoobooks magazine for kids!Click now for Zoobooks! In our solar system, which planet is closest to the Sun? http://www.enchantedlearning.com/subjects/astronomy/tutor/solarsystem/1/

Our Solar System Zoom Astronomy Solar System Tutor Click now for Zoobooks! Our solar system consists of a central Sun, which is orbited by nine planets (and their moons), an asteroid belt, many comets and meteors, plus gas and microscopic dust. The Sun is a medium-sized star. It is orbited by the following (in order from the Sun): Mercury, Venus, Earth, Mars, the asteroid belt, Jupiter, Saturn, Uranus, Neptune, and Pluto. The first four planets (Mercury, Venus, the Earth, and Mars) are small, rocky planets. After the orbiting belt of small rocky/metallic asteroids are four gas giants (Jupiter, Saturn, Uranus, and Neptune). The ninth planet is Pluto, a small, rocky planet. In our Solar System, which planet is closest to the Sun? Mercury Venus Earth EnchantedLearning.com How to cite a web page

38. BBC - Science & Nature - Space - Solar System Your travel guide to the solar system from BBCi. Includes exclusive You arehere BBC Science Nature Space solar system. solar system, http://www.bbc.co.uk/science/space/solarsystem/

@import url('/includes/tbenh.css') ; Home TV Radio Talk ... A-Z Index SATURDAY 12th June 2004 Text only Animals Prehistoric Life Genes ... BBC Homepage In Space Solar System 3D tour Sun ... Help Like this page? Send it to a friend! You are here: BBC Space SOLAR SYSTEM DEFINITION The Solar System is made up of the Sun, the planets, their moons, asteroids and comets REASONS TO VISIT Experience an amazing variety of worlds Run the gauntlet of floating rocks and boulders in the asteroid belt Encounter the icy comets that wander through the outer Solar System Solar System Jigsaw Can you build the Solar System? WHAT TO SEE The Sun The Sun is a star that lives at the centre of the Solar System. Its huge gravity holds the planets in place. The planets The planets all revolve around the Sun. There are nine in total - Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. Moons Moons rotate around their parent planet. Earth has one moon, but some planets have over 30. Only Mercury and Venus do not have any moons. Asteroids Asteroids are rocky bits of debris up to 1,000km (620 miles) across. Most live in the asteroid belt between Mars and Jupiter. They are the remnants from early planets that collided and were torn apart. Comets Comets are dirty snowballs of ice and dust that revolve around the Sun in long orbits. When they approach the Sun they heat up, leaving a trail of gas behind them, which looks like a tail.

39. Astronomy For All Extensive index full of graphics and illustrations about stars, the solar system, cosmology and Galileo. http://www.pd.astro.it/hosted/MOSTRA/E-MOSTRA/A0000HOM.HTM

40. Astronomy For Kids: The Planets Of Our Solar System Astronomy.com’s Astronomy For Kids is a fun place for kids to learn about theplanets in our solar systemClick on the planet images to find out more. http://www.astronomy.com/content/static/AstroForKids/default.asp

Astronomy.com: Terri Field

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