What's the difference between big gas giant planets like Jupiter and stars?

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Solar System Dynamics - This site provides information related to the orbits, physical characteristics, and discovery circumstances for most known natural bodies in orbit around our sun.

Solar System   Solar System Visualizer
Known bodies in the solar system larger than 200 miles in diameter
Elongation/Opposition Dates

Views of the Solar System presents a vivid multimedia adventure unfolding the splendor of the Sun, planets, moons, comets, asteroids, and more. Discover the latest scientific information, or study the history of space exploration, rocketry, early astronauts, space missions, spacecraft through a vast archive of photographs, scientific facts, text, graphics and videos. Views of the Solar System offers enhanced exploration and educational enjoyment of the solar system and beyond.

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. Interplanetary spacecraft have revolutionized planetary science. Very little of this document would have been possible without the space program.

Current Planetary Exploration Missions

JPL's Solar System Simulator
Jupiter satellite events and GRS times
Jupiter's Known Satellites

Interactive Star Atlas   Object Catalogue: Planets
Planetary Summary
JPL's Ephemeris Generator
Twelve Year Planetary Ephemeris: 1995 - 2006
Association of Lunar & Planetary Observers (data)

U.S. Naval Observatory - Data Services

Clickable Planetary Maps
Planetary Maps

The Kepler Mission - NASA Discovery mission #10, is specifically designed to survey a portion of our region of the Milky Way galaxy to discover dozens of Earth-size planets in or near the habitable zone and determine how many of the billions of stars in our galaxy have such planets.

The Extrasolar Planets Encyclopaedia - The discovery of the first extra-solar planet surrounding a main-sequence star was announced in 1995, based on very precise radial velocity (Doppler) measurements. A total of 34 such planets were known by the end of March 2000, and their numbers are growing steadily. The newly-discovered systems confirm some of the features predicted by standard theories of star and planet formation, but systems with massive planets having very small orbital radii and large eccentricities are common and were generally unexpected.

The Search for Extrasolar Planets - A "planet" is an object that has a mass between that of Pluto and 10 Jupiter masses and that forms from material that is orbiting an object above 10 Jupiter masses.



Copyright 2012 - Samuel J. Wormley