The Solar System in the Yahoo! Directory

Astronomical Calculations
Including coordinate conversion, position and circumstances of the moon, and positions of the planets. Approximate methods used.
www.xylem.f2s.com/kepler
ESA Aurora Programme
Responsible for formulating, then implementing, a European long-term plan for the robotic and human exploration of solar system bodies holding promise for traces of life.
www.esa.int/SPECIALS/Aurora/index.html
From Stargazers to Starships
Deals with the world of gravity: of massive planets and stars, and the way spaceflight is achieved despite their strong pull. Topics include astronomy of the Earth's motion in space and Newtonian mechanics.
www-spof.gsfc.nasa.gov/stargaze/Sintro.htm
HappyNews.com: Our Solar System
Issue of Happy News Living magazine exploring the planets of the solar system. Articles include Mars information for kids, solar eclipse schedule and viewing, and the major constellations.
www.happynews.com/living/space/solar-system.htm
Lunar and Planetary Institute (LPI)@
Learn about the Lunar and Planetary Institute (LPI) in Houston, Texas, the NASA-funded research institute dedicated to studies of the solar system, its evolution, and formation. Sites feature imagery and cartographic products from missions such as Apollo, Clementine, Galileo, Viking, Voyager, and Mars Global Surveyor as well as discussion on the decision to go to the Moon.
dir.yahoo.com/.../Center_for_Advanced_Space_Studies__CASS_/Lunar_and_Planetary_Institute__LPI_
NASA Discovery Program@
Learn about the NASA Discovery Program which aims to enhance our understanding of the solar system with frequent, high quality, low cost planetary science investigations through sites featuring individual missions, newsletters, and Discovery Acquisition Program.
dir.yahoo.com/.../Missions/NASA_Discovery_Program
NASA Jet Propulsion Laboratory Solar System Dynamics Group
Generates accurate position and velocity histories (ephemerides) for the bodies of the solar system including the planets, natural satellites, comets, and asteroids.
ssd.jpl.nasa.gov
NASA: Our Solar System
Features news on the Swift spacecraft, Cassini image archive, and more.
www.nasa.gov/topics/solarsystem
NASA's Planetary Photojournal
Images of the planets, the Sun, asteroids, and comets. NASA's Photojournal provides easy access to images from various NASA Solar System exploration missions.
photojournal.jpl.nasa.gov
Open Universe
3D, realtime solar system simulator. Creates a display of planets, moons, stars, galaxies, asteroids, and spacecraft.
www.openuniverse.org
Robotic Exploration of the Solar System
Series of Scientific American reports looking at the past accomplishments and tantalizing future of unmanned space exploration.
www.scientificamerican.com/report.cfm?id=robotic-planetary-exploration
Solar System Astronomy: Our Solar System
The sun, moon, planets and asteroids.
freeware.intrastar.net/solarsystem/solarsy1.htm
Solar System Exploration - NASA [read review]
Launching pad to learning about the programs and people of this NASA space science theme.
www.solarsystem.nasa.gov/index.cfm
Solar System Live
The interactive orrery of the Web.
www.fourmilab.ch/solar/solar.html
Solar System Simulator - NASA
Simulated view of any body in the solar system from any location and time in full-color graphics. A NASA/JPL space site.
space.jpl.nasa.gov
Solar System Treasure Hunt
SPACE.com's Solar System Treasure Hunt is an interactive game that introduces players to the Earth's Solar System.
www.space.com/php/multimedia/treasurehunt
Solar System, The
Covers the historical development of our modern picture of the solar system, the planets and their moons, comets, asteroids, and meteors.
csep10.phys.utk.edu/astr161/lect/index.html
Solar Voyager
Includes links to current news articles, a description of each planet's prominent features, and a gallery of orginal art.
www.solarvoyager.com
Spacetech's Orrery: The Solar System in Action
Guide to the planets, their moons, comets, and meteors.
www.harmsy.freeuk.com/orrery.html
The Solar System
Scrolling image of the solar system in pixel scale (where one pixel is equal to 1000km) to represent its sheer vastness and the huge distances between planets.
www.troybrophy.com/projects/solarsystem
Trans-Neptunian Object - Wikipedia
Article about trans-Neptunian objects (TNO), defined as is any object in the solar system that orbits the sun at a greater distance on average than Neptune.
en.wikipedia.org/wiki/Trans-Neptunian_Objects
Views of the Solar System
Solar system learning guide for people of all ages.
www.solarviews.com
Virtual Solar System
Take a fly-by tour of the sun and each planet in its orbit.
www.nationalgeographic.com/solarsystem
Virtual Solar System UK
Learn about the nine planets through images, facts and quiz questions in this interactive tour.
www.solarsystem.f2s.com
Your Weight On Other Worlds
Ever wonder what you might weigh on Mars or the Moon? Here's your chance to find out.
www.exploratorium.edu/ronh/weight/index.html