Jun 13, 2001 As we study the planets, astronomers like to categorize the planets into two categories. The first category is the terrestrial planets.
wind.cc.whecn.edu/~marquard/astronomy/terrestrial.htm wind.cc.whecn.edu/~marquard/astronomy/terrestrial.htm
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The rest of the Jovian planets include Saturn, Uranus, and Neptune. Like Jupiter, these planets are gas giants. The structure and Saturn is fundamentally identical to the structure of Jupiter, although the liquid metallic hydrogen region is not as large in radius as that same region on Jupiter.
wind.cc.whecn.edu/~marquard/astronomy/jovian.htm
Encyclopedia: Terrestrial planet
Source
A terrestrial planet, telluric planet or rocky planet is a planet that is primarily composed of silicate rocks. The terms are derived from Latin words for Earth (Terra and Tellus), so an alternative d...
en.wikipedia.org/wiki/Terrestrial_planet
Comparisons between Mercury, Earth, and the Moon: Diameter, orbit, year length, day length, temperature, gravity.
www.planetary.org/explore/topics/compare_the_planets/te... www.planetary.org/explore/topics/compare_the_planets/terrestrial.html
The terrestrial planets are the four innermost planets in the solar system, Mercury, Venus, Earth and Mars.
www.solarviews.com/eng/solarsys.htm
Brief and Straightforward Guide: What is a Terrestrial Planet?
www.wisegeek.com/what-is-a-terrestrial-planet.htm www.wisegeek.com/what-is-a-terrestrial-planet.htm
The astronomers also suspect that orbital drag from abundant gas around a star may also be important for nudging rocky inner ("terrestrial") planets like Earth into relatively circular orbits as they form.
www.solstation.com/stars/jovians.htm
Terrestrial Planet Finder is a mission concept currently under study by NASA for a potential future mission suite. TPF would study all aspects of exoplanets: from their formation and development in disks of dust and gas around newly forming stars to their suitability as abodes for life.
planetquest.jpl.nasa.gov/TPF/tpf_index.html
Our understanding of the properties of terrestrial planets will be scientifically most valuable within a broader framework that includes the properties of all planetary system constituents, including both gas giant and terrestrial planets and debris disks.
planetquest.jpl.nasa.gov/TPF/tpf_what_is.cfm
Los Angeles CA (SPX) Nov 16, 2007 - Rocky terrestrial planets, perhaps like Earth, Mars or Venus, appear to be forming or to have recently formed around a star in the Pleiades (seven sisters) star cluster, the result of monster collisions of planets or planetary embryos. OUTER PLANETS...
www.spacedaily.com/reports/Planets_Forming_In_Pleiades_... www.spacedaily.com/reports/Planets_Forming_In_Pleiades_Star_Cluster_999.html
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