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Kepler Discoveries: A Search For Habitable Planets - NASA
A list of planets discovered by Kepler.
http://kepler.nasa.gov/Mission/discoveries
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15 Fascinating Planets Outside Our Solar System - Listverse
Exoplanets or "extrasolar planets" are planets found outside our solar system. They are designated by affixing a lowercase letter, starting from "b" towards "z" depending on order of discovery, to their parent star's Flamsteed designation or catalogue numbers.
http://listverse.com/2010/01/25/15-fascinating-planets-outside-our-solar-system/
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The Extrasolar Planet Encyclopaedia - Exoplanet
World's most comprehensive interactive database of extrasolar planets updated daily since 1995. Main catalog page with extrasolar planet systems that contain total known planets.
http://exoplanet.eu/catalog/
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Extrasolar Planets, Astronomy - Britannica
Any planetary body that is outside the solar system and that usually orbits a star other than the Sun. The first extrasolar planets were discovered in 1992.
http://www.britannica.com/topic/extrasolar-planet
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Extrasolar Planets - The Planetary Society
Extrasolar planets being discovered by Kepler and the world's great telescopes.
http://www.planetary.org/explore/space-topics/exoplanets/?referrer=https://www.google.com
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Lists of Planets - Wikipedia, the Free Encyclopedia
For a list of planets in the Solar System, see: List of gravitationally rounded objects of the Solar System.
https://en.wikipedia.org/wiki/Lists_of_planets
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Atmosphere of the Planets - Universe Today
We take our atmosphere on Earth for granted; it's all around us. But spend a second on any other planet in the Solar System and you'll realize just how good we have it on Earth.
http://www.universetoday.com/35796/atmosphere-of-the-planets/
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What is a Planet? - NASA
Technically, there was never a scientific definition of the term Planet before 2006. When the Greeks observed the sky thousands of years ago, they discovered objects that acted differently than stars.
http://missionscience.nasa.gov/nasascience/what_is_a_planet.html
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Planets, Planets Information, Facts, News, Photos - National Geographic
Get information, facts, photos, news, videos, and more about planets and their moons from National Geographic.
http://science.nationalgeographic.com/science/space/planets/
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Planet - Wikipedia, the Free Encyclopedia
The term planet is ancient, with ties to history, science, mythology, and religion. Several planets in the Solar System can be seen with the naked eye. These were regarded by many early cultures as divine, or as emissaries of deities. As scientific knowledge advanced, human perception of the planets changed, incorporating a number of disparate objects.
https://en.wikipedia.org/wiki/Planet
