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Meteor Showers 2015 Guide Dates Shooting Stars Comets Leonids - The Old Farmer's Almanac
Meteor Showers Guide 2015 with dates and viewing tips from The Old Farmer's Almanac.
https://www.almanac.com/content/meteor-showers-guide
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When is our Next Great Comet? - EarthSky
The Southern Hemisphere has had two Great Comets recently - McNaught in 2007 and Lovejoy in 2011. When will the Northern Hemisphere get one?
http://earthsky.org/space/northern-hemisphere-overdue-for-a-great-comet
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Solar System Exploration: Asteriods - NASA
Asteroids are rocky, airless worlds that orbit our sun, but are too small to be called planets. Tens of thousands of these minor planets are gathered in the main asteroid belt, a vast doughnut-shaped ring between the orbits of Mars and Jupiter. Asteroids that pass close to Earth are called near-earth objects.
http://solarsystem.nasa.gov/planets/asteroids
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Comets General Information - NASA
NSSDCA Lunar and Planetary Science: Comets Page.
http://nssdc.gsfc.nasa.gov/planetary/planets/cometpage.html
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Asteroids - Facts and Information about Asteroids
Asteroids are small, airless rocky worlds that revolve around the sun and are too small to be called planets. They are also called space rocks, planetoids or minor planets.
http://www.space.com/51-asteroids-formation-discovery-and-exploration.html
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Comets Facts, Pictures and Information - Nine Planets
Unlike the other small bodies in the solar system, comets have been known since antiquity. There are Chinese records of Comet Halley going back to at least 240 BC.
http://nineplanets.org/comets.html
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Comets: Facts About The 'Dirty Snowballs' of Space
Learn about the composition and orbit of comets, as well as the history of their discovery, famous comets and space missions to analyze them.
http://www.space.com/53-comets-formation-discovery-and-exploration.html
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Comet - Wikipedia, the Free Encyclopedia
A comet is an icy small Solar System body that, when passing close to the Sun, heats up and begins to outgas, displaying a visible atmosphere or coma, and sometimes also a tail. These phenomena are due to the effects of solar radiation and the solar wind upon the nucleus of the comet.
https://en.wikipedia.org/wiki/Comet
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Asteroid - Wikipedia, the Free Encyclopedia
Asteroids are minor planets, especially those of the inner Solar System. The larger ones have also been called planetoids. These terms have historically been applied to any astronomical object orbiting the Sun that did not show the disc of a planet and was not observed to have the characteristics of an active comet.
https://en.wikipedia.org/wiki/Asteroid
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Comets, Awesome Celestial Objects - Astronomy Today
Comets are nebulous celestial bodies orbiting the sun. A comet is characterised by a long, luminous tail, but only in the segment of the comet's orbit when it passes closest to the sun.
http://www.astronomytoday.com/astronomy/comets.html
