Explore Primer, Night Skies, and more!

Made up of rock, dust and ice, comets were formed with the rest of the solar system some 4.5 billion years ago.

Comets 101: A primer on the 'dirty snowballs' of space

Comets are the rogue cousins of our solar system family, flashing about space with brilliant tails streaming behind them.

Solar system facts and information.

4 new planets that I never knew about. Solar System Information Chart - Fast Facts about our Sun and the 8 planets plus the 5 "dwarf planets" Ceres, Pluto, Makemake, Haumea and Eris

Saturn_ Although other planets in our solar system have rings, none are as extensive and spectacular as Saturn's.

Although other planets in our solar system have rings, none are as extensive and spectacular as Saturn's. Saturn has always been my favorite planet (outside Earth)

Star Near Our Solar System May Be the Oldest Known

Star Near Our Solar System May Be the Oldest Known.The proximity of HD at 186 light-years from our solar system, made it a target of a highly precise age measurement that put it at billion years old

Moons in our solar system: I recall when I was a kid, there were 32 moons in our solar system. The answer now (2013): 146 officially, with another 25 awaiting official recognition from the IAU. A list of all of them runs down the right side of the page while the bulk of the page looks at eight of the most notable moons in the solar system. A lot of fun to research and build and -- I hope -- to read. July 10, 2013.

Moons Infographic is one of the best Infographics created in the Science category. Check out Moons now!

Giant Star Trail A new ultraviolet mosaic from NASA's Galaxy Evolution Explorer shows a speeding star that is leaving an enormous trail of "seeds" for new solar systems. The star, named Mira (pronounced my-rah) after the latin word for "wonderful," is shedding material that will be recycled into new stars, planets and possibly even life as it hurls through our galaxy.

Space Photo of the Day 2013

Giant Star Trail A new ultraviolet mosaic from NASA's Galaxy Evolution Explorer shows a speeding star that is leaving an enormous trail of "seeds" for new solar systems.

Spectacular images from the Hinode spacecraft show the solar eclipse, which darkened the sky in parts of the Western United States and Southeast Asia yesterday.

The Hinode satellite, which is in low-Earth orbit, captured these beautiful images of Sunday’s annular or ring eclipse of the sun on Sunday, May

NGC 7318 (also known as UGC 12099/UGC 12100 or HCG 92d/b) are a pair of collidinggalaxies about 300 million light-years away in the Constellation Pegasus. They are members of the famous Stephan’s Quintet. NGC 7318B has two optical arms emanating from the eastern part of the main body. Since these arms are similar morphologically to the tidal tails of merging galaxies such as NGC 4038/9,

spaceplasma: “ “ NGC 7318 (also known as UGC 12100 or HCG are a pair of collidinggalaxies about 300 million light-years away in the Constellation Pegasus. They are members of the famous Stephan’s Quintet. NGC has two optical.

Aurore Boréale, la Nuit et ses Eblouissants Spectacles de Lumière

I wish I could see these in person. Why must astronomy take years of schooling? (The best astronomy photographs of the past four years)

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