This story appears in the July 2013 issue of National Geographic magazine ... unaltered material that everything formed from in the solar system.” Comet DustIn a NASA clean room a scientist ...

Though costly to implement, solar energy offers a clean, renewable source of power. 3 min read Solar energy is the technology used to harness the sun's energy and make it useable. As of 2011 ...

The perfect gift for the history buff in your life. Give now and get a FREE TOTE BAG.

This story appears in the September 2009 issue of National Geographic ... has invested heavily in solar power. None of those plants yet include a storage system. Since photovoltaics produce ...

This story appears in the November 2015 issue of National Geographic magazine ... is perhaps the strongest incentive for leasing a solar system. Shiv Kumar, a 20-year-old laborer in Madhotanda ...

In 1986, humanity got its first close look at Uranus's secrets thanks to the Voyager 2 probe. After a lengthy journey, this ...

This story appears in the July 2015 issue of National Geographic magazine ... encounter will unveil the last of the classical solar system’s unexplored worlds. We’ll finally get to meet ...

They are stored in the Oort cloud, a huge, diffuse sphere of cometary nuclei in the far reaches of the solar system. Close to the sun, yet still beyond Neptune, circle what may well be their ...

Need a new idea to keep kids entertained? Try stargazing. Free learning activities and videos about the solar system Free learning activities and videos about the solar system Free learning ...

Is there a 9th planet out there? We may soon find out. Earth is a geological oddball in our solar system. This is why. Earth is a geological oddball in our solar system. This is why. How to see ...