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 ...

Test Your Solar System Smarts From white dwarfs to space junk, our solar system is filled with mysterious and often mind-blowing phenomena. Do you know asteroids from meteoroids and Venus from ...

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 ...

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 ...

With a radius of 2,106 miles, Mars is the seventh largest planet in our solar system and about half the diameter of Earth. Its surface gravity is 37.5 percent of Earth’s. Mars rotates on its ...

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 ...

Total solar eclipses aren't something you see ... So, I contacted Babak Tafreshi, a National Geographic photographer who has been snapping eclipse shots for 30 years. With Tafreshi's advice ...

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. This image ...