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Author:
NASA
Gravitation is the force of attraction that acts between all objects because of their mass. An object's...
Type: Reference Material
Date Added: Jul 08, 2009
Date Modified: Jul 08, 2009
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Author:
NASA
The Hubble Space Telescope is a powerful orbiting telescope that provides sharper images of heavenly...
Type: Reference Material
Date Added: Jul 08, 2009
Date Modified: Jul 08, 2009
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Author:
NASA
The International Space Station is a large, inhabited Earth satellite that more than 15 nations are...
Type: Reference Material
Date Added: Jul 08, 2009
Date Modified: Jul 08, 2009
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Author:
NASA
Mars is the fourth planet from the sun. The planet is one of Earth's "next-door neighbors" in space....
Type: Reference Material
Date Added: Jul 08, 2009
Date Modified: Jul 08, 2009
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Author:
NASA
Mercury is the planet nearest the sun. It has a diameter of 3,032 miles (4,879 kilometers), about...
Type: Reference Material
Date Added: Jul 08, 2009
Date Modified: Jul 08, 2009
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Author:
NASA
A meteor is a bright streak of light that appears briefly in the sky. Observers often call meteors...
Type: Reference Material
Date Added: Jul 08, 2009
Date Modified: Jul 08, 2009
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Author:
NASA
Moon is Earth's only natural satellite and the only astronomical body other than Earth ever visited by...
Type: Reference Material
Date Added: Jul 08, 2009
Date Modified: Jul 08, 2009
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Author:
NASA
A nebula (NEHB yuh luh) is a cloud of dust particles and gases in space. The term nebula comes from the...
Type: Reference Material
Date Added: Jul 08, 2009
Date Modified: Jul 08, 2009
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Author:
NASA
Neptune is one of the two planets that cannot be seen without a telescope. The other is Pluto. Neptune is...
Type: Reference Material
Date Added: Jul 08, 2009
Date Modified: Jul 08, 2009
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Author:
NASA
Pluto, (PLOO toh), is a dwarf planet that orbits far from the sun. It shares the region of its orbit,...
Type: Reference Material
Date Added: Jul 08, 2009
Date Modified: Jul 08, 2009
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