Space

Outer space represents a challenging environment for human exploration because of the dual hazards of vacuum and radiation. Microgravity also has a negative effect on human physiology that causes both muscle atrophy and bone loss. In addition to these health and environmental ...

Santa Ana Volcano Erupts in El Salvador

Santa Ana Volcano Erupts in El Salvador

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New World - Hypothetical Planet Around a Cool Star

New World - Hypothetical Planet Around a Cool Star

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Young Stars in the Small Magellanic Cloud, NGC 346

Young Stars in the Small Magellanic Cloud, NGC 346

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Crescent Earth Rises Above the Lunar Horizon, Apollo 17

Crescent Earth Rises Above the Lunar Horizon, Apollo 17

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Mountains of Creation, Spitzer Space Telescope

Mountains of Creation, Spitzer Space Telescope

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Seven Sisters Pleiades Star Cluster (M45)

Seven Sisters Pleiades Star Cluster (M45)

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A Tectonic Feast on Icy Surface of Enceladus

A Tectonic Feast on Icy Surface of Enceladus

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Possible Scene from a Moon of the Extrasolar Jupiter-like Planet, HD23079

Possible Scene from a Moon of the Extrasolar Jupiter-like Planet, HD23079

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A Clear View of the Alps and Apennines from Space

A Clear View of the Alps and Apennines from Space

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Alien World, Gas-Giant Exoplanet Space Art

Alien World, Gas-Giant Exoplanet Space Art

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Dust and the Helix Nebula (NGC 7293)

Dust and the Helix Nebula (NGC 7293)

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Mt. Everest, the Tallest Mountain in the World

Mt. Everest, the Tallest Mountain in the World

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Purple Haze in Abell 1689, Massive Cluster of Galaxies

Purple Haze in Abell 1689, Massive Cluster of Galaxies

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The Eagle Nebula Star Cluster (Messier 16)

The Eagle Nebula Star Cluster (Messier 16)

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Milky Way Galaxy Top View

Milky Way Galaxy Top View

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