Space
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Space
Watching deep-space fireworks
An orbiting telescope records the universe’s most powerful explosions.
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Space
Meteorites may have sparked life on Earth
A collision of extraterrestrial objects and Earth’s ancient oceans could have produced raw materials for life.
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Space
Galaxies on the go
Millions of stars are mysteriously racing toward one point in the sky.
By Susan Gaidos -
Planets
A new look at Saturn’s rings
New information from space missions suggests Saturn's rings may be older and have more mass than scientists thought.
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Planets
The trouble with Pluto
The traditional view of the solar system is out of date. Depending on who you talk to today, the answer to how many planets there are could be eight, 12, or even 208 and counting.
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Space
The solar system’s biggest junkyard
The science of tracking millions of pieces of garbage that orbit Earth is tricky and essential.
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Planets
The two faces of Mars
A single impact might explain why the Red Planet’s surface looks smoother in the north and rugged and rocky in the south.