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Supermassive star exploded as a supernova millions of years ago.

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Supermassive star exploded.
Supermassive star exploded as a supernova millions of years ago.

Evidence of Past Water on Mars.

Last week, NASA announced with much fanfare that Opportunity had found evidence that the region of Mars was once drenched with water. But it turns out, NASA's other rover, Spirit, has found quietly evidence as well, but using completely different clues. The rover found cracks inside a rock dubbed "Humphrey", which look like they are minerals crystallized out of water. The amount of water that could create this is far less than the amount that acted on Opportunity's landing site, demonstrating that Mars probably had a diverse climate in the past.

Spitzer Space Telescope Looks at a Stellar Nursary.

The newly-launched Spitzer space telescope revealed the Henize 206 nebula, located 163,000 light-years away in the Large Magellanic Cloud. The nebula was created when a supermassive star exploded as a supernova millions of years ago. The star had shed layers of material over a long period, and with the force of the explosion, the material collected together to create new stars - the nebula has hundreds and possibly even thousands of young stars, which range in age from two to ten million years old.

Saturn's X-Ray Mystery.

New images of Saturn taken by the Chandra X-Ray Observatory show that X-ray emissions, which are reflected radiation from the Sun, come mainly from its equator. This is unusual, because existing theories predict that they should come from the planet's poles, as has been observed with Jupiter. Another unusual discovery is that the planet's rings aren't visible at all in the X-ray spectrum.

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