20th Anniversary of the Brightest Supernova in Recent History

Supernova 1987A. Image Credit: HubbleOnly 20 years ago, astronomers were treated to one of the most powerful nearby explosions – a sight not seen in 400 years, before the advent of modern telescopes. What we now call Supernova 1987A detonated in the Large Magellenic Cloud providing a wealth of data for astronomers. Okay, it actually detonated 163,000 years ago, but that’s how long it took the light to reach us.
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Satellites Reveal Subglacial Streams in Antarctica

View of elevation changes of an icesheet in Antarctica. Image credit: NASAAlthough it looks ancient and unchanging, the ice sheet in Antarctica is a surprisingly active place. Deep beneath the sheet’s surface, there are waterways, channels and pipes that connect various subglacial “lakes”. These channels can cause these lakes to drain away into the ocean, or transfer water from one to the other.
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New Crater Discovered on Titan

Partial view of a crater on Titan. Image credit: NASA/JPL/SSINASA’s Cassini spacecraft captured this image of a semi-circular feature on Saturn’s moon Titan. Planetary geologists think that it might be a relatively recent impact crater on Titan. This would be surprising, since all the data gathered on Titan shows that its surface is relatively young, constantly weathered and resurfaced by weather conditions – only three impact craters have been found on Titan so far.
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