space

Astronaut Scott Kelly was brought safely home last night after spending nearly a year in space. He was primarily in space to study himself to learn about how human bodies change in space. He even has an identical twin who stayed back on Earth to compare results. But what else was he doing for so long up on the International Space Station? He actually kept a pretty good record on Twitter.

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space science image The Hubble Took an Image of a 'Blue Bubble' That Is Actually a Nebula
Via: @NASA
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The Hubble Space Telescope took this image of a star that looks like it's inside a blue bubble. NASA says the blue bubble is actually a nebula formed around 20,000 years ago. This is how it's described on the Hubble's website:

The distinctive blue bubble appearing to encircle WR 31a is a Wolf–Rayet nebula — an interstellar cloud of dust, hydrogen, helium and other gases. Created when speedy stellar winds interact with the outer layers of hydrogen ejected by Wolf–Rayet stars, these nebulae are frequently ring-shaped or spherical.


According to NASA, these type of stars don't last very long (in terms of bodies in space at least). It'll only be around for a "few hundred thousand years".


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