News tagged with arms

Spirals in a galaxy may arise from density waves

It's often said that the shape of a spiral galaxy follows the curve of a golden spiral. You can see this, for example, in the image above. While it's often implied that this curve matches exactly, that isn't the case. The ...

dateOct 09, 2014 in Astronomy
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Image: Alexander Gerst conducts spacewalk

ESA astronaut Alexander Gerst spent six hours and 13 minutes outside the International Space Station with NASA astronaut Reid Wiseman on Tuesday, 7 October 2014. This was the first spacewalk for both astronauts but they performed ...

dateOct 08, 2014 in Space Exploration
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Alexander Gerst set for spacewalk

ESA astronaut Alexander Gerst has spent four months in the relative safety of the International Space Station but on Tuesday he will venture into open space with NASA astronaut Reid Wiseman on a seven-hour spacewalk.

dateOct 03, 2014 in Space Exploration
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