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2.4 billion light-years away in Abell Cluster 520, a collision of galaxies has left a huge blob of dark matter in its wake. The above picture contradicts a previous observation [...]
There is a supermoon on Saturday night
Watch the aurora live!
In this video, the sizes of planets and stars are compared with each other going all the way up to red super-giants such as Betelgeuse.
This video is a zoom into the Hubble Space Telescope infrared Ultra Deep Field, first taken in 2009. It is a very small patch of sky in the southern constellation [...]