Articles on Galaxy

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An artist’s impression of the path of star S2 as it passes very close to the supermassive black hole at the centre of the Milky Way. The very strong gravitational field causes the colour of the star to shift slightly to the red. (Size and colour exaggerated for clarity.)
ESO/M. KornmesserJuly 27, 2018

Massive, far distant galaxies contain 100 times more gas than we thought possible.

Here, an alien crew member, Saru on Star Trek: Discovery. We often rely on science fiction to guide our expectations of alien life. We can hope lessons about accepting beings very different from yourself can be extracted by the series end.
(Courtesy of CBS Studios)October 5, 2017