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Recent Podcast
Space Scoop: Archaeologists of the Universe
Space Scoop: Archaeologists of the Universe
This picture shows the aftermath of a collision between two huge groups of galaxies, which are called galaxy clusters. (2014-08-19)


DEM L50 in 60 Seconds

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Narrator (April Hobart, CXC): DEM L50 is what astronomers call a superbubble. These objects are found in regions where massive stars have formed, raced through their evolution, and exploded as supernovas. Winds from the massive stars and shock waves from the supernovas carve out huge cavities in the gas and dust around them, creating superbubbles. This composite contains X-rays from Chandra and optical data from ground-based telescopes. The superbubble in DEM L50 is giving off about 20 times more X-rays than expected by standard models. Researchers think that supernova shock waves striking the walls of the cavities and hot material evaporating from the cavity walls may be responsible for this additional X-ray emission.

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