Saturday, April 9, 2016

Close up of the Bubble Nebula

Close up of the Bubble Nebula:

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2016 April 3


See Explanation. Clicking on the picture will download the highest resolution version available.


Close-up of the Bubble Nebula

Image Credit: NASA, ESA, Hubble Legacy Archive; Processing & License: Judy Schmidt


Explanation: It's the bubble versus the cloud. NGC 7635, the Bubble Nebula, is being pushed out by the stellar wind of massive central star BD+602522. Next door, though, lives a giant molecular cloud, visible to the right. At this place in space, an irresistible force meets an immovable object in an interesting way. The cloud is able to contain the expansion of the bubble gas, but gets blasted by the hot radiation from the bubble's central star. The radiation heats up dense regions of the molecular cloud causing it to glow. The Bubble Nebula, featured here in scientifically mapped colors to bring up contrast, is about 10 light-years across and part of a much larger complex of stars and shells. The Bubble Nebula can be seen with a small telescope towards the constellation of the Queen of Aethiopia (Cassiopeia).

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Tomorrow's picture: Seljarlandsfossian Rhapsody



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