CG4: A Ruptured Cometary Globule

APOD: 2021 July 26 - CG4: A Ruptured Cometary Globule

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.

2021 July 26
The picture shows cometary globule CG4. 
Please see the explanation for more detailed information.

CG4: A Ruptured Cometary Globule
Image Credit & Copyright: Nicolas Rolland & Martin Pugh

Explanation: Can a gas cloud grab a galaxy? It's not even close. The "claw" of this odd looking "creature" in the featured photo is a gas cloud known as a cometary globule. This globule, however, has ruptured. Cometary globules are typically characterized by dusty heads and elongated tails. These features cause cometary globules to have visual similarities to comets, but in reality they are very much different. Globules are frequently the birthplaces of stars, and many show very young stars in their heads. The reason for the rupture in the head of this object is not yet known. The galaxy to the left of the globule is huge, very far in the distance, and only placed near CG4 by chance superposition.

Flemings Triangular Wisp
Crescent Neptune and Triton
 

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