File:IC 4955 (noao-ic4955block).jpg

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Captions

Captions

These two nebulae, IC 4954 and IC 4955, are part of a much larger complex of newly formed stars. This much larger cluster is called Roslund 4 and astronomers estimate that the stars found here are 4 million years old.

Summary

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Description
English: These two nebulae, IC 4954 and IC 4955, are part of a much larger complex of newly formed stars. This much larger cluster is called Roslund 4 and astronomers estimate that the stars found here are 4 million years old. The very sharp boundary (shock front) between some of these stars and the molecular cloud serves as a chronometer for the cluster. It is unlikely that a structure like this, caused by the outflow of these energetic young stars, would persist for timescales longer than 6 million years. It is estimated that this star forming region is 6,000-8,000 light years away.This image was taken as part of Advanced Observing Program (AOP) program at Kitt Peak Visitor Center during 2014.
Date 7 June 2014, 09:25:00 (upload date)
Source IC 4955
Author KPNO/NOIRLab/NSF/AURA/Adam Block
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current17:25, 23 October 2023Thumbnail for version as of 17:25, 23 October 20231,441 × 972 (570 KB)OptimusPrimeBot (talk | contribs)#Spacemedia - Upload of https://noirlab.edu/public/media/archives/images/large/noao-ic4955block.jpg via Commons:Spacemedia

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