Hubble peers at a distinctly disorganized dwarf galaxy
|UGC 4459 [Credit: ESA/Hubble and NASA; |
Acknowledgement: Judy Schmidt]
Rich with young blue stars and older red stars, UGC 4459 has a stellar population of several billion. Though seemingly impressive, this is small when compared to the 200 to 400 billion stars in the Milky Way!
Observations with Hubble have shown that because of their low masses of dwarf galaxies like UGC 4459, star formation is very low compared to larger galaxies. Only very little of their original gas has been turned into stars. Thus, these small galaxies are interesting to study to better understand primordial environments and the star formation process.
Source: NASA [April 02, 2016]