Each classification done by volunteers for the Redshift Wrangler project tells us something about the distance and age of a far-away galaxy, bringing us one step closer to understanding how ...

However, in each case the galaxy classification is uncertain, or newly inspected images show evidence suggesting a later classification. Among these five objects, NGC 3720, the host galaxy of SN ...

The Hubble Classification, also known as the Hubble Sequence, is a widely recognized method for systematically categorizing galaxy morphology. Galaxies are classified into elliptical, lenticular ...

Blazars are active galaxies that emit narrow jets of ionised ... escapes the current classification. The object now known as BL Lacertae was discovered in 1929 in the background of the Lacerta ...