The Hubble Classification, also known as the Hubble Sequence, is a widely recognized method for systematically categorizing ...
How it formed remains a cosmic mystery. Under the standard Hubble sequence method of classification, galaxies typically fall into one of four categories: elliptical, lenticular, spiral and irregular.
The Hubble Space Telescope has released a new image of the spiral galaxy NGC 3430, located 100 million light-years from Earth in the constellation Leo Minor. The image reveals NGC 3430 as a ...