As long as this is the primary thing a star is doing, it’s considered to be on the main sequence. As a star runs out of ...

Fluffy strands of cosmic gas and dust illuminated by bright young stars form a beautiful cloudscape in a neighboring nebula.

New research led by W. M. Keck Observatory Instrument Scientist and astronomer Grant Hill has confirmed what scientists have long suspected—WR 104 comprises two massive stars: a Wolf-Rayet star and an ...

leading to a state of equilibrium between gravitational collapse and the energy released during fusion Key fact In a main sequence star, hydrogen nuclei fuse together to form helium nuclei.

More massive stars than the Sun have a very different life cycle and follow the right hand path in the diagram above: \({Nebula}\rightarrow{protostar}\rightarrow{main~sequence~star}\rightarrow{red ...