The Sun is very much a main sequence star, in the G-type category (G2V to be precise). It’s been fusing hydrogen for 4.6 billion years, but it still has almost three times as much as it has helium.

"The formation of planetary systems is not exclusive to stars but might also work around lonely starless worlds." ...

That prompted three astrophysicists (Isabelle John, Rebecca Leane, and Tim Linden) to try to look at things in an organized fashion, modeling a "dark main sequence" of stars as they might exist ...

While our Sun is considered a main sequence star that is “alive” given its active fusion process that converts hydrogen into helium, white dwarf stars are considered “dead” stars as they have ...

The First Catalog of Candidate White Dwarf–Main-sequence Binaries in Open Star Clusters: A New Window into Common Envelope Evolution. The Astrophysical Journal, 2024; 976 (1): 102 DOI: 10.3847 ...

A recent breakthrough in astronomy has illuminated the mysterious dynamics of a binary star system, HD 135344 AB, where a giant planet was discovered orbiting the primary star— a star that had ...

These infant stars, or "protostars," continue to gather matter from their prenatal envelope of gas. Eventually, what is left behind is a main sequence star surrounded by a flattened, swirling ...