Most stars are main sequence stars that fuse hydrogen to form helium in their cores - including our sun. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...

For a star, its initial mass is everything. It determines how quickly it burns through its hydrogen and how it will evolve once it starts fusing heavier elements. It’s so well understood that ...

Blue straggler stars are the weird grandparents of the galaxy: They should be old, but they act young. Finding and studying these strange stars helps us understand the complicated life cycles of ...

This is a preview. Log in through your library . Abstract We present an analysis of the effects of stellar activity on photospheric absorption lines. High-resolution echelle spectra, including nearly ...

Comet 3I/ATLAS is the third ISO ever detected. It was discovered by the Asteroid Terrestrial-impact Last Alert System (ATLAS) station on 1 July 2025. It's traveling through the inner solar system at ...

Learn how many suns exist in the Milky Way and how to understand how many sun-like stars are out there could help us ...

This image from the ALMA telescope shows star system HD101584 and the complex gas clouds surrounding the binary. It is the result of a pair of stars sharing a common outer layer during their last ...