A massive survey captured over 1,200 stellar flares, showing which red dwarf stars erupt most and how flare activity declines ...

Stellar streams are trails of stars that astronomers can study to solve mysteries about the history of our Milky Way galaxy ...

Astronomers have identified dozens of stellar streams in the Milky Way, offering clues about the galaxy’s structure and ...

Astronomers have finally cracked a decades-old mystery about red giant stars—how material from their deep interiors makes its ...

Using the Mayall 4-meter telescope at Kitt Peak National Observatory, an international team of astronomers has observed ...

Visible to the naked eye in the constellation Cassiopeia, the star γ Cas has puzzled astrophysicists for half a century. It ...

Stellar astronomy and planetary systems form a cornerstone of astrophysical research, uniting our understanding of the life cycles of stars with the intricate architecture of the systems that form ...

Researchers have uncovered evidence for our sun joining a mass migration of similar "twins" leaving the core regions of our ...

New high-resolution simulations reveal that stellar rotation plays a crucial role in transporting material inside red giant stars.

Aliens may have been trying to contact humans for years, suggests new research. But stellar “space weather” could mean radio signals from friendly extraterrestrial intelligence get lost in space, say ...

Eliza Frankel, a University of Wyoming physics and astronomy Ph.D. student, poses with her award-winning poster at a meeting of the American Astronomical Society in Phoenix, Ariz. in early January.

Chapter I: Introduction: the dawn of astronomy -- Chapter II: The earth -- Chapter III: Tools and methods -- Chapter IV: The sun -- Chapter V: The moon -- Chapter VI: Eclipses and tides -- Chapter VII ...