What is the origin of the letters used in star classification? Why didn't astronomers use ABCD? J. HaldimanChicago, Illinois ...

The James Webb Space Telescope is now delivering what astronomers have chased for decades: a glimpse of the universe’s first generation of stars. By dissecting the light from a tiny, distant galaxy, ...

A paper links dark stars to Webb telescope puzzles involving bright sources, dust-free galaxies, and early black holes.

A team of astronomers have created the first standardized set of measurement guidelines for analyzing and cataloguing stars. Previously, as with the longitude problem 300 years earlier for fixing ...

This month, we’ll talk about the relationship between a star’s spectral class and its color. But first, I have a question for you: Which constellation has the most stars of spectral class K9? The ...