How do you find a galaxy that never formed? The standard cosmological model predicts the existence of “failed” galaxies — clumps of dark matter that captured gas but never birthed a star. Because they ...

The James Webb Space Telescope is finding unexpectedly many "dead" galaxies in the early universe where no stars are forming. A culprit has now been found.

Using the James Webb Space Telescope, a team of international researchers have discovered chemical fingerprints of gigantic primordial stars that were among the first to form after the Big Bang. For ...

The Pleiades (M45) is arguably the most famous star cluster in the sky. Known as the Seven Sisters, or Subaru in Japan, its history is woven into human culture, with stories about it potentially ...

For over two centuries, we have watched the red giant R Leonis dim and brighten with regularity, but this 'heartbeat' is beginning to speed up near the end of the star's life.