Cosmology

Recent observations show that some white dwarf stars suddenly stop cooling. Now, scientists propose a 'fountain of youth' mechanism that may explain how these stellar husks avoid death for billions of years.

A stunning new map of the magnetic fields at the Milky Way's center charts never-before-seen features, and raises new questions about how our galaxy's central engine works.

The ancient obect Gz9p3, which appeared as a single point of light through the Hubble Space Telescope, is actually one of the most enormous galaxies in the early universe, James Webb Space Telescope observations reveal.

Two new James Webb Space Telescope images show off massive bubbles carved out of a stellar nursery by giant, baby stars growing in a nearby galaxy.

Astronomers have taken the most detailed image of the Vela supernova remnant ever. The stunning, 1.3-gigapixel image is also the largest ever released from the Dark Energy Camera.

A nova outburst visible to the naked eye is expected to decorate the night sky this year with a "new star" that will briefly become as bright as the North Star, offering a once-in-a-lifetime stargazing opportunity.

Complex organic molecules spotted by the James Webb Space Telescope may hint at how habitable planets form.

Depending on where we look, the universe is expanding at different rates. Now, scientists using the James Webb and Hubble space telescopes have confirmed that the observation is not down to a measurement error.

The James Webb Space Telescope zoomed in on galaxy GN-z11, which existed just 430 million years after the Big Bang, to reveal what may be some of the oldest stars in the universe.

Astronomers using the James Webb Space Telescope have detected the oldest "dead" galaxy ever observed, at just 700 million years after the Big Bang. The stalled-out relic defies explanation by our current knowledge of the early cosmos.