A faint glow of helium, hanging near one of the earliest known galaxies, may be the clearest sign yet that astronomers have ...

James Webb data reveal pristine gas irradiated by energetic light some 450 million years after the Big Bang — a sign it may ...

Possible evidence of the universe's first stars has been discovered thanks to the detection of an extreme helium signal.

Quantum physics once shocked scientists by revealing that particles can behave like waves—and now, that strange behavior has ...

Scientists have made the first experimental observation of matter wave diffraction in a short-lived electron-positron atom.

Max Planck Institute for Extraterrestrial Physics scientists have been able to disentangle the X-ray glow originating in our ...

Too much stress can make even a rock crack. But before rocks reach their breaking point, they "sigh" a chemical warning by ...

Students discovered an ultra-ancient star with almost no heavy elements, making it one of the most pristine ever found.

Known as Population III stars, they are made of almost pure hydrogen and helium.

After years of careful preparation and testing, NASA is finally about to send a crew of astronauts to circle the Moon.

A string of small gas clouds near the Milky Way’s central black hole has puzzled astronomers for years. Now, new observations ...

For decades, astronomers were only able to study the universe's very first stars using theoretical models. Now, observations ...