Scientists have long held that the universe is expanding at an ever-increasing rate, driven by a mysterious but measurable ...

Long ago, before galaxies formed into shapes we are familiar with today and before planets formed, the earliest stars ignited ...

Distance scales from the Planck length to a 93-billion-light-year observable universe expose extreme limits of physics and ...

A new theory claims dark matter and dark energy don’t exist — they’re just side effects of the universe’s changing forces. By ...

Astronomers spotted the largest flare ever released from a supermassive black hole as it snacked on a giant star.

A peculiar object discovered by the James Webb Space Telescope just 700 million years after the Big Bang could reveal the ...

So much happened in the earliest moments of the universe. Elementary particles appeared, the first nuclei of hydrogen and ...

How did the universe come into being? There are a multitude of theories on this subject. In a Physical Review Letters paper, three scientists formulate a new model: according to this, inflation, the ...

Ghost particles' can zoom through you without a trace. Scientists are getting to the bottom of this cosmic mystery ...

The universe's first galaxies were hot messes, according to a recent study. During their younger days, they were wild, ...

Mathematical quirks of our universe have led some cosmologists to wonder whether the cosmos was actually born in a black hole. Parallels in the physics of the universe and that of black holes have led ...

Japanese physicists have revived Kelvin’s old idea of cosmic knots, showing how these tangled fields might explain why matter ...