Paul Sutter

In the early universe, gravity may have been capable of creating light, a new theoretical paper finds.

Astronomers have a plan for using ripples in space-time to hunt for elusive intermediate-mass black holes around the Milky Way's center.

A new 13-sided shape is the first example of an elusive "einstein" — a single shape that can be tiled infinitely without repeating a pattern.

What's the biggest black hole in the universe, and is there a limit to how big black holes can get?

Within a month of the Big Bang, a second cosmic explosion may have given the universe its invisible dark matter, new research suggests.

The universe may be flat, but could still be shaped like a doughnut, weird patterns in leftover light from the Big Bang suggest.

Scientists have proposed a way that the universe could stop expanding, ending in a 'Big Crunch' that resets space and time as we know it.

When the universe's first stars emerged from the cosmic dark ages, they ballooned to 10,000 times the mass of Earth's sun, new research suggests.

Intergalactic gas clouds are slightly hotter than they should be, new research claims, and theoretical particles called 'dark photons' could explain it.

Early life made an inhospitable Earth more habitable, and aliens could be doing the same thing on their worlds, new research proposes.

These hypothetical stars are the densest objects in the universe that can exist without becoming full-fledged black holes.

In quantum physics, particles exist in many states at once until you measure them. Can reality really work that way?

In some interpretations of quantum mechanics, such as the Many-Worlds interpretation or the Pilot Wave Theory, parallel universes may form every time a subatomic particle goes through any interaction.

A wild theory suggests that consciousness may explain quantum mechanics, by forcing the subatomic particles to choose one concrete outcome.

What lurks at the center of a black hole? Studying the space-time ripples from black hole collisions could reveal an answer.

Our 13 billion-year-old galaxy has gone through many growing pains — usually to the detriment of its smaller neighbors.

Most matter in the universe cannot be seen — but its influence on the largest structures in space can.

Short answer: We don't really know how the universe was created, though most astrophysicists believe it started with the Big Bang.

Black holes go boom in several ways.

A team of physicists has found that the remnant of a neutron star merger observed in 2019 has just the right mass to be a strange hypothetical quark star.

Dark energy could be caused by pressure from giant voids of nothingness that may be flinging the universe apart.