When we go backwards in time through the history of the cosmos, the distances and volumes shrink, while the average energy ...

The early universe started with what we call The Big Bang, which was a very hot environment which then expanded and cooled.

Roughly 400,000 years after the Big Bang, the universe cooled just enough to allow photons to escape from the primordial ...

Astronomers have identified three ultra-massive galaxies -- nearly as massive as the Milky Way -- already in place within the first billion years after the Big Bang. This surprising discovery was made ...

Time For Reflection Our understanding of the universe, as advanced as it is, is still riddled with paradoxes and huge ...

The Big Bang theory suggests that the universe began as a hot, dense point, expanding into the cosmos we observe today.

An international team of astronomers has identified three ultra-massive galaxies—each nearly as massive as the Milky ...

Our knowledge of physics — gained through astrophysical experiments, or in laboratories via machines such as particle ...

Our most powerful telescopes have revealed that the cosmos is surprisingly simple on the largest visible scales. Likewise, ...

A radical hypothesis suggesting black holes could be behind the accelerating expansion of our universe has been stirring up ...

When the two neutron stars collide, the initial kilonova of exploded neutron star guts is extremely hot, billions of degrees, ...

"This is very likely to bring us closer to discovering the true nature of dark energy. Perhaps it will also bring us closer ...