Scientists found where the universe’s missing matter went. Black holes have been pushing it far away from galaxies.

The early universe was already warm before reionization, revealing that the first stars did not flicker on in an icy cosmos.

When Earth is opposite Mars from the sun, it will appear full because you’re looking directly on the daylit side. But mitigating this is its far greater distance, plus the fact that Earth appears much ...

Astronomers have detected one of the darkest objects ever seen at a record cosmic distance—only with the assistance of ...

Scientists figured out that the universe is billions of years old - after years of reading ancient rocks and dying stars, and ...

Emerging evidence suggests that plate tectonics, or the recycling of Earth's crust, may have begun much earlier than ...