When discussing the scale of the universe, we’re immediately faced with an intriguing question: are we tiny beings, or is the ...

“The cosmos is also within us, we're made of star-stuff. We are a way for the cosmos to know itself.” - Carl Sagan Compared to the Sun, how big is the Earth? What is a scale model and how does it help ...

Scientists have been using complicated, hypothetical particles to explain the Big Bang, but this theory posits that a simpler ...

When Earth is opposite Mars from the sun, it will appear full because you’re looking directly on the daylit side. But ...

According to the equations that govern black holes, the larger one of these cosmic behemoths is the lower its average density ...

The fact is, however, that the mass of black holes varies greatly out in the vast universe, and astronomers have recently discovered what they believe may be the biggest one ever found. They estimate ...

University of Colorado Boulder astrophysicist Jeremy Darling is pursuing a new way of measuring the universe’s gravitational wave background—the constant flow of waves that churn through the cosmos, ...

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