The universe is generally referred to as infinite, unknown, and limitless. With over 2 trillion galaxies and millions of stars and planets, the universe is so enormous that it stretches the boundaries ...

It’s always amazing, and more than a little humbling, when the universe reminds us that our “common sense” is provincial, ...

Whether the universe will "end" at all is not certain, but all evidence suggests it will continue being humanity's cosmic ...

“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 ...

No one knows what kicked off the Big Bang that eventually allowed the stars to begin forming. Adolf Schaller for STScI, CC BY How can a Big Bang have been the start of the universe, since intense ...

Scientists have long been interested in the early history of the universe. Famed physicist Stephen Hawking helped popularize that the Big Bang was a singular point in time — but that's not how many ...

Dark matter, the mysterious substance that makes up roughly 80 percent of all the matter in the universe, may have been forged before our cosmos was even born. Scientists have long theorized as to ...