Here, Space.com explores some of the biggest space mysteries currently perplexing scientists. In the early 20th century, astronomer Edwin Hubble discovered that the universe is expanding ...

Galaxies are astronomical objects composed of billions or even trillions of stars. Our Earth and solar system are just a tiny ...

Since its origin in the big bang 13.8 billion years ago, the cosmos has unfurled a story of majesty and wonder. There's much we think we grasp, but so much more that leaves us in the dark. In this ...

Finding extraterrestrial life remains one of humanity’s greatest mysteries. The Big Bang created ... Since 1998, we’ve known the Universe’s expansion is accelerating. Dark energy likely ...

There's a significant imbalance between matter and antimatter in our universe, but a strange particle ... path to solving a number of cosmological mysteries. Editor's note: This article was ...

It's been a long, strange trip for this universe we call home. Follow its development and take a peek at what's ahead with the Mysteries of Deep Space interactive timeline. Simply click on the ...

and hauled into Fermi National Accelerator Laboratory in Batavia — to explain the universe’s mysteries. Scientists will try to solve puzzles like why post-Big Bang matter conquered antimatter ...

Mind-blowing. Those are the two words I'd use to describe the "Mysteries of the Universe" weekender discovery tour, hosted by New Scientist. Over two days in the Cheshire countryside, a group of ...

William Shatner explores the Earth and beyond, in search of the universe's most fascinating, strange and inexplicable mysteries. Examines unidentified objects witnessed by military pilots ...

Some of what keeps us human is to be outside on a dark night, gazing up at stars and galaxies and simply wondering. The post ...