"This is a condensed edition of Welcome to the Universe - essentially a pocket-sized version of the original "astrophysical tour" of the cosmos. In 8 chapters (compared to the original 24 chapters), ...

Is the universe infinite? It's one of the most profound questions we can ask, and here's the short answer: We don't know. While we have learned a great deal about the universe, a portion of the cosmos ...

After a century of observations spanning the breadth of the cosmos and theoretical insights that push humanity's vision of the universe to its utmost limits, we can finally, confidently say that the ...

This article was originally published at The Conversation. The publication contributed the article to Space.com's Expert Voices: Op-Ed & Insights. About a century ago, scientists were struggling to ...

About a century ago, scientists were struggling to reconcile what seemed like a contradiction in Albert Einstein's theory of general relativity. Published in 1915, and already widely accepted ...

If you’re having trouble sleeping at night, have you tried to induce total existential dread by contemplating the end of the entire Universe? If not, here’s a rundown of five ideas exploring how “all ...

Whether the universe will “end” at all is not certain, but all evidence suggests it will continue being humanity’s cosmic home for a very, very long time. Our understanding of the future of the ...