Add Yahoo as a preferred source to see more of our stories on Google. Dark energy is one of the most mysterious concepts in all of the cosmos. We know very little about what it is but it just might ...

We know how the universe began. An event we call the Big Bang started it all about 13.8 billion years ago. How the universe ends, though, is an open question. The path forward depends on the ...

Andromeda and the Milky Way merge. NASA; ESA; Z. Levay and R. van der Marel, STScI; T. Hallas; and A. Mellinger Share Curious Kids is a series for children of all ages. If you have a question you’d ...

For centuries, people have looked to the stars, asking how it all began—and how it might end. Now, thanks to a bold new study by physicists from Cornell University, Shanghai Jiao Tong University, and ...

“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 ...