The atmosphere, a thin veil of molecules enveloping Earth, reaches about 20 miles (32 kilometers) above the planet's surface. It contains countless air particles, invisible to the naked eye, yet ...

Could time itself actually explain our universe's expansion? Our current cosmological model—known as lambda cold dark matter, ...

Engaging articles, breathtaking images and expert knowledge Issues delivered straight to your door ...

By looking at light from distant exploding stars called supernovas, in 1998 astronomers discovered the universe isn’t just ...

Galaxies in the early universe tend to be clumpy, but the new JWST discovery of a "grand design" spiral galaxy just 1.5 ...

"Dark energy is a misidentification of variations in the kinetic energy of expansion, which is not uniform in a Universe as ...

Explore 10 mind-blowing theories about what lies beyond the universe, from the multiverse and higher dimensions to the mysteries of dark energy and cosmic bubbles.

For a century, scientists have thought that the universe was expanding in all directions. To make that assumption work, astronomers have used the concept of dark energy. Dark energy cannot be seen ...

This late-time acceleration was discovered in 1998 by two teams of astronomers making distance measurements using supernovas ...

Prof. Wendy Freedman, one of world’s leading cosmologists, has been awarded the National Medal of Science, the country’s ...