Scientists have turned up rare evidence that space-time is smooth as Einstein predicted, while pushing closer to a complete theory of gravity. From NASA Goddard Space Flight Center, Fermi Gamma Ray Space Telescope.

Check out the unusual visual style in this adaptation of the ground-breaking "Science on a Sphere" production, including depictions of Earth. From NASA and NOAA, with additional images from ESA Hubble.

This video explores the upheaval in our understanding of the universe brought on by the discovery that the universe is not just expanding, but is accelerating outward at an ever increasing pace. Was Einstein wrong? Are we missing something crucial in our understanding of how it all began? Either ...

Astronomy is big science. It's a vast Universe out there, and the exploration of the cosmos requires huge instruments.

This is the 5-meter Hale reflector on Palomar Mountain. When the European Southern Observatory came into being, fifty years ago, it was the largest telescope in the world. ES...

This video features answers to questions submitted by the public. What is the most empty spot of space you have ever seen? What's the longest single-shot exposure ever recorded of any object or area of space by Hubble? What are the farthest objects discovered by Hubble? From HubbleCast.

The concept of infinity drove many ancient Greek mathematicians and scholars crazy. Find out why.

Here is one of the most well known paradoxes of the concept of infinity. It goes back to the Greeks.

Amazing time-lapse images of the Milky Way as seen from pristine skies in the southern hemisphere.

What if we could see the universe as a whole? We've been trying to see and describe the large scale shape and structure of the universe since the dawn of science. Now, with powerful telescopes and supercomputers we have what earlier generations might have thought was a truly "God's Eye" view of c...

Science has known since the late 1990s that the universe is accelerating outward. That means it will continue to dissipate on into the future through a number of well defined epochs. A large international collaboration called the Galaxy and Mass Assembly Project (GAMA) has been surveying deep reg...

Scientists have created an important new simulation of cosmic evolution. It takes place in a virtual cube 350 million light-years squared, and spans a time period from 12 million years after the Big Bang to the present day, or around 13 billion years' worth of cosmic evolution.

How heat and light are produced by fusion reactions inside the sun, and how they exit its surface and travel across the solar system.