The Hinode mission is going to tell us much about how the atmosphere of the sun is produced and how it evolves, says solar physicist George Doschek. Hear more about Hinode, a space observatory pointed at our sun.

In the 1970s, Voyager 1 provided the first close-up views of Saturn's rings, and determined that the rings formed about 100 million years ago. But evidence from the more recent Cassini mission suggests the rings are much older. Read more about how Saturn recycles its rings.

Trying to determine the location of the Milky Way would be like trying to find your way across a terrain where the landmarks aren't where they appear to be!

Nina Amatulli, in the second grade at The American School in Japan, asks the scientists why Earth is the only place with life. Hear the response from Robert Hazen of the Carnegie Institution For Science.

As seen from the moon, the Earth waxes and wanes - just as the moon does as seen from our world.

John Mather talks about the James Webb Telescope. It should help answer many questions people want to know about the universe. Read more.

More than 70 percent of all energy in our universe is thought to be dark energy. But - though theoretical models say it should exist - astronomers have yet to detect dark energy. How astronomers are trying to solve one of the greatest scientific mysteries of our time.

Dense pools of dark matter are yanking on galaxies deep in space. Astronomer Catherine Heymans talks about mysterious force of dark matter.

In the far future, a giant cloud of hydrogen will collide with our Milky Way galaxy and help create thousands of new stars.

Astronomers have identified the telltale sign of a possible hypernova - a huge stellar explosion - in one of our galaxy's oldest stars.