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Planets September 26, 2017

Saturn's surprising rings: The fascinating mysteries Cassini has solved

Since astronomer Galileo Galilei first noticed something odd about Saturn in 1610, the planet's picturesque rings have posed many fascinating puzzles.

Planets September 26, 2017

Rogue 'double planet' is actually 2 failed stars

A pair of objects drifting in interstellar space may look like a rogue "double planet," but it's actually two failed stars, a new study finds.The duo is the most lightweight binary system ever discovered and may be the closest approximation of a free-floating "double planet" that astronomers have found so far.

Planets September 26, 2017

Venus was once a cloud-covered ocean world, new evidence suggests

Today, Venus is a sweltering, desolate wasteland with temperatures topping 800 degrees Fahrenheit.

Planets September 26, 2017

Hubble Telescope detects stratosphere on huge alien planet

A huge, superhot alien planet has a stratrosphere, like Earth does, a new study suggests.

Planets September 26, 2017

Surprise! New Neptune storm appears in a bizarre location

A nearly Earth-size storm system was spotted near Neptune's equator, surprising scientists because no bright clouds have ever been seen in that location.

Planets September 26, 2017

Pluto probe may get 2 objects for price of 1 during next flyby

NASA's New Horizons spacecraft may double its pleasure during its next deep-space flyby 16 months from now.

Planets September 26, 2017

Life in the Saturn system? Cassini has shown it's possible

The complex choreography of Saturn's numerous moons displays beautiful physics, but only a few of the worlds may be friendly to life.

Planets September 26, 2017

Some alien planets may bypass habitability

Earth's orbit within the sun's habitable zone means its temperatures are just right for life.

Spaceflight September 25, 2017

Cassini Saturn probe preps for last hurrah

After orbiting Saturn for more than 13 years, NASA's Cassini spacecraft is getting ready to say goodbye.

NASA September 25, 2017

Proposed orbiter could probe the ocean beneath Saturn's moon Titan

When NASA's Cassini mission arrived at Saturn, it pressed through the haze surrounding the ringed planet's largest moon, Titan, to reveal a complex, liquid-covered world with the potential to support life.

Planets September 25, 2017

Saturn moon Tethys shines above rings in gorgeous photo

Saturn's icy moon Tethys hovers above the planet's iconic rings in a breathtaking photo by NASA's Cassini spacecraft.