White circular smudge or reddish background.

Video: 15 years of Mars images

ESA’s Mars Express spacecraft began sending back images from its orbit around Mars in January 2004. Take 5 minutes to see some of the coolest images of the mission so far.

Here’s how Titan looks in infrared

Saturn’s largest moon Titan is enveloped in a thick atmosphere, but the infrared camera on the Cassini spacecraft was able to reveal the moon’s myriad of surface features.

Illustration of an astronaut floating in a dark sky with a dark blue whirlpool in the background.

Rotating black holes as portals for hyperspace travel

One of the most cherished science fiction scenarios is using a black hole as a portal to another dimension or time or universe. Is it possible? Maybe. But choose carefully. All black holes are not created equal.

Artist's illustration of a Fast Radio Burst.

A 2nd repeating radio burst from the depths of space

Of the more than 60 Fast Radio Bursts found so far, only one has ever been seen to repeat from the same source … until now.

Citizen scientists discover rare exoplanet

Last week, citizen scientists with Zooniverse’s Exoplanet Exoplorers announced K2-288Bb – a type of exoplanet considered rare so far. The finding might shed new light on how planets form.

Blown-up image of a very distant galaxy, with the location of the flare-up indicated by tick marks.

Holy cow! Astronomers puzzle over a mysterious blast

Astronomers are arguing over a brief and unusual flash in the night sky from earlier this year. The call it the Cow. One group argues it was a monster black hole shredding a passing star. The other argues it might have been a black hole being born.

Primitive life at Barnard’s Star?

Barnard b is one of the nearest planets to our sun at only 6 light-years away. But its host star is dim. Can life find a way on such a cold planet?

Light blue sphere with darker blue center.

Thousands of stars, including our sun, destined to turn into crystals

Astronomers now have the 1st direct evidence that white dwarf stars form crystal cores. Our sun is destined to become a crystal white dwarf in about 10 billion years.

Engineers watch the progress of one of the test rovers in Morocco.

Europe is testing self-driving Mars rovers

Rovers on Mars today are amazing, but slow, and still mostly controlled by humans back on Earth. Europe is testing new self-driving software to help future Mars rovers travel faster and farther each day.

Blue-colored mass of swirling gas, with jets extending from the center.

Astronomers find the brightest quasar yet

It shines with a brightness equivalent to 600 trillion suns. “We don’t expect to find many quasars brighter than that in the whole observable universe,” said the astronomers.