In May 2019, astronomers measured the largest flare ever from Proxima Centauri, the closest star to our sun. What do such flares mean for possible alien life, on a planet in the Proxima Centauri system, only 4 light-years away?

Venus and Mercury are both in the western sky after sunset now, but both are exceedingly low in the sky, in the midst of bright twilight, and so difficult to spot. These photos captured them.

Watch for the waning moon to swing to the south of the ringed planet Saturn and then south of the king planet Jupiter around May 3, 4 and 5, 2021.

Live in the Northern Hemisphere? If so, May 2021 presents the year's best month for spotting the planet Mercury in the evening sky.

Check out the videos in this post to see the hypnotic pulse of swimming jellyfish. Their gentle movement belies a complex flow of water that make these creatures highly energy-efficient swimmers.

Within hours of each other, one rocket left the Earth on April 28, 2021, and one cargo space ship returned on April 29 - via a planned destruction during re-entry - after having been attached to the International Space Station for a year.

In 2018, a small asteroid crashed into Earth, and scientists recovered pieces of it in a Botswana game reserve. Now the scientists have determined the space rock's origin: Vesta, in the asteroid belt.

Every year millions of tons of dust from the Sahara Desert are swirled up into the atmosphere and carried across the Atlantic. Research suggests that, as the climate changes, Saharan dust transport will decrease.

Color image of the Martian surface, captured by the Ingenuity Mars helicopter.

Astronomers have managed to detect very long wavelength radio emission from a well-studied, repeating fast radio burst, called FRB 20180916B. What's more, the longer wavelengths arrive 3 days after the shorter wavelength counterpart of the signal! Why?