A blend of a total of 100 images showing every sunspot that appeared on the sun from December 25, 2020, to April 3, 2021.

The Pacaya volcano in Guatemala is still erupting, spewing rivers of lava and ash clouds. See photos, video, and satellite images.

NASA's Juno spacecraft - whose mission in orbit around Jupiter was recently extended to 2025 - has been used to discover a rapidly expanding auroral ring at the very fringes of the Jovian magnetosphere.

For the first time, scientists have detected X-rays being emitted by the planet Uranus. The discovery was made by a new analysis of data from NASA's Chandra X-ray Observatory.

Around 80 million years ago, as tyrannosaurs ruled the Northern Hemisphere, Llukalkan aliocranianus - or the ‘one who causes fear’ - flourished in the southern continents.

An international team of astronomers has mapped a piece of the cosmic web without using bright quasars for the first time. They did it by turning a powerful instrument to a single region of the sky for hundreds of hours.

The waning crescent moon will be sweeping by the morning planets, Jupiter and Saturn, from April 5-8, 2021.

get up early on April 4, 2021, to view the southernmost last quarter moon of the year.

Data from ESA’s Gaia star-mapping satellite have revealed tantalizing evidence that the famous V-shaped Hyades - nearest star cluster to our sun - is being disrupted. The culprit may be a suspected population of dark matter sub-halos. Wow!

Comet 2I/Borisov is the 2nd known object to pass near our sun from outside our solar system. Its 2019 pass near our sun might have been its first-ever interaction with a star. If so, it's among the most pristine, or unspoiled, objects yet known.