Larger spacecraft releases small round probes near cloud-banded planet Venus.

Possible life signs in the clouds of Venus

A new analysis of data from the 1978 Pioneer Venus mission, by researchers at Cal Poly Pomona, finds evidence not only for phosphine, but also possible chemical disequilibrium in Venus’ atmosphere, an additional possible sign of biological activity.

Small water drops hitting water surface below.

Raindrop sizes similar on Earth and alien worlds

Whether the raindrop is made of water on Earth, methane on Titan, or liquid iron on an alien world, a new study shows that all raindrops will fall to the ground at a similar size.

Orbits of planets in the inner solar system.

Heads up! Small asteroid to pass very close on April 12

Small asteroid 2021 GW4 will pass extremely close to Earth on Monday, April 12, 2021. It’ll pass just 12,313 miles (19,816 km) from Earth’s surface, or about 5% the Earth-moon distance.

2 galaxies nearly merged, dotted with pink along arms, and centered with 2 brilliant white lights.

Hubble spots double quasars in merging galaxies

New images of the oldest known pairs of quasars, farthest and oldest yet seen, show that their home galaxies are colliding.

The closest extragalactic fast radio burst yet?

Astronomers detected a new, nearby, repeating fast radio burst, originating from a spot near the great spiral galaxy M81.

L-Caltech-SwRI-sq.jpg" alt="

Juno finds a new auroral feature on Jupiter

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.

Colorful planet with bands in atmosphere and thin rings.

Scientists detect X-rays from Uranus

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.

Purple glow and spots of light on a black background.

An image of a piece of the cosmic web

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.

Glowing pink blob, scrabbly green lines, on a black background.

Is the Hyades star cluster being destroyed?

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!

Ball of light with tail surrounded by colorful streaks.

Interstellar visitor Borisov could be 1st truly pristine comet yet seen

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.