New research suggests that many of Mars’ ancient channels, thought to have been carved by flowing surface water, were formed instead by meltwater beneath glacial ice sheets.

Galactic cosmic rays are high energy particles from explosive events like supernovae, zinging through our solar system, constantly bombarding both Earth and Mars. A researcher suggests they supply enough energy to make subsurface life on Mars possible.

The European Space Agency’s Trace Gas Orbiter has unexpectedly detected carbon dioxide and ozone in Mars’ atmosphere where the elusive methane should be, researchers in the UK and Russia have announced. The two gases may be hindering the probe’s methane detections.

A mysteriously long, thin cloud has again appeared over the Arsia Mons volcano on Mars.

These are the first spacecraft images yet acquired of the north pole of Ganymede, largest moon of the giant planet Jupiter. NASA’s Juno spacecraft – now orbiting Jupiter – obtained them.

And why this rediscovery of a lost world – called NGTS-11b – bodes well for finding habitable exoplanets.

The Mt. Lemmon survey discovered the asteroid on July 26. It was labeled near-Earth asteroid 2020 OY4. The asteroid then passed at about 11% of the moon’s distance early in the day on July 28. The Virtual Telescope Project in Rome captured its image.

A few observers in the Southern Hemisphere are beginning to capture Comet NEOWISE, too. Charts here for seeing the comet in late July and early August.

Scientists in Australia have discovered a strange new phenomenon in deep space – “Odd Radio Circles” – that appear in radio telescope images as mysterious circles or rings.

“This study significantly changes the view of Venus from a mostly inactive planet to one whose interior is still churning and can feed many active volcanoes,” one scientist said.