The close conjunction of Mercury with Venus in last night's evening sky was near the sun and exceedingly tough to spot, even with optical aid. Still, EarthSky friend Helio Vital managed to capture it!

Astronomers think the object they've labeled C/2019 Q4 - discovered August 30 - came from a place far, far away. If confirmed, it's only the 2nd interstellar object ever detected, after 'Oumuamua in 2017.

The solar system’s most photogenic planet, captured by most earthlings' favorite space telescope.

It's a full moon. It's a Harvest Moon. It's the smallest moon of 2019. And it comes on Friday the 13th! Want info on any or all of these things? We've got you covered.

A new study has found that plastic pollution is being deposited into the fossil record, with deposits increasing exponentially since 1945.

It's a huge bipolar gas structure, hundreds of light-years across, centered on our galaxy's center and near the galaxy's central supermassive black hole. Astronomers found it with the new, supersensitive MeerKAT telescope in South Africa.

It's a first-ever detection of water vapor in a super-Earth's atmosphere, orbiting in the habitable zone of its star, 110 light-years away. The discovery supports the possibility that our galaxy contains many such habitable worlds.

The lakes on Saturn's moon Titan are filled with liquid methane, not water, and some are surrounded by steep rims. A new study suggests these features might have been caused by explosions of warming nitrogen, which created Titan's lake basins long ago.

How much of what think you know about black holes is true, and how much is myth? To separate fact from fiction, check out this 4-minute vIdeo from NASA.

Chinese media have reported that the Yutu-2 rover has discovered a "gel-like" substance in a crater on the far side of the moon. It sounds intriguing, but details are still scarce.