Why is the internet so chock-full of stories about asteroids on a collision course with Earth? At this rate, we should have been obliterated many times over already. Here comes the newest scare story: asteroid 2007 FT3. No, it won’t hit us, either.

Loki, the largest volcano on Jupiter’s moon Io, erupts on a more or less regular schedule. Planetary scientists are predicting an eruption this month. Here’s what we know.

Cassini data suggested that Saturn’s rings were only 10 to 100 million years old. A new study suggests that a “ring rain” onto Saturn makes the rings look younger than they really are, and that in fact Saturn’s rings date back billions of years.

What is ULX-4 – a mystery green blob of X-ray light that appeared in the Fireworks Galaxy – and then soon disappeared again? A black hole or neutron star are 2 possibilities.

It was exciting last week when scientists announced water vapor in a super-Earth’s atmosphere. But, even as the announcement came, other scientists were cautioning that the planet – K2-18b – is probably less like a super-Earth and more like a mini-Neptune.

Astronomers now call recently-discovered flares from supermassive black holes in distant galaxies quasi-periodic eruptions. “Giant black holes regularly flicker like a candle but the rapid, repeating changes seen in GSN 069 from December onwards are something completely new,” said one scientist.

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.

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.

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.

The electromagnetic spectrum describes all the wavelengths of light, both seen and unseen.

Astronomers have found evidence for a possible exomoon orbiting a gas giant planet 550 light-years away. If they’re interpreting the evidence correctly, this moon would be a place of destruction, even more volcanically active than Jupiter’s famous volcanic moon, Io.