Thanks to 2019's record drought in Europe, a 7,000-year-old circle of 150 upright stones is back on dry land in western Spain, after 50 years underwater.

Today, Venus is hot, dry ... hellish. But maybe not always. Scientists created 5 new computer simulations of Venus, all with some water coverage. All 5 models showed Venus as stable, temperate and with some water for 3 billion years.

This hot neighbor, with its surface veiled by thick clouds, hasn't benefited from the attention showered on Mars and the moon. But Venus might offer insights into Earth's future.

Launched in 2018, the BepiColombo mission will have the first of its 2 encounters with Venus - while on its way to Mercury - in October 2020. Coordinated observations at that time will involve 2 spacecraft and multiple ground-based telescopes. 

These upcoming mornings - September 26 and 27, 2019 - the old waning crescent moon and the star Regulus adorn the eastern sky before sunrise.

Dust devils are common are common on Earth, but ubiquitous on Mars, a desert world. Scientists are using drones carrying cameras and other instruments to gain new insights.

In most years, Fomalhaut appears solitary. In 2019, however, Fomalhaut has company in the evening sky. The bright planets Jupiter and Saturn are up there, too, pointing the way to Fomalhaut on the sky's dome.

This star undergoes a long-term dimming that's so mysterious it was, at one time, proposed as possible evidence of an alien culture. Now, scientists say, a disk of debris - torn from a melting exomoon - might explain Tabby's Star.

You can think of the equinox not as a whole day, but as a point along Earth's orbit. Want to understand that better? Guy Ottewell offers some insights.

Pulsars are the compact remnants of supernovae. They have strong magnetic fields and rotate rapidly. This one is spinning 707 times a second! Astronomers just discovered this pulsar is emitting high-energy gamma rays.