Watch for this eerie light about 2 hours before sunrise in the Northern Hemisphere. From the Southern Hemisphere, watch for it after sunset.

Where can we expect to find life beyond Earth? A new study has redefined the lower limit in mass for habitable exoworlds. It suggests that low-mass waterworlds might exist and might be a place to look.

Biologists report that the white bellbird, which lives in the mountains of the Amazon, has shattered the record for the world's loudest bird.

For the ultimate challenge, try finding all 5 bright planets - Mercury, Venus, Mars, Jupiter and Saturn - in the late October 2019 night sky.

Venus passes its descending node on Friday at 2 UTC. What is it? And why does astronomer Guy Ottewell say that nodes "shape the orbits of the moving bodies and set them up for whatever else happens" ... ?

Ten years ago, scientists speculated that warm dust in the exoplanet system BD +20 307 - located 300 light years away - had resulted from a planet-to-planet collision. Now astronomers see 10% more warm dust in this system, further supporting the idea of a collision between worlds.

NOAA has issued its winter 2019-2020 outlook for temperature, precipitation and drought for the US, including Alaska and Hawaii.

Photo of star trails by an astronaut onboard the International Space Station (ISS).

A 2016 study suggested tall ice cliffs along Antarctica's coast might collapse rapidly under their own weight and contribute to more than 6 feet of sea-level rise by 2100. Now, MIT researchers have found this prediction may be overestimated.

After a near-miss with extinction, a population of humpback whales in the South Atlantic has rebounded.