Red tides and a blue-green algae outbreak are fouling hundreds of miles of coast, killing fish and driving tourists from beaches. Some causes are natural, but human actions also play a role.
Algae cover the surface of the Caloosahatchee River at the W.P. Franklin Lock and Dam, July 12, 2018, in Alva, Florida. Photo via
This free-floating rogue planet – untethered to any star – has a magnetic field millions of times more powerful than Earth’s and auroras much more brilliant than our world’s northern lights.
Artist’s concept of rogue planet SIMP J01365663+0933473. The free-floating planet has a magnetic field millions of times more powerful than Earth’s and intense auroras. Image via Caltech/Chuck Carter/NRAO/AUI/NSF.
2018 has been an exceptional year for the Perseids. Wonderful photos are still coming in. Thanks to all who submitted!
Miska Saarikko? caught this daylight meteor Monday morning and wrote: "Got a big one at 04:05 CET. Settings were a bit off in the camera, but still fully visible during sunrise. Taken South of Stockholm, Sweden, from my window." Thanks, Miska!
Decades of work have gone into probing the heart of our Milky Way galaxy. Click in for a video showing stars orbiting the 4-million-solar-mass black hole at our galaxy’s core.
Milky Way in Australia via Erin Cole
61 Cygni isn’t bright. But it moves exceptionally rapidly against the background of more distant stars. Its motion reveals its nearness to Earth.
61 Cygni is a double star, captured here by Scott MacNeill at Frosty Drew Observatory, Charlestown, Rhode Island, June 2015.
Computer modeling suggests that – billions of years ago, when our solar system was young – a star swept near, stealing some of our sun’s material and creating the odd orbits of Kuiper Belt objects.
Artist’s concept of a new solar system forming from a disk of gas and dust. Image via NASA JPL-Caltech/Max Planck Institute
Some believe that Monday morning – August 13 – will be the best morning for 2018’s Perseid meteor shower.
Russ Adams caught this meteor on August 11, 2017.
You’ll enjoy this video of audio illusions from the guys at AsapSCIENCE. Can you understand the talking piano?
Chorus waves can be converted to sound. The ones around Earth sound like singing or chirping birds. Jupiter has stronger chorus waves, and now its large moon – Ganymede – has been found to have chorus waves a million times stronger than Jupiter’s.
Ganymede as seen by the Galileo spacecraft. Scientists have now found that the largest moon of Jupiter has chorus waves like Earth, but much more powerful. Image via NASA