Astronomers Discover ‘Ghost Galaxy’ Made Of 99.99% Dark Matter

Dark matter is infuriating. It’s everywhere, outnumbering regular matter by 5 to 1. Yet it doesn’t reveal itself to our eyes or telescopes. Dark matter gives off no light and interacts with ordinary matter in just one way — through gravity. By measuring how much it tugs on stars and galaxies, we can estimate the…
Read More

Scorpius feat

Getting Stung By A Scorpion Can Be A Beautiful Thing

Near the tail end of Scorpius the scorpion you’ll find a neat pair of stars — Shaula and Lesath — that form the stinger. Dubbed the Stinger Stars, from mid-northern latitudes they never rise higher than 10°-15° or a little more than a fist above the southern horizon. Trees and buildings usually get in the way of seeing…
Read More

Milky Way King FEA

Care For Tea With ‘Milk’? Fill Up At Sagittarius

I’m a tea drinker. Two cups a day keep my engine humming. On summer nights, the Teapot of Sagittarius stands at the ready to tip a different sort of cup. One that provides a thick brew of Milky Way stars, sooty interstellar gas clouds and sparkling star clusters. Sagittarius is a centaur with the body and four…
Read More

Black hole NASA et allFEA

Summer Nights Under The Milky Way’s Black Hole

Hidden behind a scree of interstellar dust 25,000 light years away in the constellation Sagittarius lies the center of the Milky Way galaxy. Billions of stars concentrate there surrounded by a a whorl of spiral arms. For every star we see in the nighttime sky, someone living near the galactic center would see one million.…
Read More

View to the east showing lots of active rays or pillars. My wide-angle lens was only wide enough to cover 1/3 of the display at a time. Credit: Bob King

Auroras Expected Sat. Night / AZ Fireball Update

Get ready for stormy weather. Zillions of sub-microscopic electrons and protons from a solar coronal hole are expected to impact Earth’s magnetic domain beginning sometime tomorrow afternoon. Space weather forecasters are calling for moderate storm conditions through about 10 p.m. (CDT) Saturday evening followed by a return to minor storm from 10 till 1 a.m. Based…
Read More