Posts by 

Deborah Byrd

Star collision triggers supernova explosion

Star collision triggers supernova! Dramatic evidence that a black hole or neutron star spiraled its way into the core of a companion star and ... boom!

Aurora alert! Pair of CMEs to jolt Earth’s magnetic field

Aurora alert! A pair of coronal mass ejections will reach Earth September 1-2, 2021. Though not dangerous to satellites or the grid, they might cause auroras.

What flows into a galaxy ‘cleaner’ than what flows out

Pure hydrogen and helium gas flows into a galaxy. It's used to make new stars. Those stars make new elements, which are later released back to intergalactic space.

Late summer 2021 fires, California, seen from space

NASA's Terra satellite caught images of streamers of smoke from late summer 2021 fires in California during its 115,254th orbit of Earth.

Rare lunar halo – an odd-radius halo – over India

A common halo around the sun or moon has a radius of 22 degrees. It's called a 22-degree halo. But here's a rare lunar halo: an odd-radius halo.

New odds on asteroid Bennu. Will it strike Earth?

At a press conference August 11, 2021, planetary scientists released new odds on asteroid Bennu and its potential to strike Earth.

An all-sky red giant star symphony

The TESS planet-finder and Gaia space observatory have given us tickets to a red giant star symphony, now playing in our Milky Way galaxy.

The Mediterranean heatwave goes on

The Mediterranean heatwave is featuring land surface temperatures of over 50 C (122 F) and air temperatures in triple digits as well.

Parhelic circle and 2 halos over Alberta, Canada

Beautiful photo from an EarthSky community member showing showing portions of a 22-degree halo, circumscribed halo and parhelic circle.

Major 8.2-magnitude earthquake rocks Alaska

Sirens sounded across Alaska's Kodiak island last night, after an 8.2-magnitude earthquake prompted tsunami warmings.