I captured this image of the once-in-a-lifetime aurora borealis on May 10, 2024 at 10:41 pm, from the trail behind my house in Collingwood, Ontario, Canada. Despite somethin cloud we were able to see the aurorae in motion. The green glow is from singly ionized oxygen. The blue arises from nitrogen and the purples come…
Read more
This amazing composite image by Detlef Hartmann shows the continued expansion of the Crab Nebula Supernova Remnant (aka Messier 1) in Taurus over 10 years (Sept 29, 2008 through Sept 22, 2017). It spans about 0.1 degrees of the sky. In the heart of the nebula sits a rapidly rotating neutron star that emits radio…
Read more
This full-disk image of the sun in visible wavelengths was taken by the Solar Dynamics Observatory satellite on August 29, 2021. It shows the huge sunspot group designated AR2860 that is currently visible by anyone using safely filtered telescopes, pinhole projectors, and eclipse viewers. That active region is emitting strong M-class flares. Visit Spaceweather.com and…
Read more
This full disk image of the sun on April 23, 2021 was taken by Dave Hoskins. This view shows the sun through a special solar telescope that uses the Hydrogen-alpha wavelength in the red part of the visible spectrum. A large group of small sunspots sits just to the lower left of centre, surrounded by…
Read more