NGC 2261: Hubble s Variable Nebula
What causes Hubble’s Variable Nebula to vary? The unusual nebula featured here changes its appearance noticeably in just […]
Astronomy
The Prague Astronomical Clock
In the center of Prague there’s a clock the size of a building. During the day, crowds gather […]
A Year of Full Moons
Do all full moons look the same? No. To see the slight differences, consider this grid of twelve […]
A Year of Full Moons
Do all full moons look the same? No. To see the slight differences, consider this grid of twelve […]
A 2017 U1: An Interstellar Visitor
Traveling at high velocity along an extreme hyperbolic orbit and making a hairpin turn as it swung past […]
NGC 891 vs Abell 347
Distant galaxies lie beyond a foreground of spiky Milky Way stars in this telescopic field of view. Centered […]
Thors Helmet Emission Nebula
This helmet-shaped cosmic cloud with wing-like appendages is popularly called Thor‘s Helmet. Heroically sized even for a Norse […]
Dark Matter in a Simulated Universe
Is our universe haunted? It might look that way on this dark matter map. The gravity of unseen […]
Orionid Meteors from Orion
Meteors have been shooting out from the constellation of Orion. This was expected, as October is the time […]
Night on a Spooky Planet
What spooky planet is this? Planet Earth of course, on a dark and stormy night in 2013 at […]