Astronomy
Centaurs Keep Their Rings From Greedy Gas Giants
Minor planets like Chariklo are good at keeping their ring systems away from larger planets, and we are beginning to…
Time For NASA To Double Down On Journey To Mars
With the 2030s approaching, and an impending election, NASA needs to redouble its efforts to make a crewed mission to…
What Are The Diameters of the Planets?
The planets of our Solar System vary considerably, with some being a fraction of Earth's diameter, and others many times…
Messier 15 (M15) – The Great Pegasus Cluster
Located in the Pegasus constellation, some 33,600 light years from Earth, is the M15 Great Pegasus Cluster, one of the…
Seeking the Summer Solstice
Today marks the June solstice, as the Sun passes highest in the sky for observers across the northern hemisphere. Here's…
Peering for Pluto: Our Guide to Opposition 2016
The coming month is a great time to cross Pluto off of your observing life list, with our complete guide…
Mysterious Greek Device Found To Be Astronomical Computer
A decade of high-tech scanning has confirmed that the Antikythera Mechanism is an ancient astronomical computer.
Looking for Lunar Letters
This weekend offers backyard scope users a great chance to ferret out letters of the alphabet, etched across the lunar…
Take A Look Beneath Jupiter’s Clouds
A new radio-telescope image of Jupiter has revealed the rising plumes of ammonia that help shape Jupiter's clouds.