Phobos: Doomed Moon of Mars
This moon is doomed. Mars, the red planet named for the Roman god of war, has two tiny […]
Astronomy
Shipwreck at Moonset
A crescent Moon is about to sink under the western horizon in this sea and night skyscape. The […]
Good Morning Leonid
On November 17, just an hour before sunrise, this bright and colorful meteor flashed through clear predawn skies. […]
Swirls and Colors on Jupiter from Juno
What creates the colors in Jupiter’s clouds? No one is sure. The thick atmosphere of Jupiter is mostly […]
Unexpected Trajectory Interstellar Asteroid Oumuamua
Why is ‘Oumuamua differing from its expected trajectory? Last year, 1I/2017 U1 ‘Oumuamua became the first known asteroid […]
The Tarantula Nebula
The Tarantula Nebula, also known as 30 Doradus, is more than a thousand light-years in diameter, a giant […]
The Hill, The Moon, and Saturn
Last Sunday when the Moon was young its sunlit crescent hung low near the western horizon at sunset. […]
The Cave Nebula in Hydrogen, Oxygen, and Sulfur
What’s inside this cosmic cave? A stellar nursery 10 light-years deep. The featured skyscape is dominated by dusty […]
Rotating Asteroid Bennu from OSIRIS REx
Could this close-by asteroid ever hit the Earth? Eventually yes — but probably not for a very long […]
The Lagoon Nebula is Stars, Gas, and Dust
The majestic Lagoon Nebula is filled with hot gas and the home for many young stars. Spanning 100 […]