rotation
The Milky Way's Black Hole is Spinning as Fast as it Can
Is the supermassive black hole at the heart of the Milky Way (SagA*) spinning? And how fast? It's tricky to…
How Fast Does Venus Rotate?
Venus' orbit has some strange properties, which includes taking 243.025 days to rotate once, and the fact that it rotates…
Hubble Directly Measures Rotation of Cloudy ‘Super-Jupiter’
Astronomers use the Hubble Space Telescope to pin down the rotation rate of an exoplanet 170 light years from Earth…
How Long is a Day on Earth?
I'm going to ask you how long a day is on Earth, and you're going to get the haunting suspicion…
Is Phobos Doomed?
What fate awaits Phobos, one of the moons of Mars? “All these worlds are yours except Europa, attempt no landing…
Watch Pluto and Charon Engage in Their Orbital Dance
Now here's something I guarantee you've never seen before: a video of the dwarf planet Pluto and its largest moon…
Rosetta Watches Comet 67P Tumbling Through Space
This is really getting exciting! ESA's Rosetta spacecraft (and the piggybacked Philae lander) are in the home stretch to arrive at Comet…
This is the Moon, the Whole Moon and Nothing But the Moon
Take a look around the Moon... no, really, take a good look AROUND the Moon! This is a fantastic animation…
How Long is a Day on Mercury?
1/3 the distance from the Sun than Earth, it should be no surprise that a day on Mercury is a…
Moon Rotation
The rotation of the Moon is a strange situation. It takes the same amount of time for the Moon to…