Astronomers have discovered 11 entire galaxies that have undergone some unpleasant gravitational turbulence and flung from their home clusters, marooned in intercluster space.
If our planet had no gravity, what would happen? Would we all just float away like so many spacesuited George Clooneys? Join us in a little thought experiment, as we ponder a world that doesn't pull us down.
It's not a spare moon of ours, exactly, but Earth does have a sort of gravitational buddy out there, in the mellifluously named 3753 Cruithne. It orbits the sun, just like us, and is locked with Earth in what scientists call orbital resonance.
The BICEP2 gravitational wave announcement may have been premature, but the search has only just begun -- an interview with cosmologist Kendrick Smith.
For the first time, the mass of a binary pulsar pair has been precisely measured, but it was a race against time before the extreme gravitational warping of spacetime caused one of the dense objects to blip out of view.
How does time stop everything from happening at once? What mechanism drives time forward, but not backward? Continue reading →
Many of the physics theories explained in the movie 'Interstellar' are being investigated by the world's most powerful particle accelerator, which is awesome. Continue reading →
As gobsmackingly cool as it is to land on a comet AT ALL, the Rosetta craft's journey just to catch up to the flying rock was mind boggling in its own right. Trace explains the dizzying physics and helpful assist from gravity that made it possible.
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