National Geographic News
March 23, 2012
If you think life on Earth moves too fast, imagine being perched on a planet that’s hurtling through space 400 times faster than our home world.
According to a new study, astronomers predict that “hypervelocity planets” are streaking through our Milky Way galaxy at up to 30 million miles (48 million kilometers) an hourâ€”flung from the center of our galaxy by so-called gravitational slingshots.
Only subatomic particles such as cosmic rays are known to reach higher speeds in the Milky Way. (Related: “Lightning Creates Particle Accelerators Above Earth.”)