hypervelocity

Chinese astronomers spot two new hypervelocity stars

Chinese astronomers spot two new hypervelocity stars

Most stars in our galaxy behave predictably, orbiting around the center of the Milky Way at speeds of about 100 km/s (62 mi/s). But some stars achieve velocities that are significantly greater, to the point that they are even able to escape the gravitational pull of the galaxy. These are known as hypervelocity stars (HVS), a rare type of star that is believed to be the result of interactions with a supermassive black hole (SMBH).

Planets Could Travel Along With Rogue 'Hypervelocity' Stars, Spreading Life Throughout The Universe

Planets Could Travel Along With Rogue 'Hypervelocity' Stars, Spreading Life Throughout The Universe

Back in 1988, astronomer Jack Hills predicted a type of “rogue”star might exist that is not bound to any particular galaxy. These stars, he reasoned, were periodically ejected from their host galaxy by some sort of mechanism to begin traveling through interstellar space.