hypervelocity star

For every 100 million stars in the galaxy lurks one hypervelocity star."

By 2010, sixteen hypervelocity stars had been observed.

Geller is also a co-discoverer of hypervelocity stars.

US 708 is a hypervelocity star that exceeds the escape velocity of the Milky Way.

Hypervelocity stars.

Although the cosmic cannonball is not the only "hypervelocity star" discovered, it is unique in the apparent origin of its speed.

The three types of high-velocity stars are: runaway stars, halo stars and hypervelocity stars.

Christened by the astronomer Warren Brown as the Outcast Star, it is the first discovered member of a class of objects named hypervelocity stars.

Hypervelocity stars (HVSs) are stars with velocities that are substantially different from that expected for a star belonging to the normal distribution of stars in the galaxy.

The huge mass lost of the white dwarf during the supernova causes the nearby partner to leave at its previous huge orbital speed of several hundred kilometers per second as a hypervelocity star.

"The star is traveling at an absurd velocity, twice as much as the star needs to escape the galaxy's gravitational field," explains Brown, a hypervelocity star hunter who found the first unbound star in 2005.

This story may seem like science fiction, but astronomers using NASA's Hubble Space Telescope say it is the most likely scenario for a so-called hypervelocity star, known as HE 0437-5439, one of the fastest ever detected.

Ordinary stars in the galaxy have velocities on the order of 100 km/s, while hypervelocity stars (especially those near the center of the galaxy, which is where most are thought to be produced), have velocities on the order of 1000 km/s.