Hubble Space Telescope Jet Speed of Light
NASA / ESA’s Hubble Space Telescope observed an event, GW170817, that involved a collision between two neutron stars, which are the cores of massive supergiant stars. The energy released was so massive that it would match that of a supernova explosion, resulting in a jet propelled through space at nearly the speed of light.



After the explosion, researchers pointed Hubble at the direction of GW170817 two days later, and observed the aftermath. They discovered that the neutron stars collapsed into a black hole, which pulled materials toward it, resulting in a rapidly-spinning disk that produces jets moving outwards from its poles. This jet continued to smash and sweep up material in the explosion debris, including a blob from which this impossibly fast jet emerged.

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I’m amazed that Hubble could give us such a precise measurement, which rivals the precision achieved by powerful radio VLBI telescopes spread across the globe,” said Kunal P. Mooley, lead author of paper from Caltech in Pasadena, California.

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