NASA Highlights “Cannonball” Pulsar Racing Through Space at Nearly 2.5 Million MPH
WASHINGTON — A remarkable stellar object known as PSR J0002+6216, or simply J0002, is speeding through the Milky Way at nearly 2.5 million miles per hour, making it one of the fastest pulsars with a measured velocity.
NASA has highlighted the extraordinary object, which was created in a powerful supernova explosion and is now racing away from the remains of its stellar birthplace. At its current speed, astronomers expect the pulsar will eventually escape the Milky Way.
A Neutron Star Moving at Extraordinary Speed
A pulsar is an extremely dense, rapidly rotating neutron star formed when a massive star reaches the end of its life and explodes as a supernova.
J0002 is traveling at roughly 4 million kilometers per hour. At that speed, it could cover the distance between Earth and the Moon in only about six minutes. NASA says the object is moving approximately five times faster than the average pulsar and faster than 99% of pulsars whose speeds have been measured.
Scientists Traced It Back to a Supernova
One of the most intriguing features of J0002 is a long, narrow trail of radio emission extending behind it.
Observations from the National Science Foundation’s Karl G. Jansky Very Large Array (VLA) revealed that this trail points directly toward the center of the supernova remnant CTB 1. That alignment provides strong evidence that the pulsar was born in the explosion that created the remnant.
CTB 1 is the expanding debris left behind after a massive star exploded roughly 10,000 years ago. J0002 has already traveled beyond the main shell of that debris.
The Supernova May Have Given It a Powerful “Kick”
Astronomers believe an uneven supernova explosion may have delivered an enormous gravitational and physical kick to the newborn neutron star.
Exactly how such explosions accelerate neutron stars to extreme velocities remains an open scientific question. Researchers have proposed several mechanisms involving asymmetries in the collapsing star and the distribution of matter during the explosion.
J0002 therefore provides scientists with an unusual natural laboratory for studying what happens during the final moments of massive stars.
NASA’s Fermi Telescope Helped Measure Its Motion
The pulsar was discovered in 2017 through Einstein@Home, a citizen-science project that searches NASA’s Fermi gamma-ray data using computing resources contributed by volunteers.
J0002 spins approximately 8.7 times per second, producing a pulse of gamma rays with each rotation. Researchers used a decade of Fermi observations and a technique known as pulsar timing to determine the object’s motion.
The pulsar is located approximately 6,500 light-years from Earth in the constellation Cassiopeia.
A 13-Light-Year Cosmic Trail
As J0002 moves through interstellar gas, its passage generates shock waves and produces a stream of magnetic energy and accelerated particles.
The radio-emitting tail extends for roughly 13 light-years, creating a cosmic arrow pointing back toward the supernova remnant. This distinctive trail allowed researchers to connect the rapidly moving pulsar with its birthplace.
Eventually Heading Beyond the Galaxy
The pulsar’s extraordinary velocity has another consequence: scientists expect J0002 will ultimately escape the Milky Way.
Its journey demonstrates how violent stellar explosions can dramatically alter the paths of the compact objects they leave behind. Continued observations could help astronomers better understand how neutron stars receive their enormous velocities and how supernova explosions distribute energy and matter through galaxies.
For now, J0002 remains a striking example of the extreme events taking place across our galaxy—a tiny, superdense stellar remnant racing through space at millions of miles per hour.
