Astronomers discover strange new celestial object in our Milky Way galaxy
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Astronomers have discovered a strange new object in our Milky Way galaxy.

An international team revealed on Wednesday that a mysterious celestial object, which could be a star, a pair of stars, or something unknown, is simultaneously emitting X-rays and radio waves. This phenomenon occurs in a cycle that repeats every 44 minutes, especially during intense activity periods.

This object is situated 15,000 light-years away within the Milky Way, in a region abundant with stars, gas, and dust. According to Ziteng Andy Wang of Curtin University, it might be a highly magnetized, dead star like a neutron star or white dwarf.

This image provided by NASA shows X-rays from NASA's Chandra X-ray Observatory (represented in blue) that have been combined with infrared data from NASA's retired Spitzer Space Telescope (cyan, light blue, teal and orange), and radio from MeerKat (red).

A celestial object—potentially a star, a duo of stars, or another unknown entity—is producing X-rays while also discharging radio waves around the same time.

NASA/Chandra/Spitzer/MeerKat via AP

Or it could be “something exotic” and unknown, said Wang, lead author of the study published in the journal Nature.

NASA’s Chandra X-ray Observatory spotted the X-ray emissions by chance last year while focusing on a supernova remnant, or the remains of an exploded star. Wang said it was the first time X-rays had been seen coming from a so-called long-period radio transient, a rare object that cycles through radio signals over tens of minutes.

Given the uncertain distance, astronomers can’t tell if the weird object is associated with the supernova remnant or not. A single light-year is 5.8 trillion miles.

The hyperactive phase of this object – designated ASKAP J1832091 – appeared to last about a month. Outside of that period, the star did not emit any noticeable X-rays. That could mean more of these objects may be out there, scientists said.

“While our discovery doesn’t yet solve the mystery of what these objects are and may even deepen it, studying them brings us closer to two possibilities,” Wang said. “Either we are uncovering something entirely new, or we’re seeing a known type of object emitting radio and X-ray waves in a way we’ve never observed before.”

Launched in 1999, Chandra orbits tens of thousands of miles (kilometers) above Earth, observing some of the hottest, high-energy objects in the universe.

Copyright © 2025 by The Associated Press. All Rights Reserved.

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