Chandra Release - March 10, 2026

Visual Description: GRB 230906A 

This release features two artist's concepts and a composite image depicting two cosmic collisions that began hundreds of millions of years ago.

 
At the center of the large artist's concept is a brilliant glowing ball with a nearly white core, and golden orange outer layers. This brilliant ball represents the brightest galaxy in a collision between two groups of galaxies, which began hundreds of millions of years ago. Gas and dust from that collision were tossed into intergalactic space in long tidal streams. In the illustration, the tidal streams resemble swooping blue streaks shooting off the brilliant ball. Near the end of each swooping tidal stream is a glowing orange streak, or ellipse. These glowing shapes are smaller individual galaxies, some of which are revealed to have spiraling arms when examined closely.

 
One of the tidal streams shoots toward our upper left, then begins to hook back down, passing two glowing orange galaxies along its path. Near the end of this tidal stream is a tiny galaxy and an X-ray source presented in the middle of a close-up insert. In the center of the composite insert, Hubble observations in orange reveal the tiny, faint galaxy buried in the tidal stream. A pool of neon blue haze shows X-rays detected by Chandra from the collision of two ultra-dense neutron stars. 

 
Astronomers believe that the tiny galaxy was born from gas and dust along the 600,000 light-year-long tidal stream, created by the initial collision of the galaxy groups. Over hundreds of millions of years, that material contributed to the birth of many stars within the tiny galaxy. Two of those stars collapsed into neutron stars, and ultimately collided, producing important elements like gold and platinum, and gravitational waves that rippled across space. 


The artist's concept in the other insert shows a close-up view from the side of what the aftermath of a neutron star collision might look like. A burst of gamma rays was originally detected by viewing it down the barrel of the jet, which triggered follow-up X-ray observations with Chandra and other X-ray telescopes.