27/09/2026
A galaxy where chaos is creating new stars.
Arp 263 is an irregular galaxy with a disturbed appearance that may be the result of a galactic merger. As galaxies interact, their gas and dust can collide and compress, triggering bursts of new star formation.
Webb’s infrared vision reveals this process in remarkable detail. Red structures trace dust and complex molecules, while blue regions show hydrogen gas energized by newly formed stars.
Across the galaxy, bright clumps reveal young stars and stellar clusters forming within the disturbed gas.
Even the brightest star in the image is a trick of perspective. Its dramatic diffraction spikes come from Webb’s optics, but the star itself is actually in the foreground of our own Milky Way, not part of Arp 263.
Arp 263 gives astronomers a valuable laboratory for studying how galaxy interactions can reshape gas and drive the birth of new stars.
Image credit: ESA/Webb, NASA & CSA, A. Leroy
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