This Huge Galactic Structure Is A Mind-Boggling 23 Million Light-Years Long

2026-07-11T00:30:04.000Z When it comes to galaxies, two discoveries over the past five years have given the word 'massive' a whole new meaning. Case in point, one of the biggest structures of galactic origin detected by humans in radio waves: Porphyrion. Read on below – and follow ScienceAlert for news that sparks your curiosity.