James Webb Space Telescope prompts a rethink of how galaxies form
Adam Mann writes: Katherine Whitaker was on a video call with colleagues last summer when NASA released the first pictures from the ultra-powerful James Webb Space Telescope (JWST). Among the many awe-inspiring images was one of a sliver of sky surrounding the galaxy cluster SMACS 0723: It was brimming with some of the oldest and most distant galaxies ever recorded. “We would zoom in and be like, ‘Oh wow,’ and ‘What the heck is that?’” recalls Whitaker, an astronomer at…