Clearly, the Andromeda Nebula was a system ... that the Milky Way was only one star system (or galaxy) among myriad others. This was the birth of our modern universe of galaxies, so poetically ...

Horsehead Nebula: James Webb Space Telescope ... slamming into the gas shed by the star before it exploded. Galactic gathering: The vast galaxy cluster SDSS J1226+2152 in the constellation Coma ...