“Studying the structures of other galaxies is a key way to learn about the structure of our own, given that humans can’t leave the Milky Way to look back and see what it looks like from the outside.
“It helps to compare our observations of our home galaxy with those of nearby galaxies we can see in their entirety.”
The Hubble Space Telescope was launched into orbit on April 24, 1990.
The orbital observatory flies above the planet at speeds of about 17,000mph.
