Summary:
- Astronomers have discovered a galaxy that is made up of mostly dark matter, which is a mysterious substance that cannot be seen but makes up about 85% of the universe's mass.
- This galaxy, called Dragonfly 44, is located about 330 million light-years from Earth and is one of the faintest and most diffuse galaxies ever observed.
- The discovery of Dragonfly 44 provides important insights into the nature of dark matter and how galaxies form, as it suggests that dark matter can be the dominant component in some galaxies.