Astronomers find galaxy with no dark matter

The “Dragonfly” telescope in New Mexico was used by van Dokkum and colleagues to find galaxy NGC1052–DF2 in the northern constellation Cetus. (Pieter van Dokkum/via AP)

This Nov. 16, 2017 image made with the Hubble Space Telescope shows the diffuse galaxy NGC 1052-DF2, lighter area in center. Several other galaxies can be seen through it. (P van Dokkum/NASA/ESA via AP)

HILO — Dark matter is an invisible and mysterious substance that is thought to be crucial to the formation of galaxies.