Image: Astronomers are spying on a powerful galaxy

The amazing spiral galaxy NGC 772 seems to be spreading in this image taken by Gemini North’s phone in Hawaii. But in fact, its long arm has been changed to interact with a nearby dwarf galaxy called NGC 770 (not captured). The gravitational tug-of-war has changed the NGC 772 in its unique way, making it a clear target for Atlas of Peculiar Galaxies.

NGC 772 is about 100 million light -years away from Earth. Its unique shape and appearance earned the galaxy a place as the 78th entry in astronomer Halton Arp’s group. Atlas of Peculiar Galaxies, a list of 338 galaxies with – you guessed it – different types. The contents of this book, composed in 1966, are: M66, a distorted spiral galaxy; antennae (NGC 4038 / NGC 4039), a group with different antennae; and the Tadpole galaxy (Arp 188), which has a shiny head and a long small body. And these are just a few of the amazing galaxes that are scattered all over our universe.

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