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Stephan's Quintet

Stephan's Quintet is composed of five galaxies: NGC 7317, NGC 7318A, NGC 7318B, NGC 7319, and NGC 7320 (actually a foreground galaxy).


A visual grouping of five galaxies, four of which form the first compact group ever discovered


This group of galaxies is found in the constellation Pegasus, in the Northern Hemisphere.

Distance from Earth

290 million light-years (except for NGC 7320, which is only 40 million light-years from Earth)

Some members of this famous galaxy quintet are undergoing a clash that has distorted three of their shapes and revealed stars of many colors.

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"Fast Facts: Stephan's Quintet" is a table that lists the name, location, size, and distance of this group of interacting galaxies from Earth. A picture of the galaxies is included.

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Adaptable, at teacher's discretion
How to use in the classroom

Use this resource as:

A source of information. Read the table to find out about the galaxies.

A mapping activity. Locate the galaxies' associated constellation on a star map.

A large-number recognition activity. Have students study this table and other galaxy Fast Fact tables.  Students can order objects based upon their distances from Earth.

An inquiry tool. Have students write down questions they would like answered about the image and the information in the Fast Facts table.

An engagement tool. Involve students in a discussion.

Related materials

HubbleSite press release: "Hubble Opens New Eyes on the Universe"

Amazing Space resources by topic: Galaxies