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Andromeda Galaxy

Andromeda Galaxy, M31, NGC 224


A spiral galaxy that is estimated to contain as many as a trillion stars


The oldest known stars are 13 billion years old


Found in the Andromeda constellation, northern celestial hemisphere

Distance from Earth

Approximately 2.5 million light-years away


140,000 light-years in width

A ground-based image of the Andromeda Galaxy

Enlarge Image


"Fast Facts: Andromeda Galaxy" is a table that lists the name, description, location, size, and distance of the galaxy from Earth. An image of the galaxy is included.

Printer-friendly web page
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 this object.

A mapping activity. Locate the galaxy's 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 Finds Mysterious Disk of Blue Stars Around Black Hole"

Amazing Space resources by topic: Galaxies