Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • abbr. The Andromeda Galaxy; a giant spiral galaxy in the Local Group, together with the Milky Way galaxy. It is at a distance of approximately 2.5 million light years from Earth, in the direction of the constellation Andromeda.

Etymologies

From Charles Messier, who first published Nebulae and Star Clusters in 1774 as a listing of visible objects in the night sky that were not stars. Objects in Messier's catalog are numbered, and the letter M (for Messier) is prepended to these numbers. (Wiktionary)

Examples

  • The A329 (M) was built in the way it was because it was originally designed to be extended into an "M31" - a link from the M4 to the M3 and on further to the M25.

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  • The immense Andromeda galaxy, also known as M31 is the Milky Way's neighbour.

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  • The galaxy, known as M31 in the constellation Andromeda, is the largest and closest spiral galaxy to our own.

    Signs of the Times

  • Explanation: Taken by a telescope onboard NASA's Swift satellite, this stunning vista represents the highest resolution image ever made of the Andromeda Galaxy (aka M31) - at ultraviolet wavelengths.

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  • The above photograph was taken over Neuchâtel, Switzerland, and captured the central band of our Milky Way galaxy, the Andromeda galaxy (M31), and the Triangulum galaxy (M33).

    Edna St. Vincent Millay's candle burns bright

  • Credit: NASA/CXC/MPE/W. Pietsch et al. Andromeda Galaxy (M31), our closest neighbour.

    Archive 2009-01-01

  • The nearest comparable galaxy - Andromeda, or M31 - is at about 25 millimetres or one inch along this tape, and happens to be approaching us at about three hundred miles per second.

    Size Matters

  • The Canon Vixia HF M31 HD camcorder ($800) features face detection and tracking technology.

    New camcorder Ratings show face-tracking capability varies

  • I found that the Canon Vixia HF M31 worked much better.

    New camcorder Ratings show face-tracking capability varies

  • For example, two high-definition models — the Sony HDR-CX550V, $1,300, and the Canon Vixia HF M31, $800 — can not only detect faces (in order to set the focus, exposure, and color balance so that faces appear sharp, well exposed, and the proper color) but also track them no matter where they move in the frame.

    New camcorder Ratings show face-tracking capability varies

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