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An infrared image of Messier 81 taken by the Spitzer Space Telescope. The blue colors represent stellar emission observed at 3.6 μm. [13] The green colors represent 8 μm emission originating primarily from polycyclic aromatic hydrocarbons in the interstellar medium. [13]
The M81 Group is a galaxy group in the constellations Ursa Major and Camelopardalis that includes the galaxies Messier 81 and Messier 82, as well as several other galaxies with high apparent brightnesses. [1] The approximate center of the group is located at a distance of 3.6 Mpc, making it one of the nearest groups to the Local Group. [1]
Described in February 2022, the fast radio burst was found within a cluster of stars, called a globular cluster, on the outskirts of galaxy Messier 81, located 12 million light-years from Earth.
Infrared image of the core of the Milky Way galaxy, ... Messier 81, by Ken Crawford. Stephan's Quintet, by NASA/ESA/Hubble SM4 ERO Team (edited by Crisco 1492)
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Messier 82 (also known as NGC 3034, Cigar Galaxy or M82) is a starburst galaxy approximately 12 million light-years away in the constellation Ursa Major. It is the second-largest member of the M81 Group , with the D 25 isophotal diameter of 12.52 kiloparsecs (40,800 light-years ).
The galaxy — also known as Messier 104, or M104 — is about 30 million light-years from Earth in the Virgo constellation. French astronomer and comet hunter Pierre Méchain discovered it in 1781.
A GALEX image of the spiral galaxy Messier 81 in ultraviolet light. Credit:GALEX/ NASA / JPL - Caltech . Ultraviolet astronomy is the observation of electromagnetic radiation at ultraviolet wavelengths between approximately 10 and 320 nanometres ; shorter wavelengths—higher energy photons—are studied by X-ray astronomy and gamma-ray ...