Andromeda VIII (And VIII / 8) is a

galaxy A galaxy is a Physical system, system of stars, stellar remnants, interstellar medium, interstellar gas, cosmic dust, dust, and dark matter bound together by gravity. The word is derived from the Ancient Greek, Greek ' (), literally 'milky', ...

discovered in August 2003. It is a companion galaxy to the

Andromeda Galaxy The Andromeda Galaxy is a barred spiral galaxy and is the nearest major galaxy to the Milky Way. It was originally named the Andromeda Nebula and is cataloged as Messier 31, M31, and NGC 224. Andromeda has a Galaxy#Isophotal diameter, D25 isop ...

, M31, and evaded detection for so long due to its diffuse nature. The galaxy was finally discovered by measuring the

redshift In physics, a redshift is an increase in the wavelength, and corresponding decrease in the frequency and photon energy, of electromagnetic radiation (such as light). The opposite change, a decrease in wavelength and increase in frequency and e ...

s of stars in front of Andromeda, which proved to have different

velocities Velocity is a measurement of speed in a certain direction of motion. It is a fundamental concept in kinematics, the branch of classical mechanics that describes the motion of physical objects. Velocity is a vector quantity, meaning that both m ...

than M31 and hence were part of a different galaxy. As of at least 2006, the actuality of And VIII as a galaxy has not yet been firmly established (Merrett et al. 2006).

References

External links

SEDS Webpage for Andromeda VIII
{{DEFAULTSORT:Andromeda 08 Andromeda Subgroup Local Group Andromeda (constellation) Dwarf spheroidal galaxies 5056928 Astronomical objects discovered in 2003

See also

References

External links