#Hubble tuning fork professional#

Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission. The gold standard for galaxy classification among professional astronomers is of course the Hubble classification. NASA Goddard Space Flight Center enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Ge produced a tuning fork diagram as he thought this demonstrated the evolution of elliptical. Gorin (STScI), Acknowledgement: Judy Schmidt Edwin Hubble classified galaxies according to their shape. Most of the smears and specks are distant galaxies, but the prominent bright object at the bottom is a foreground star called TYC 4386-787-1.Ĭredit: ESA/Hubble & NASA and N. Surrounding Mrk 820 in this image is a good sampling of other galaxy types, covering almost every type found on the Hubble Tuning Fork, both elliptical and spiral. A closer look at the appearance of Mrk 820 reveals hints of a spiral structure embedded in a circular halo of stars. Since then several people have suggested modifications and additions to his original scheme, but the basic idea of his. Hubbles original classification of galaxy types was published in 1936 in a book called 'The Realm of the Nebulae'. Lenticular galaxies like Mrk 820 are in the transition zone between ellipticals and spirals and lie right where the fork divides. The Hubble classification, often called the tuning fork diagram, is still used today to describe galaxies. The two prongs of the tuning fork represent types of unbarred and barred spiral galaxies. Possible missing link discovered between young and old galaxies Replacing the handle of Hubbles tuning fork Elliptical galaxies are not dead Under dark. They are arranged along the handle based on how elliptical they are, with the more spherical galaxies furthest from the tines of the fork, and the more egg-shaped ones closest to the end of the handle where it divides. Elliptical galaxies look like smooth blobs in the sky and lie on the handle of the fork. The Hubble Tuning Fork is used to classify galaxies according to their morphology. This galaxy is known as Mrk 820 and is classified as a lenticular galaxy - type S0 on the Hubble Tuning Fork. A Galaxy at the Center of the Hubble Tuning Fork