Star Formation Activity
As stated above, the star formation in Messier 90 appears truncated. Consequently, the galaxy's spiral arms appear to be smooth and featureless, rather than knotted like galaxies with extended star formation., which justifies why this galaxy, along with NGC 4921 in the Coma Cluster has been classified as the prototype of an anemic galaxy. Some authors go even further and consider it's a passive spiral galaxy, similar to those found on galaxy clusters with high redshift.
However, the center of Messier 90 appears to be a site of significant star formation activity. Multiple supernovae in the nucleus have produced 'superwinds' that are blowing the galaxy's interstellar medium outward into the intracluster medium. collimated in two jets, one of which is being disturbed by interaction with Virgo's intracluster medium as the galaxy moves through it.
Read more about this topic: Messier 90
Famous quotes containing the words star, formation and/or activity:
“Between us two it’s not a star at all.
It’s a new patented electric light,
Put up on trial by that Jerseyite
So much is being now expected of....”
—Robert Frost (1874–1963)
“It is because the body is a machine that education is possible. Education is the formation of habits, a superinducing of an artificial organisation upon the natural organisation of the body.”
—Thomas Henry Huxley (1825–1895)
“... the will always wills to do something and thus implicitly holds in contempt sheer thinking, whose whole activity depends on “doing nothing.””
—Hannah Arendt (1906–1975)