Ring galaxy
Hoag's Object, a ring galaxy.
A ring galaxy is a galaxy with a ring-like appearance. The ring consists of massive, relatively young blue stars, which are extremely bright.
In the type of event producing a ring galaxy, the impulse of the collision draws the larger galaxy's stars inward toward its center.
Ring Galaxy
A galaxy with a ring-like appearance. The ring contains luminous blue stars, but relatively little luminous matter is present in the central regions.
Ring Galaxy
A galaxy that resembles a ring around a bright nucleus; believed to be the result of a head-on collision of two galaxies.
Roche Limit ...
Ring Galaxy
A galaxy that has a ring-like appearance. The ring usually contains luminous blue stars. Ring galaxies are believed to have been formed by collisions with other galaxies.
3. a. {Polar Ring Galaxy} It contains an inner central disk of old stars and an outer ring of younger stars giving it the appearance of a ring on a ringer.
Hoag's Galaxy is a Ring Galaxy
Black Feathered Sun
Pinwheel Galaxy Wikipedia
Barred Spiral Galaxy M95
Why do some spiral galaxies have a ring around the center?
Hoag's Object, an example of a ring galaxy.
Peculiar galaxies are galactic formations that develop unusual properties due to tidal interactions with other galaxies.
Our Milky Way's neighbouring galaxy, the Large Magellanic Cloud (LMC), has accreted many stars from its smaller neighbour, the Small Magellanic Cloud (SMC). The image shows the LMC as it appears in observations by the Spitzer Space Telescope.
It is classified as a ring galaxy; ring galaxies are a striking example of how collisions between galaxies can dramatically change their structure while also triggering the formation of new stars.
In February 1987 a new star appeared in the Large Magellanic Cloud, a neighbouring galaxy 170,000 light years away. What was remarkable was that this was the first naked-eye supernova (SN) visible since 1604.
An example of this is the ring galaxy, which possesses a ring-like structure of stars and interstellar medium surrounding a bare core. A ring galaxy is thought to occur when a smaller galaxy passes through the core of a spiral galaxy.
Notable Features: Andromeda is famous for the Andromeda galaxy (M31) which is a large neighbouring galaxy of our own Milky Way, and, at 2.2 million light-years, is the most distant object visible to the naked eye.
Meanwhile study of the Magellanic Clouds (by Henrietta Leavitt and Annie Cannon) laid a basis for measuring galaxy distances, via the period-luminosity relation for pulsating Cepheid variables. Using the 100" reflector on Mt.
For (1) look for galactic material pulled away from a galaxy by a neighboring galaxy. Is the latter galaxy also tidally distorted? In (2) the surest sign of starburst activity are bright knots of star formation.
Angular distance on the celestial sphere measured eastward along the celestial equator from the equinox to the hour circle passing through the celestial object. Right ascension is usually given in combination with declination. [S92]
Ring Galaxy ...
The wind extends ~10,000 light years from the centre of the galaxy where the starbust is taking place. The burst of star formation powering the wind was probably caused by an interaction with the neighbouring galaxy M81 (not shown).
Over time a quasar will fade away, possibly going through a Seyfert phase and then finally ending up as just a boring galaxy.
More than 30 supernovas events are observed annually in distant galaxies. Three supernovas have been seen in our own galaxy, in 1054, 1572, and 1604; in 1987 a supernova erupted in a neighboring galaxy, the Large Magellanic Cloud.
In this lesson I will show you how to see, with your naked eye, our nearest neighboring galaxy - the Andromeda Galaxy. I'll also show you where you can find a few other nearby galaxies (with magnification) and a new, tiny constellation.
Such gravitational fields can be produced by a neighboring galaxy exerting a tidal gravitational field, or by the presence of a "bar" in the center of the galaxy. A bar is a nonspherical galactic bulge.
 See also: Galaxy, Galaxies, Star, Dwarf, Cluster
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