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An Arp to Arp TalkCredit: NASA, ESA and M. Livio (STScI). A pair of interacting galaxies called Arp 147 was captured by Hubble's Wide Field Planetary Camera 2

A perfect 10 for the Hubble Space Telescope! This once-in-a-lifetime image shows a pair of gravitationally interacting galaxies called Arp 147. The galaxy on the left, or the "one", is relatively undisturbed, whereas the galaxy on the right, or the "zero", is a messy ring of intense star formation. Image credit: NASA, ESA and M. Livio (STScI)

Arp 147 (also known as IC 298) is an interacting pair of ring galaxies. The system was formed when a spiral galaxy (image right) collided with an elliptical galaxy. he collision produced an expanding wave of star production (shown as bright blue) traveling at an effective speed of ≳100 km s−1 and began some 40 million years ago.

NGC 3718 (Arp 214) Distance: 42.4 Million Light Years NGC 3718 and its companion NGC 3729 are physically related members of the Ursa Major galaxy cluster. The two galaxies appear to orbit each other at a projected separation of 147,000 light years. NGC 3718 seems to have a rudimentary bar and spiral structure although it is recognized as a peculiar galaxy and as such is listed within Arp's Atlas of Peculiar Galaxies. via Dark Matter on Facebook

Arp 147, about 430 million light-years from Earth, contains the remnant of a spiral galaxy, right, that collided with the elliptical galaxy on the left.

Interacting Galaxies Arp 147 ... In this pair of gravitationally interacting galaxies called Arp 147, the blue ring-shaped galaxy's distinctive look was probably created when the galaxy on the left passed through the galaxy on the right.

galassie interagenti chiamate Arp 147