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Astr110 Photography Projects, Spring 2005

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Siamese Twins, Courtney Lasater

Siamese Twins

Two separate galaxies, NGC 4567 and NGC 4568, form the Siamese Twins in the cluster of Virgo, and appear to be interactive.L.S. Copeland was the first to refer to the galaxies as the Siamese Twins. Some experts in the past have suggested that these two galaxies happen to line up in a way that only gives the illusion that they are interactive. These suggestions have been mostly overturned by more recent discoveries, though there is some debate of whether the two galaxies are actually interactive. The galaxies lie at a distance of about 42 million light-years away from Earth, with a linear size of about 73,000 light years.

As you can see in the photo above, both galaxies are spiral galaxies, and appear to interact within the distant edges of each galaxy. In the photo, the galaxies glow with a bright reddish yellow light. The galaxies represent one of the many strange wonders of the outer universe.


Right Ascension (J2000) 12:36:32
Declination (J2000) 11:15:31
Filters used blue(B), green(V), red(R), and clear(C)
Exposure time per filter

300 seconds

Date observed

April 1, 2005