NASA / ESA’s Hubble Space Telescope has captured an interesting image of the circular Perseus Cluster (Abell 426), which contains the barred spiral galaxy MCG+07-07-072, located 320 million light-years from Earth in the constellation Perseus.
MCG+07-07-072 has a bizarre shape for a spiral galaxy, with its thin arms emerging from the ends of its barred core to draw a near-circle around the disc. What you see here is a glowing bar stretching across its core and from the ends of the bar, thin spiral arms wrap around the galaxy to form a closed disc. The fuzzy arms are formed from dust and stars, while the galaxy is on a black, mostly-empty background.
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Lenticular galaxies are a type that sit between elliptical and spiral galaxies. They feature a large disc, unlike an elliptical galaxy, but lack any spiral arms. Lenticular means lens-shaped, and these galaxies often feature ring-like shapes in their discs. Meanwhile, the classification of ‘ring galaxy’ is reserved for peculiar galaxies with a round ring of gas and star formation, much like spiral arms look, but completely disconnected from the galactic nucleus – or even without any visible nucleus,” said the ESA.
