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Humans Just Stared At The Universe. The Universe Is Staring Back

October 31, 2024 by Deborah Bloomfield

An almost galaxy merger has been caught looking like a pair of eyes staring back at us from the depths of space. NGC 2207 and IC 2163 are a pair of galaxies engaged in the celestial tango that will end up in their eventual fusion into a single object. For the last few million years, IC 2163 has been sliding behind the larger NCG 2207. For now, however, they have only grazed each other.

The interaction is slight but profound and this is why the combined efforts of JWST and Hubble are perfect for these observations. JWST brought the mid-infrared details while Hubble revealed the visible and ultraviolet. Each wavelength can be used to track star formation in the galaxy pairs, which is being accentuated by the merging process.

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Two spiral galaxies take the shape of a colorful beaded mask that sits above the nose. The galaxy at left, IC 2163, is smaller, taking up a little over a quarter of the view. The galaxy at right, NGC 2207, takes up half the view, with its spiral arms reaching the edges. IC 2163 has a bright orange core, with two prominent spiral arms that rotate counter clockwise and become straighter towards the ends, the left side extending almost to the edge. Its arms are a mix of pink, white, and blue, with an area that takes the shape of an eyelid appearing whitest. NGC 2207 has a very bright core. Overall, it appears to have larger, thicker spiral arms that spin counter clockwise. This galaxy also contains more and larger blue areas of star formation that poke out like holes from the pink spiral arms. In the middle, the galaxies’ arms appear to overlap. The edges show the black background of space, including extremely distant galaxies that look like orange and red smudges, and a few foreground stars.

The two gorgeous spirals in all their glory.

Image Credit: NASA, ESA, CSA, STScI

While a galaxy like the Milky Way forms a couple of stars the size of the Sun every year, these galaxies are producing 12 times as many. Our galaxy averages one supernova every 50 years. These two have had seven known supernovae in recent decades. These galaxies are active and the combined observations of JWST and Hubble showcase the activity.

Starbursts spot across the arms that have been twisted by the mutual attraction. The hollows in the red-marked gas are where a supernova has taken place. Spot the bubbling activity across the spiral arms. We are witnessing a snapshot of what will become an incredible merger.

Deborah Bloomfield
Deborah Bloomfield

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Source Link: Humans Just Stared At The Universe. The Universe Is Staring Back

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