About 77% of the galaxies in the universe are spiral-shaped. Why not? The story of “Penguin” and his “egg” is about destruction, not love.
The strange images of these two galaxies can easily be imagined as penguins and their eggs, which are high-tech samples of NASA’s observation of the universe today. They are located 326 million light-years away in the southern constellation Hydra.
In order to obtain the photos, they combined the information obtained by the two telescopes, and it is still hard to believe that they are not science fiction. One is the Hubble Telescope, which collects visible light from objects in the universe, and the other is the Spitzer aircraft, which can detect the light emitted by objects in the infrared spectrum.
They are two distant galaxies, called Arp 142, strangely similar to penguins that protect eggs.
The reason for its strange shape is related to the interaction of the Milky Way star pair, but this is not entirely a romantic relationship. Although maybe this is the way of interstellar love.
The deformation of the two galaxies is due to gravity, which makes them slowly move closer together until one day they finally merge.
Penguin loses symmetry
NGC 2336, the “penguin” part of the pair, may be a relatively normal-looking spiral galaxy, flattened like a pancake with soft and symmetrical spiral arms. Rich in newly formed hot stars, they can be seen as bluish filaments in Hubble’s visible light.
NGC 2937 is twisted, twisted and broken by the powerful gravity of NGC 2937
However, its shape has been distorted and deformed due to the gravity tug of its neighbor “egg”.
Due to this distortion, the central sphere that was once a bright star in NGC 2936 has now become the “eye” of the penguin.
The gas string mixed with dust is highlighted as red filaments that are detected in the longer wavelength infrared light seen by Spitzer.
“Eggs” have older stars
In contrast, the “egg” of the two, NGC 2937, has basically no details. The green light of the star is significantly different, which indicates that the age of the star is much older.
The absence of traces of bright red dust indicates that it has long lost the gas and dust reserves that can form new stars.
Although this galaxy responds to neighboring galaxies, the smooth distribution of its stars prevents us from knowing the distortion of its shape.
Over time, these two galaxies will merge to form a single object with two stars, gas and dust mixed together.
This merger may be an important step in the history of most of the large galaxies we see in the nearby universe (including our own Milky Way).
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