Scientists have noticed signs of rotation in the galaxy MACS1149-JD1 (abbreviated as JD1), which is so far away that the light
"The origin of rotational motion ingalaxies is closely related to the question of how galaxies like the Milky Way formed, he added. “So it would be interesting to find the beginning of rotation in the early universe.”
Due to the great distance from the Earth, its light wasstretched, or re-reflected, into longer wavelengths due to the expansion of the universe. This reddish light showed that JD1 came into existence just 500 million years after the Big Bang.
To do this, astronomers used the light of the entiregalaxies. Now, using the Atacama Large Submillimeter Array in Chile for about two months, Inoue and colleagues have measured more subtle differences in how this light shifts across the galaxy's disk. The new data show that while all of JD1 is moving away from Earth, its northern part is moving away more slowly than its southern part. This is the sign of rotation.
JD1 rotates at about 180,000 rpm.km / h, which is about a quarter less than the speed of rotation of the Milky Way. The galaxy is also smaller than today's spiral galaxies. Perhaps JD1 is just starting to spin.
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