NASAのインスタグラム(nasa) - 4月22日 08時18分

Behold, two spiral galaxies! Astronomers used the Hubble Space Telescope to take a portrait of a stunning pair of spiral galaxies. This starry pair offers a glimpse of what our Milky Way galaxy would look like to an outside observer. These galaxies look quite different because we see them angled at different positions on the sky. They are actually very similar in terms of their structure and contents.` Both galaxies are approximately 55 million light-years away and reside in a cluster of nearly 2,000 galaxies.
A typical spiral galaxy has arms of young stars that wind outward from its center. The bright arms are regions of intense star formation. Such galaxies have a central bulge and are surrounded by a faint halo of stars. Many spiral galaxies also have bars that extend from the central bulge to the arms.

Credits: NASA, ESA, and M. Mutchler (STScI)

#nasa #hubble #space #hst #galaxy #galaxies #stars #astronomy #science

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