Question

How do we know the Milky Way is a spiral galaxy ?​

Answer 1

Answer :-

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1. The shape of the galaxy as we see it.
2. The shape of the galaxy as we see it.The velocities of stars and gas in the galaxy show a rotational motion.
3. The shape of the galaxy as we see it.The velocities of stars and gas in the galaxy show a rotational motion.The gases, color, and dust are typical of spiral galaxies.

The shape of the galaxy as we see it.The velocities of stars and gas in the galaxy show a rotational motion.The gases, color, and dust are typical of spiral galaxies.The central bulge is about 12,000 to 16,000 light-years wide and 6,000 to 10,000 light-years thick. The central bulge contains mostly older stars and globular clusters. Some recent evidence suggests the bulge might not be spherical, but is instead shaped like a bar. The bar might be as long as 27,000 light-years long. The disk and bulge are surrounded by a faint, spherical halo, which also includes old stars and globular clusters. Astronomers have discovered that there is a gigantic black hole at the center of the galaxy.

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Answer 2

Answer:

What data and evidence do astronomers find that lets them know that the Milky Way is a spiral galaxy? The shape of the galaxy as we see it. The velocities of stars and gas in the galaxy show a rotational motion. The gases, color, and dust are typical of spiral galaxies.

Explanation:

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