What makes a galaxy spiral?

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Astronomers believe that galaxies have spiral arms because galaxies rotate – or spin around a central axis – and because of something called “density waves.” … A spiral galaxy's rotation, or spin, bends the waves into spirals. Stars pass through the wave as they orbit the galaxy center.Astronomers believe that galaxies have spiral arms because galaxies rotate – or spin around a central axis – and because of something called “density waves.” … A spiral galaxy's rotation, or spin, bends the waves into spirals. Stars pass through the wave as they orbit the galaxy center.11 Sept 2008

What are 5 characteristics of a spiral galaxy?

Structure

  • A flat, rotating disc of stars and interstellar matter of which spiral arms are prominent components.
  • A central stellar bulge of mainly older stars, which resembles an elliptical galaxy.
  • A bar-shaped distribution of stars.
  • A near-spherical halo of stars, including many in globular clusters.

What are 3 characteristics of spiral galaxies?

Spiral galaxies usually consist of a rotating disk that contains stars, dust, gas, and a concentration of stars known as the bulge in the center.

Who created universe?

Many religious persons, including many scientists, hold that God created the universe and the various processes driving physical and biological evolution and that these processes then resulted in the creation of galaxies, our solar system, and life on Earth.

What does Hubble’s law tell us?

Hubble's Law states that an object's recessional velocity is proportional to the distance from the observer.

How do you classify spiral galaxies?

Spiral galaxies are classified as Sa/SBa, Sb/SBb or Sc/SBc (classic/barred) according to the tightness of their spiral, the clumpiness of their spiral arms, and the size of their central bulge. These differences can be traced back to the relative amounts of gas and dust contained within the galaxies.

Do all spiral galaxies have black holes?

Although not certain, it seems very likely that most (if not all) spiral galaxies contain a supermassive black hole and sometimes more than one. … There is also very strong evidence that black holes may be crucially important, perhaps even required, in the formation of galaxies in the early Universe.

Who created the God?

We ask, "If all things have a creator, then who created God?" Actually, only created things have a creator, so it's improper to lump God with his creation. God has revealed himself to us in the Bible as having always existed. Atheists counter that there is no reason to assume the universe was created.

What is the first thing that God created?

In the beginning God created the heaven and the earth. And the earth was without form, and void; and darkness was upon the face of the deep. And the Spirit of God moved upon the face of the waters. And God said, Let there be light: and there was light.