What is the main idea and list a least 2 details about the main idea?

Edwin Hubble came up with a way to classify galaxies by shape.He labeled elliptical galaxies E.He classified by th size of the galaxy's nucleus and the tightness of it's arms.

8 answers

Isn't this paragraph all about shapes?

I'll be glad to check your answers.
It is suppose to be this
What is the main idea and list a least 2 details about the main idea?
Edwin Hubble came up with a way to classify galaxies by shape.He labeled elliptical galaxies E.He classified them further by shape,using the numbers 0-7.Spiral galaxies can be either normal,labeled S,or barred spiral,labeled SB.They are then classified by the size of the galaxy's nucleus and the tightness of it's arms.
What do you think is the main idea?
Spiral galaxies can be either normal,labeled S,or barred spiral,labeled SB.
That is not the main idea.

Hint: The main idea is usually in the first sentence.
Edwin Hubble came up with a way to classify galaxies by shape.
Right! That's the main idea.

What are the two shapes of the galaxies?
i don't know can i have a hint
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