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Emily wants to show that she knows the shapes of galaxies. She takes a tennis ball and makes a small cut in it to release the air inside. She then takes it and tries to flatten it our on the table by pressing down on it. What type of galaxy is she trying to model?

Spiral

Elliptical

Irregular

None of the above

Elliptical galaxies are a type of galaxy with an ellipsoidal shape and a smooth image with little to no features. Ellipsoidal shapes look like slightly squished spheres, just like a compressed tennis ball would look like.

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kdrdixon kdrdixon · Answer 2 · 2019-05-12T03:28:45+02:00

Answer: She is trying to model an elliptical galaxy

Explanation:Elliptical galaxies are football shaped, fat in the center and tapered toward the ends. Stars in an elliptical galaxy spread out evenly from the galaxy's center. The largest galaxies in the universe are giant elliptical galaxies which may have more than 1 trillion stars. Some elliptical galaxies are as much as 20 times bigger than the Milky Way.

Elliptical galaxies appear reddish, indicating that they are formed by stars which are older and cooler than our own sun.

Elliptical galaxies, such as M87 (left), have very little gas and dust. Because gas and dust are found in the clouds that are the birthplaces of stars, we should expect to see very few young stars in elliptical galaxies. In fact, elliptical galaxies contain primarily old, red stars (also known as Population II stars).

Elliptical galaxies vary widely in size. Both the largest and the smallest known galaxies are elliptical. Very large elliptical galaxies can reach 300 million light years in diameter. Dwarf ellipticals, which are very common, may contain only 1/100,000th as many stars as the Milky Way!

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