A galaxy that is basically one large, smooth shape is which type?

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Study for the Earth Science Standards of Learning Test. Use flashcards and multiple choice questions, with hints and explanations for each question. Prepare for your exam efficiently!

Multiple Choice

A galaxy that is basically one large, smooth shape is which type?

Explanation:
Galaxy shape tells us how stars are arranged and how much gas and dust the galaxy has. A galaxy that appears basically as one large, smooth shape with no obvious arms or disk structure is an elliptical galaxy. The smooth appearance comes from a fairly uniform distribution of stars and little interstellar material, so there aren’t prominent regions forming new stars to create bright, winding arms. Spiral galaxies show distinct arms and a disk; lenticulars look like a disk with a central bulge but lack clear spiral arms; irregular galaxies lack a regular, smooth form and appear chaotic. So, a smooth, featureless galaxy is best described as elliptical.

Galaxy shape tells us how stars are arranged and how much gas and dust the galaxy has. A galaxy that appears basically as one large, smooth shape with no obvious arms or disk structure is an elliptical galaxy. The smooth appearance comes from a fairly uniform distribution of stars and little interstellar material, so there aren’t prominent regions forming new stars to create bright, winding arms. Spiral galaxies show distinct arms and a disk; lenticulars look like a disk with a central bulge but lack clear spiral arms; irregular galaxies lack a regular, smooth form and appear chaotic. So, a smooth, featureless galaxy is best described as elliptical.

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