Stars other than our sun normally appear featureless when viewed through telescopes. Yet astronomers can readily use the light from these stars to determine that they are rotating and even measure the speed of their surface. How do you think they can do this?

Stars other than our sun normally appear featureless when viewed through telescopes. Yet astronomers can readily use the light from these stars to determine that they are rotating and even measure the speed of their surface. How do you think they can do this?

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Question

Stars other than our sun normally appear featureless when
viewed through telescopes. Yet astronomers can readily use the light
from these stars to determine that they are rotating and even measure
the speed of their surface. How do you think they can do this?

Expert Solution