Chemistry, 09.06.2021 18:40 stormserena

In the early 1600's, Galileo used a telescope to investigate dark features on the Sun's surface and used them to calculate the rate of the sun's rotation. What areas of relatively cool gas were Galileo observing? prominences
solar flares
photospheres
sunpsots

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In the early 1600's, Galileo used a telescope to investigate dark features on the Sun's surface and used them to calculate the rate of the sun's rotation. What areas of relatively cool gas were Galileo observing? prominences solar flares photospheres sunpsots

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Another question on Chemistry

In the early 1600's, Galileo used a telescope to investigate dark features on the Sun's surface and used them to calculate the rate of the sun's rotation. What areas of relatively cool gas were Galileo observing? prominences
solar flares
photospheres
sunpsots