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5 Questions

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Why does Io cast a hard shadow on Jupiter, but the Moon casts a soft shadow on Earth?

the-moon solar-eclipse io

May 26 '20 at 9:10 Chappo Hasn't Forgotten Monica 1,168

2

17

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1

answer

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Why do planets and satellites in the Solar system look so wildly different if they came from more or less the same matter?

planet solar-system natural-satellites planetary-formation proto-planetary-disk

Jan 12 at 8:33 ProfRob 93.8k

11

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How do we know that an exoplanet is tidally locked to the parent star?

orbital-mechanics exoplanet rotation

Feb 5 '19 at 19:26 Community♦ 1

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Why isn't the relativistic jet visible in the image of the M87 black hole?

black-hole radio-astronomy m87 astronomical-jet

Apr 12 '19 at 8:25 stackzebra 1,199

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Throughout the year, are all parts of the night sky visible from any given point on Earth?

amateur-observing observational-astronomy night-sky

Sep 23 '18 at 11:26 James K 66.4k

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