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James K

Ut Hoy!

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74 The moon has just the right speed not to crash on the Earth or escape into space. What are the odds? Jan 30
71 Are photons aged? Feb 23 '20
63 Why is Starlink polluting the night sky a big concern if we have space telescopes? Apr 19
60 Why isn't the asteroid belt affected by Jupiter's gravitational field? Feb 9 '20
59 Do our sun and moon have names? Nov 30 '20
55 How did Eratosthenes know that the sun is far away? Sep 14 '20
55 How can comets have tails if there's no air resistance in space? Apr 23 '20
52 How do scientists know that distant parts of the universe obey the physical laws exactly as we observe around us? Sep 27 '20
51 Why are the time zones calculated as 360°/24 and not 361°/24 or 360°/23.933? Sep 25 '20
47 If all stars rotate, why was there a theory developed that requires non-rotating stars? Aug 21 '19
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