Question: What effects would we see on Earth if the Sun wouldn’t turn into a Red Giant? If the…
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Equation for Orbits?
Question: Why does the following equation seem to predict stable orbits around the sun as well as for moons…
Do Gravitational Waves Need a Medium to Travel Through?
Question: Do gravitational waves need a medium to travel. Do they slow down when passing through a medium? —…
The Light-Year-Long See-Saw Conundrum
Question: A lunch friend and I are debating this question. Essentially, consider a see-saw, a board or rod with…
Are We Seeing Stars as They Were in the Past?
Question: If we can see the light coming from stars billion years away, and if some of these stars…
Why isn’t the Precession of the Lunar Nodes Uniform with Time?
Question: I am an amateur naked eye astronomer. I teach astronomy to 6th graders, I read a lot on…