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Sten
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30
Why can we balance things on our fingers?
Feb 23
29
Why do we say that temperature of Universe is around 2.7 K?
Dec 14, 2023
22
Do blueshifted and redshifted light sources have differing energies?
Nov 19, 2025
22
Where does length contraction occur towards?
May 3, 2024
21
What happened to all of the energy created at the Big Bang when the matter and antimatter annihilated each other?
Sep 24, 2025
19
Is there a Dark Matter Paradox?
Jun 16, 2024
19
Is it accurate to say "space doesn't move"?
Jun 22, 2025
16
Is there a distance from a gravitational source where the influence of gravity and dark energy are balanced out?
Oct 2, 2023
15
Which Potentials lead to Kepler's second Law?
Feb 20, 2024
15
Trajectory in a two-body system (one body fixed)
May 3, 2025

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Where exactly does Physics Stack Exchange draw the line between scientific inquiry and speculation?

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43
What is the shape of orbit assuming gravity does not depend on distance?
28
How would "dark matter", subject only to gravity, behave?
21
What equation tells you how far in space you can go from a point and return?
20
How far apart has the sun drifted from Alpha Centari due to the expansion of the universe since its formation?
19
Is there a limit to the Schwarzschild radius?