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Sten
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29
Why do we say that temperature of Universe is around 2.7 K?
Dec 14, 2023
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22
Where does length contraction occur towards?
May 3, 2024
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21
What happened to all of the energy created at the Big Bang when the matter and antimatter annihilated each other?
Sep 24
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19
Is there a Dark Matter Paradox?
Jun 16, 2024
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19
Is it accurate to say "space doesn't move"?
Jun 22
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17
Do blueshifted and redshifted light sources have differing energies?
2 days ago
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16
Is there a distance from a gravitational source where the influence of gravity and dark energy are balanced out?
Oct 2, 2023
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15
What's the argument(s) against dark matter being "normal" baryonic dust?
Mar 12, 2024
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15
Trajectory in a two-body system (one body fixed)
May 3
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Which Potentials lead to Kepler's second Law?
Feb 20, 2024

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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?