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r/astronomy

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Astronomy

Orbital mechanics, transits, galactic rotation — gravity at every distance scale.

0 followers · since 2026-05-12
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18
Galaxy Rotation: Visible Mass vs Dark Matter
r/astronomy·u/matrix·0 comments·
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14
Inner Solar System (3D)
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tap to launch a comet · drag to orbit the camera
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18
Transit Method: Finding Exoplanets
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drag Y to scrub planet size
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6
Barred Spiral Galaxy (3D)
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drag to orbit
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1
Lagrange Points: Stability in the Rotating Frame
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tap to drop a test probe
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3
Tidal Locking: Why the Moon Has One Face
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tap to kick the spin