Join in expert discussion on the topics of Astronomy and astrophysics. This may include discussion on celestial objects, space, and the physical universe as a whole. Mainstream science only.
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Undergrad
Spectral and Luminosity Classification
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Undergrad
Why 24 hours for right ascension?
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Undergrad
Mirroring sun with parabolic dish
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Undergrad
The Mysterious Plane of Planetary Orbits
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Undergrad
Gliese 581c/d and their Red Sun?
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Undergrad
Why do gas planets not collapse?
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Undergrad
What Would a Nebula Look Like Close Up?
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Undergrad
Photon radiation, how does it work?
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Undergrad
GRBs & Supernova: What's the Connection?
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Undergrad
Saturn Rings: Age and Permanent Feature
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Undergrad
Question about curvature of space
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Undergrad
Sunrise on Uranus: How Often at S. Pole?
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Undergrad
What Happens in Black and White Holes?
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Undergrad
Albedo and reflected light from the moon
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Undergrad
Gravitational lensing and Dark matter
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Undergrad
Mercury: Why Doesn't it Vaporize Away?
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Undergrad
So , we don't know how universe began?
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Undergrad
Developments in Space Exploration
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Undergrad
Is Earth's Orbit Shifting?
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Undergrad
What is the capacitance of the sun?
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Undergrad
How did the heavier elements form?
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Undergrad
Mean Orbital Separation Question
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Undergrad
Moon's orbit & length of day/month
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Undergrad
Airship Rotating Earth: Can it be Done?
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Undergrad
Orbits: explicit r(t) and theta(t)
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Undergrad
The Earthly Risk of Rogue Black Holes
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Undergrad
Habiting Planets: Is It Possible?
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Undergrad
Question: Mass distribution in galaxies
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Undergrad
Spacetravel: t as a function of a and d
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