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Why isn't Epsilon Indi in HabCat

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1 answer
111 views

Why isn't Tau Ceti in the HabCat?

-1 votes
2 answers
79 views

Are Old Methusalah-type Stars in Faraway Galaxies?

5 votes
4 answers
637 views

Cepheids/supernova vs redshift (for estimating distances)

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1 answer
132 views

Universe expansion not accelerating?

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105 views

In Which Locations Would It Be Possible To Have 4 “Constant” Constellations?

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58 views

What is the role of the mercury-filled tubes in the occulting mechanism on Zeiss planetarium projectors

6 votes
2 answers
768 views

Find Extreme UV data source for the Sun

2 votes
1 answer
88 views

Could cometary non-gravitational acceleration be linked to surface cohesion transitions?

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145 views

Help on calculating the sun's horizontal coordinates

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3k views

Why the moon is blinding me right now?

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88 views

Anisotropic to isotropic term ratio of the radiation field in the LTE plane parallel atmosphere approximation - Choudhuri's textbook

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2 answers
155 views

When we look towards the galactic centre is the plane of the sky perpendicular to galactic plane?

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191 views

Assuming they exist, what would be the strongest observational evidence of quark stars?

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