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What is the period of Mercury from aphelion to perihelion compared to perihelion to aphelion

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Grimaldi
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1 answer
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How to calculate the rise set and transit for specific day?

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RicardoTM
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2 answers
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Is gravity really caused by gravitational time dilation?

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controlgroup
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Is it possible to conclude the expansion is accelerated only from distance modulus vs redshift

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Peter Erwin
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1 answer
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CMBR: Is the cold spot a hint at the edge of the universe?

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sheyahi
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1 vote
1 answer
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Accelerated expansion

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Fabien
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1 answer
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Stellar Pulsation

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Reza Koohpaee
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Apparent RA-Dec value with geocentric observer didnt match between Skyfield and Horizons

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Brandon Rhodes
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2 votes
1 answer
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Is it enough that it's night (sun 18 degrees below horizon) for astrophotography?

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Grimaldi
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2 answers
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What difficulties still exists in astronomy that could be solved (partially) with Machine Learning?

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sheyahi
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3 answers
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Why does the moon appear on cloudy night sky?

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sheyahi
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12 votes
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376 views

Crab Nebula Time Period

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Mithoron
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Someone explain how a naked singularity is possible

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shim
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Python Lightkurve execution from pyroid 3 on android mobile

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Jijo Mathew
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