On the vernal equinox at noon what is the hour angle of a, Ask an Expert

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On the Vernal Equinox at noon, what is the hour angle of a star with a right ascension of 2 hours?

On the summer solstice at midnight, what is the hour angle of a star with a right ascension of 22 hours?

A star is on the observer's meridian. What is its hour angle?

A star is on the celestial equator and the eastern horizon. What is its hour angle?

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