Talk:Lunar day

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—Yamara ✉ 20:34, 17 March 2008 (UTC)

[edit] old talk

Hello sir, I need some help from you. How one can convert the english calendar into an Hindi calendar. How to calculate the panchangam ? is there any standard rule to follow it ? How one should approach this ? you can sent the details to my mail address sss_2k1@rediffmail.com

Regards Siba

[edit] Equivalence?

The article currently states, regarding the Lunar day: "Equivalently, it is the time it takes the Moon to make one complete orbit around the Earth and come back to the same phase. It is marked from a New Moon to the next New Moon." Is this correct? It seems to me that the point one the Moon's surface directly opposite the Earth varies due to lunar libration, so the time of the new Moon varies as well, but this should not affect when an observer on the Moon observes the Sun at zenith, say.--agr 17:03, 1 July 2007 (UTC)

The period the article describes corresponds to the Synodic_month#Synodic_month, the "month of the phases". I agree that due to libration the position of the Earth in the lunar sky will vary, but wouldn't the same oscillation also affect the Sun's position in the lunar sky? Phases are based on the illuminated fraction, seen from the Earth, but not on which exact lunar hemisphere it is a fraction of. I hope this helps. Hertz1888 03:57, 2 July 2007 (UTC)