Talk:New moon
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[edit] Formula
The formula D = 5.597660 + 29.5305888531*N + 102.19E-12*N*N is completely baffling at first, because it looks as if E is a constant, like D, and -12*N*N is the final term. It could be made much clearer very simply, e.g.
D = 5.597660 + 29.5305888531*N + (102.19E-12)*N*N
so I'll do that - but are there not conventions for writing formulae that would help here?
- How about this (see in Wikipedia:How to edit a page for how to create math):
- D = 5.597660 + 29.5305888531*N + (102.19*10-12)*N2
- andy 11:45 Mar 7, 2003 (UTC)
[edit] New Moons/Year
How many new moons are there per year? -Lommer | talk 04:20, 21 Jan 2005 (UTC)
- At least twelve and no more than thirteen, depending on what year it is. --Eric Forste 05:29, 21 Jan 2005 (UTC)
- An average of about 12.36827 . This has been approximated by 12 7/19 (Metonic cycle) and is more accurately approximated by 12 123/334 or 12 130/353. -- Karl Palmen 21 Jan 2005 09:30 (UTC)
[edit] The Picture
The picture at the top of the page doesn't have any context. It could be interpreted as an indication of what time of day different moon phases occur every day. The moon takes roughly 29.5 days to pass through each phase.
It would be a good idea to actually note what this diagram is indicating.--Jcvamp 19:28, 3 August 2006 (UTC)
[edit] How long does it last?
How many days does the new moon last?
