28 replies to this topic

[MtnBrewer]

I'm in partial agreeance with that. What I'm saying is that the max gravitational pull would be during new moon and the min gravitational pull would be during full moon. The effect would be increased during the conjunction of perigee and new moon or apogee and full moon.

[Mynameisluka]

I'm in partial agreeance with that. What I'm saying is that the max gravitational pull would be during new moon and the min gravitational pull would be during full moon. The effect would be increased during the conjunction of perigee and new moon or apogee and full moon.

ahh...nah, the lowest gravitational pull is actually during first quarter and third quarter.

[MtnBrewer]

I think you mean the lowest tides are 1st and 3rd quarter.

[Mynameisluka]

I think you mean the lowest tides are 1st and 3rd quarter.

same thing. the increased tides during new and full moon are caused by increased gravitational pull due to teh sun moon and earth being aligned.

[MtnBrewer]

same thing. the increased tides during new and full moon are caused by increased gravitational pull due to teh sun moon and earth being aligned.

It's not the same thing. The gravitational pull is less during full moon because the moon is on the other side of the earth from the sun, yet the tides are higher.

[Mynameisluka]

It's not the same thing. The gravitational pull is less during full moon because the moon is on the other side of the earth from the sun, yet the tides are higher.

ok, first. the gravitational pull of the moon never changes during a phase (it only changes due to apogee and perigee). going back through some of my comments to you, i somewhat misspoke by saying things like "i do believe that there is a slight difference in the gravitational pull between a new moon and a full moon". i want to clarify now that i meant "i do believe that there is a slight difference in the combined gravitational pull between the sun and moon between a new moon and a full moon"second, the gravitational pull from the sun never changes.however, during a full moon and a new moon, the gravitational pull from the sun and moon combine to create higher tides. this goes back to what i was initially saying...

there are some gravitational effects during the full moon that could potentially impact fermentation (not sure if there is any science behind it or not). but, if that is the cause, the same impact would be noted during the new moon.

ETA, and it is in fact due to a combination (not addition) of the sun and moon's gravitational pull that we have higher tides during both full moon and new moon. this is because a celestial object creates a tidal bulge on both sides of teh planet. when the moon and sun are aligned (regardless of full moon or new moon), you have the moon creating a tidal bulge on both sides of the planet that is enhanced by the sun's tidal bulge on both sides of the planet. during 1/4 and 3/4 moon, the moon's tidal bulge is 90 degrees off from the tidal bulge of the sun.what does it all boil down to? like i said way above, i doubt that any of this would have any impact on something as small as a fermenter.

Edited by chris, 28 September 2010 - 10:37 AM.

[MtnBrewer]

Ok, I'm in agreement with all of that I think. The reason I was focusing on the pull of gravity and not the tides is that in a fermenter, there would be no tides since it is not in contact with the ocean. All that the yeast could possibly know about is the pull of gravity, which would be at a maximum at new moon and a minimum at full moon.

[japh]

No, the moon can be in any phase at perigee. A full moon at perigee would have an ever greater gravitational pull due to the combination of perigee and syzygy. In other words, there is a stronger gravitational pull from the moon during perigee due to the moon being closer to earth. There is a stronger gravitational pull during syzygy due to the alignment of the sun, moon, and earth. There is an even greater gravitational pull when syzygy and perigee happen at the same time.

Regardless, syzygy is an awesome word.

[BrewDaddy]

I've found a bunch of references to animals than only mate during a full moon, which definitely has more to do with their systems being in line with the lunar cycle than gravity. Wondering if this makes yeasties more active during this same period.Also, + a billionty for proper use of syzygy