Moon question
Sep 22, 2013 08:03:17 #
Whitebasser
Loc: East Texas
I could probably find this answer if I studied it more but I know we have some really smart moon people on here. Why does the moon have a "stem core" at the bottom like a piece of fruit that has been picked?
Sep 22, 2013 08:24:23 #
Good question and I am looking forward to someone smarter than I to answer it. While they are at it, maybe that can also advise on my moon issue below.
I was just in Maine shooting the rising moon over the Atlantic. I could not decide if a longer exposure, which blurs the water and likely adds some vibration but allowance for larger DoF, is better than a fast exposure that freezes the water detail at least within the limited DoF. Which makes the better photo technically?
Thanks for letting me piggyback your question.
JH
I was just in Maine shooting the rising moon over the Atlantic. I could not decide if a longer exposure, which blurs the water and likely adds some vibration but allowance for larger DoF, is better than a fast exposure that freezes the water detail at least within the limited DoF. Which makes the better photo technically?
Thanks for letting me piggyback your question.
JH
Sep 22, 2013 08:28:34 #
Sep 22, 2013 08:31:15 #
I'm no expert, but likely nothing more than a crater, caused by a meteor (or some other celestial body) impact at some point over the last few billion years....
Sep 22, 2013 08:49:06 #
John Howard wrote:
Good question and I am looking forward to someone ... (show quote)
I'm no expert but personally I would probably find the longer exposure image more enjoyable due to the effect of long exposure on moving water. However, I would think that use of a graduated ND filter would be necessary as the brightness of the moon would probably get blown out with a long exposure.
edit: just realized you stated rising moon. The rising moon would not be bright, so ND filter probably not necessary
Sep 22, 2013 09:13:13 #
Thanks. Next time I will have with me the filter for that lens.
Sep 23, 2013 06:49:17 #
[quote=Whitebasser]I could probably find this answer if I studied it more but I know we have some really smart moon people on here. Why does the moon have a "stem core" at the bottom like a piece of fruit that has been picked?[/quote
That big crater you are probably talking about at the south pole of the moon is called the Shackleton crater.
It is always there even tho the moon does rotate...but it only rotates once a month...and that puts it in sync with earths rotation...I think thats the way it works...
That big crater you are probably talking about at the south pole of the moon is called the Shackleton crater.
It is always there even tho the moon does rotate...but it only rotates once a month...and that puts it in sync with earths rotation...I think thats the way it works...
Sep 23, 2013 08:14:34 #
Sep 23, 2013 10:59:48 #
Will S
Loc: SW VA
The Moon doesn't rotate (spin on axis) It does rotate around the Earth of course.. but the same side faces us all the time. The moon does wobble.. it's called procession.
As far as photography goes.. light is light..the longer the exposure the greater light is captured.. it's all hit and miss as far as I can see.. filters may increase contrast but you still have to find that sweet spot between exposure/Ap and shutter speed for a good shot.
As far as photography goes.. light is light..the longer the exposure the greater light is captured.. it's all hit and miss as far as I can see.. filters may increase contrast but you still have to find that sweet spot between exposure/Ap and shutter speed for a good shot.
Sep 23, 2013 11:21:37 #
Will S wrote:
The Moon doesn't rotate (spin on axis) It does rotate around the Earth of course.. but the same side faces us all the time. The moon does wobble.. it's called procession.
As far as photography goes.. light is light..the longer the exposure the greater light is captured.. it's all hit and miss as far as I can see.. filters may increase contrast but you still have to find that sweet spot between exposure/Ap and shutter speed for a good shot.
As far as photography goes.. light is light..the longer the exposure the greater light is captured.. it's all hit and miss as far as I can see.. filters may increase contrast but you still have to find that sweet spot between exposure/Ap and shutter speed for a good shot.
I think you mean precession! :lol:
Sep 23, 2013 11:31:52 #
[quote=ggttc][quote=Whitebasser]I could probably find this answer if I studied it more but I know we have some really smart moon people on here. Why does the moon have a "stem core" at the bottom like a piece of fruit that has been picked?[/quote
That big crater you are probably talking about at the south pole of the moon is called the Shackleton crater.
It is always there even tho the moon does rotate...but it only rotates once a month...and that puts it in sync with earths rotation...I think thats the way it works...[/quote]
I think he's referring to Tycho Crater, not the Shackleton at the pole. Tycho has long lines of ejected debris very much resembling the stem location of an orange.
That big crater you are probably talking about at the south pole of the moon is called the Shackleton crater.
It is always there even tho the moon does rotate...but it only rotates once a month...and that puts it in sync with earths rotation...I think thats the way it works...[/quote]
I think he's referring to Tycho Crater, not the Shackleton at the pole. Tycho has long lines of ejected debris very much resembling the stem location of an orange.
Tycho Crater
Sep 23, 2013 11:39:47 #
Will S wrote:
The Moon doesn't rotate (spin on axis) It does rotate around the Earth of course.. but the same side faces us all the time. The moon does wobble.. it's called procession.
As far as photography goes.. light is light..the longer the exposure the greater light is captured.. it's all hit and miss as far as I can see.. filters may increase contrast but you still have to find that sweet spot between exposure/Ap and shutter speed for a good shot.
As far as photography goes.. light is light..the longer the exposure the greater light is captured.. it's all hit and miss as far as I can see.. filters may increase contrast but you still have to find that sweet spot between exposure/Ap and shutter speed for a good shot.
Had to go look it up...more often than not I am wrong...
"But if you looked down on the Earth-Moon system from the north celestial pole, from the perspective of Polaris, the North Star, youd see that the Moon actually does rotate on its axis. In fact, as the Moon travels around the Earth in a counter-clockwise orbit every 27.5 days, it also completes one full rotation on its axis also moving in a counter-clockwise direction. "
Read more: http://www.universetoday.com/19699/does-the-moon-rotate/#ixzz2fjMJWnjM
Sep 24, 2013 07:04:11 #
I'm not positive but I think you are all wrong. That is where the rocks were that the astronauts brought back.
Sep 24, 2013 23:46:27 #
Darn. I am wrong again. I thought that crater was where the cream cheese came from. Gosh darn it all anyway.
Dennis
Dennis
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