by Ann » Sat Jun 23, 2018 6:51 am
geckzilla wrote: ↑Fri Jun 22, 2018 9:28 pm
Ann wrote: ↑Fri Jun 22, 2018 7:24 pm
MarkBour wrote: ↑Fri Jun 22, 2018 6:22 pm
apollo08half.jpg
Okay, forget the Stanley Kubrick moment.
I guess I was imagining this was a shot done similar to Apollo 8's Earth rise,
an image of which I used to have a nice poster.
But then, if the "Blue Marble" image was taken from a flight position in transition from the Earth to the Moon, I'm wondering what the heck that really even means, to say "It has been mostly shown with Antarctica at the bottom, although the actual view the astronauts had was with Antarctica on top." They really would not have had any predominant reference frame to say that, right?
In the iconic picture you posted, Mark, the Earth's oceans are a vivid blue. In the much more recent photo posted by Neufer, the oceans of the Earth are a dull, muted shade of blue.
Is there a reason for that?
Ann
Here's one that's less modified from the original:
https://www.flickr.com/photos/nasacommo ... 059305918/
Whatever we're seeing now had to be digitized from the film versions, so that process can yield varying results. The film itself could have been different, and so could the cameras, lenses, and exposure settings. Plus someone could easily have done some subjective modifications using Photoshop or any other image editing software.
Air glow.
Photo: Miguel Claro.
Thanks, Geck. In the picture in your link, showing the Earth as seen from the Moon in 1969, the Earth's oceans are brilliantly blue indeed, and very different from the recent picture posted by Neufer.
I guess that what I'm asking is if the Earth's oceans have changed color. That is theoretically possible, perhaps, with the amount of trash that has been dumped in them since the days of Apollo. Similarly, the color of the Earth's atmosphere seems to have changed from clear blue to a lot more green and orange because of all the air glow that seems to be present these days. In the picture at left, the band of the Milky Way looks blue, but the sky of the Earth looks anything but.
Whatever we're seeing now had to be digitized from the film versions, so that process can yield varying results. The film itself could have been different, and so could the cameras, lenses, and exposure settings. Plus someone could easily have done some subjective modifications using Photoshop or any other image editing software.
These are very good points. But as a lover of blue things, I'm acutely aware that shades of brilliant blue are unfashionable these days. I simply can't buy blue things the way I used to be able to to buy them, because they don't exist the way they used to. And while Sky&Telescope magazine used to tell me what stars look blue when you observed them, the current expert on double stars and star clusters only ever talks about orange, yellow and white stars.
So what is the most likely reason for "the fading of the Earth's blue oceans and skies"? Technical equipment? A real change of the Earth's oceans and air? Simple fashion?
Ann
[quote=geckzilla post_id=283550 time=1529702894 user_id=124138]
[quote=Ann post_id=283548 time=1529695494 user_id=129702]
[quote=MarkBour post_id=283547 time=1529691735 user_id=141361]
[float=right]apollo08half.jpg[/float]
Okay, forget the Stanley Kubrick moment.
I guess I was imagining this was a shot done similar to Apollo 8's Earth rise,
an image of which I used to have a nice poster.
But then, if the "Blue Marble" image was taken from a flight position in transition from the Earth to the Moon, I'm wondering what the heck that really even means, to say "It has been mostly shown with Antarctica at the bottom, although the actual view the astronauts had was with Antarctica on top." They really would not have had any predominant reference frame to say that, right?
[/quote]
In the iconic picture you posted, Mark, the Earth's oceans are a vivid blue. In the much more recent photo posted by Neufer, the oceans of the Earth are a dull, muted shade of blue.
Is there a reason for that?
Ann
[/quote]
Here's one that's less modified from the original:
https://www.flickr.com/photos/nasacommons/9460163430/in/album-72157649059305918/
Whatever we're seeing now had to be digitized from the film versions, so that process can yield varying results. The film itself could have been different, and so could the cameras, lenses, and exposure settings. Plus someone could easily have done some subjective modifications using Photoshop or any other image editing software.
[/quote]
[float=left][img2]https://i.pinimg.com/736x/53/e8/ae/53e8aefe4d5200652626aec4bc77ff10--rainbow-shots-over-the.jpg[/img2][c][size=85]Air glow.
Photo: Miguel Claro.[/size][/c][/float]
Thanks, Geck. In the picture in your link, showing the Earth as seen from the Moon in 1969, the Earth's oceans are brilliantly blue indeed, and very different from the recent picture posted by Neufer.
I guess that what I'm asking is if the Earth's oceans have changed color. That is theoretically possible, perhaps, with the amount of trash that has been dumped in them since the days of Apollo. Similarly, the color of the Earth's atmosphere seems to have changed from clear blue to a lot more green and orange because of all the air glow that seems to be present these days. In the picture at left, the band of the Milky Way looks blue, but the sky of the Earth looks anything but.
[quote]Whatever we're seeing now had to be digitized from the film versions, so that process can yield varying results. The film itself could have been different, and so could the cameras, lenses, and exposure settings. Plus someone could easily have done some subjective modifications using Photoshop or any other image editing software.[/quote]
These are very good points. But as a lover of blue things, I'm acutely aware that shades of brilliant blue are unfashionable these days. I simply can't buy blue things the way I used to be able to to buy them, because they don't exist the way they used to. And while Sky&Telescope magazine used to tell me what stars look blue when you observed them, the current expert on double stars and star clusters only ever talks about orange, yellow and white stars.
So what is the most likely reason for "the fading of the Earth's blue oceans and skies"? Technical equipment? A real change of the Earth's oceans and air? Simple fashion?
Ann