by johnnydeep » Sun Feb 27, 2022 9:30 pm
XgeoX wrote: ↑Sun Feb 27, 2022 12:41 pm
Staring into that inky black is exhilarating, awe inspiring and frightening all at the same time. You look at it and it looks at you (Nietzsche was right).
Ann, is that “marble” from the moon?
I wish people would quit complaining about it being a repeat. There ate great shots that deserve to be seen again or for the first time if they were missed earlier.
Hell we have photos here that are millions or even billions of year old!
Eric
Well, the things the photos are taken
of may be millions or billions of years old, but the photos themselves are not! And not even the photons hitting the detector (or your retina) are more than a few microseconds old. At least if the detector is in the Earth's atmosphere. If the detector is in space, I think the photons could be pretty old indeed. But only if there's a direct hit on the detector, unaltered by a lens or mirror. [ This subject came up before, and I believe I'm remembering it correctly, but I'm sure someone will correct me if I'm not
![Smile :)](./images/smilies/icon_smile.gif)
]
And I guess, since photons don't age, the distinction may be irrelevant.
[quote=XgeoX post_id=320955 time=1645965666 user_id=145282]
Staring into that inky black is exhilarating, awe inspiring and frightening all at the same time. You look at it and it looks at you (Nietzsche was right).
Ann, is that “marble” from the moon?
I wish people would quit complaining about it being a repeat. There ate great shots that deserve to be seen again or for the first time if they were missed earlier. [b][i][color=#0000FF]Hell we have photos here that are millions or even billions of year old![/color][/i][/b]
Eric
[/quote]
Well, the things the photos are taken [i][u][b]of[/b][/u][/i] may be millions or billions of years old, but the photos themselves are not! And not even the photons hitting the detector (or your retina) are more than a few microseconds old. At least if the detector is in the Earth's atmosphere. If the detector is in space, I think the photons could be pretty old indeed. But only if there's a direct hit on the detector, unaltered by a lens or mirror. [ This subject came up before, and I believe I'm remembering it correctly, but I'm sure someone will correct me if I'm not :) ]
And I guess, since photons don't age, the distinction may be irrelevant.