Thank for that link, - those are very interesting images, indeed.
Motivated by your comment, I was further thinking about photographing
distant objects. And I think I realized why our "everyday experience"
tells us that it would be impossible.
Indeed, 400 km (248 miles) is close to the distance from
NYC to Washington DC (~220 miles) and NYC- Boston (~200 miles).
But you wouldn't imagine about photographing details of the Empire State
Building from the Capitol Hill or Old Post Office Building (DC), or from
John Hancock Tower (Boston).
The reason is ... the Earth curvature... If the Earth were flat, we
should've been able to do that...
The horizon from the adult's eye level is just at about 3 miles (4.7 km)
And from 1454 feet (443 m) - The tip of the Empire State building, it is
about 47 miles.
I suspect that this is the reason for our deceived intuition.
In addition to that, the air is cleaner in the higher atmosphere (and also
less dense) than near the ground level, especially around the big cities.
Igor
Matthew Hunt Tue, 01 Sep 2015 05:03:52 -0700 wrote:
On Mon, Aug 31, 2015 at 10:56 PM, Igor PDML-StR <pdml...@komkon.org> wrote:
Seeing the ISS like that, with some recognizable shape is sort of
unreal... I wouldn't have expected that would be possible.
It's sooo cool!
Yeah, on the one hand, when the ISS is directly overhead, it's ~400 km
up, which is kind of surprisingly close. I think of space as "far
away," but the distance is one I could drive in a few hours. On the
other hand, if I imagine photographing something man-made from that
distance, it is kind of surprising that the shape would be
recognizable.
For those who have not seen his work, Thierry Legault is a master of
this kind of photography. His expertise, equipment, and ability to
travel far exceed mine:
http://www.astrophoto.fr/
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