Posted by Ellen

Last month, Hank joined a group of Montanans climbing in the Andes, summiting above 18,000 feet in the middle of the Peruvian winter. They were closer to the Milky Way up there.

Posted by Ellen

Japan's Mount Fuji, just before dawn.

This is a pretty spectacular photo, with the features of an iconic landscape dwarfed by a skyful of stars and clouds and hints of daylight. Modern cameras can capture this sort of scene more or less routinely if they are set up to stare into the night, lens wide open, without blinking or moving for, in this case, twenty seconds.

The human eye could drink it in at a glance, if only we were there. But we weren't there, sadly. This morning, we must make do with the picture, and fortunately it's a picture that rewards a slowly wandering eye with pleasant little discoveries in the realms of shadow and glow, detail and hulk, pattern and emptiness.

Posted by Ellen

At about one o'clock in the morning of July 1, 2011, Manuel Claro pointed his camera up at the night sky above Alentejo, Portugal, and opened the shutter for 30 seconds. Then he did the same thing again and again and again, 430 exposures over the next four hours, and combined all the images to create this picture.

During each 30-second exposure, the earth rotated a little, while the stars pretty much stood still (by comparison). So the image of each star is smudged as the camera moves a bit; when all 430 of the smudges are shown together in a single image, we see what looks like startracks but is actually a single earthtrack, circling Polaris, the North Star.

The different colors of the different startracks reflect differences in temperature of the various stars.