Image: NASA's Earth Observatory. Click to enlarge.
Sun glints off the surface of Lake Ontario in the lower right corner of this image taken recently by astronauts on board the International Space Station.
The mirror-like effect is known appropriately as sunglint.
NASA’s Earth Observatory reports the picture was taken when the station was over southeast Nova Scotia and about 740 miles from the centerpoint of the image.
From this perspective you can see Lake Huron’s Saginaw and Georgian bays above and to the right of Lake Ontario, and the Finger Lakes of New York to its left.
Sunglint also highlights Lake Erie to the west, but the angle makes it appear duller than Lake Ontario.
Click the image for a better view.