# ISS046-E-3699

- By: Image courtesy of the Earth Science and Remote Sensing Unit, NASA Johnson Space Center
- Date: 2015-12-29
- Classification: Photograph
- Credit line: Astronaut photography of Earth
- Museum: [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:ISS046-E-3699.JPG)
- Rights: Public domain
- Picture: https://invisiblenetwork.ai/thumbs/commons/thumb/2/25/ISS046-E-3699.JPG/1920px-ISS046-E-3699.JPG
- Who can see it: Kids profiles and older (museums give no ratings; placed by Invisible Network from the museum's own words)

While orbiting over the Gulf of Alaska and moving toward the west coast of the United States, an astronaut aboard the International Space Station shot this panorama looking north into the snow-covered landscape of Canada’s Coast Mountains, the Canadian Rockies, and Vancouver Island. Numerous dark valleys contrast with the brilliant snow, even in the low light of a northern winter. The valleys were eroded by glaciers repeatedly in various ice ages over the past 2 to 3 million years.

Low stratus clouds mask the 250-kilometer (150-mile) wide plateau between the mountain ranges. Above these clouds, a long cloud band slants across the image. Meteorologists think this may be the remnants of a jet stream cloud band. Such jet stream bands indicate the general position of these fast “rivers of air.” Based on its northeast orientation, its altitude, and its linear appearance, the cloud band is in the typical position and orientation of the Polar Jet, which blows northeast towards Hudson Bay, then dives south over the southeastern provinces of Canada. Animated maps of the Polar Jet for the days before this image show a dying branch of the jet over western Canada.

Even in this distant…