Lewin's Challenge: 360 Degree Star Trails : FYI

[J A Byrdlip]

Over at APOD, the following was posted ( http://apod.nasa.gov/apod/ap110717.html):

""Walter Lewin, though, has asked APOD to pose this as a challenge to astrophotographers: create a real single-exposure image of a clear night sky that features 360 degree star trails.""

[Josh Sudweeks]

have fun shooting up in the arctic circle in winter. I'll let someone else take that shot.

[J A Byrdlip]

@sudweeks on my list for early October in NorthCentral Washington

[Josh Sudweeks]

@byrdlip - You're still way too far south to get full 360 degree star trails. The shot you posted is really cool, but it's only a few degrees. In order to get 360 degrees, it'll take a 24 hour shot, and in most places on earth, the sun will come up during that time. You have to be well within the arctic circle in the winter so you can take the shot during a polar night.