Skip to comments.Astronomy Picture of the Day -- Nauset Light Star Trails
Posted on 10/10/2012 6:01:53 PM PDT by SunkenCiv
Explanation: In myth, Atlas holds up the heavens, but in this scene they seem to pivot around a lighthouse beacon. Photographed with a camera fixed to a tripod, the well-planned 30 minute exposure records star trails in the northern sky, reflecting the daily rotation of planet Earth. Hidden behind the top of the prominent Nauset Lighthouse on Cape Cod, Massachusetts, USA, the North Celestial Pole is at the center of all the star trail arcs. Making a complete circle, 360 degrees, in 24 hours, the star trail arcs cover 15 degrees each hour or 7.5 degrees in thirty minutes. Foreground lighting is courtesy of September 23rd's first quarter moonlight.
(Excerpt) Read more at 126.96.36.199 ...
[Credit & Copyright: Chris Cook]
Staring at the circular trails could make you Nauseted...
The trees to the left of the house look like they’ve been mowed. SunkenCiv, have you been testing your alien defense lasers again?
That is exactly my reaction.
Wish I lived in that house.
They made me stop testing them on ‘the other’ aliens.
Well, the SUN moves, on average, 15 degrees per hour, but since it moves through the sky of “fixed stars” towards the west, they complete about 366.25 revolutions in the time that the sun completes 365.25 revolutions. This means they complete a revolution in a mere 365.25/366.25 of 24 hours or 23 hours 56 minutes 4 seconds ... just to be accurate. This IS astronomy!
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.