Busy Night Sky: Timelapse Stars, Satellites, Meteors, and Aircraft Trails V11842




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Published on Jul 17, 2012

Full screen HD with lights out recommended to see all the faint objects...

It's amazing just how much stuff is flying around over our heads all day and night. Sunlight obscures most of it during the day, but at night the view is much better.

This short video is composed of two scenes; The first is a typical long exposure timelapse sequence filmed for about 3 hours, beginning at dusk. The second shows the same sequence with the accumulation of every significant object's trail, made using a painstaking and proprietary compositing technique developed by JCMDI.

The short, regular gaps in between the otherwise solid light streaks are the short periods of time when the shutter is closed in between frames.

Navigation lights on aircraft are the most prominent objects in the sky, being both bright and colorful. Flashing strobelights which help make them visible to other aircraft appear as dots and dashes alongside many of the streaks.

Not so easy to see are satellites. Even though there are hundreds of them, most (if not all) do not emit any light of their own and are only visible when sunlight reflects off of them. This usually happens just after dusk and just before dawn when the sun can still hit the satellite but not the atmosphere overhead. They appear to be faint, slow-moving stars which fade-in and fade out as they pass overhead. Some of the larger ones, such as the International Space Station (ISS) can appear quite bright at times, and may be the object which appears at 0:38 (1:17 in the composite sequence).

Less common although usually easy to see are meteors. At least two faint ones appear in this sequence at 0:19 and 0:40 ( 0:59 and 1:18 in the composited sequence) near top center screen. They are very fast-moving and usually appear in only one frame, so are often hard to spot in long-exposure time lapses but easy to see in the composite sequence.

Equipment used: Canon 5D Mk2, Sigma 20mm f/1.8 prime lens, Studiohut intervalomenter/timer, 10 sec exposure at f1/8, ISO 4000

The soundtrack is "Misty Night" from the "Red Dawn" CD by Technician (yours truly), album and single track available on iTunes https://itunes.apple.com/us/album/red... Full artist discography, CDs, and MP3 downloads available at HTTP://technician.jcmdi.com

Note: This is copyrighted material, however, you may download this footage directly from YouTube and use it free of charge in your own non-profit/non-commercial YouTube videos, school projects, etc. The full free usage policy and YouTube copyright notice/ad info can be found here (please read before using JCMDI material): http://jcmdi.com/stockfootage/faq.htm... http://jcmdi.com/stockfootage/faq.htm...

Enjoy the show!


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