What to see in the night sky?
I have been watching the sky frequently the last few years, and been lucky to experience some skies so clear there were stars everywhere even touching the sea (in islands in the pacific with no civilisations 2000km around)… There I realized that we were one among billions of billions of planets in this amazingly infinite universe…
I have seen many shooting stars, satellites, meteors leaving beautiful trails, spent hours watching the moon… I have once seen a light flashing six times, at slightly different locations, one night with a friend… I have met a sailor who has seen some strange repeating light patterns at night in the sky, at some times his 40+ years travelling the sea using the stars…
The sky can be quite active at night with many different lights, the moon, stars, shooting stars, meteors, planes, UFOs…
Software to locate stars and planets
Stellarium is a software which gives a nice view of the night sky with stars, constellations and planets. This open source software is fun to use, and inspiring in terms of usability: I’m a big fan! It even draws the mythology artistic view of constellations.
Software to detect moving lights (shooting stars, meteors and UFO watch!)
I have been searching for a software that analyses the night sky. It would be interesting I thought to build a software that would analyse a video camera output filming the sky in real time. The video analysis software could run on a low-power mini computer where the camera is plugged in, and would run all night long. The program would automatically detect fast and slower moving objects such as shooting stars or planes. The software would then keep a video extract of all detected objects. It would send a daily or weekly email with all detected objects, and would upload them to youtube for viewing for example.
The software would be free open source sofware released under the GPL license. It would be written in Python or maybe Java, using an open source library to acquire the video output from the camera and be able to process it at least 30 frames per second or however the frame rate of the camera.
Video camera to film the night sky and film stars
For this project we would maybe at first optimize the algorithm for a particular camera output. Ideally the camera would cost less than 300 $.
It would be maybe monochrome as to have a better sensor to detect fast moving objects such as detecting shooting stars.
Video analysis algorithms
Armed with the camera and a low-power computer, we would execute the software which would connect to the camera, grab the video and analyse in real time.
The algorithms to detect moving objects is pretty easy to write. We would also look for flashing lights, slow moving objects.
An important part of the algorithm will be to detect clouds and not confuse clouds with moving objects.
The algorithm would ideally ignore all clouds and slight rain. It should however detect planes with lights, shooting stars, UFOs, satellites, etc.
It shouldn’t be very complex to implement but we shall document any interesting findings.
Conclusion
The project is a Free software that analyses the night sky and detect shooting stars and meteors. The sofware would run all night while we are sleeping. When interesting things are found (meteors, etc.) they can be tagged in youtube for example, and a community could start sharing interesting findings.
If many people start using around the world, such a project would help users connect with each other, and maybe also could help detect automatically moving phenomena in the sky.
For more information about moving lights see: spaceflare.com. List of Softwares and ressources, Guide: UFO Capture setup [fr] and camera setup [fr]. Also Meteor Hunter system architecture
How you can help? if you know good video camera to film at night the stars, if you know a good video library to get the video content and analyse it (in Python or Java for example), or if you are interested, please leave us a comment below…