APOD Oct. 12, 2004

J.Dz · Post by **J.Dz** » Tue Oct 12, 2004 8:10 pm

M3 Inconstant Star Cluster time lapse movie shows many stars changing brightness in synchronism? is this truly happening?

Also noticed one larger star just low and left of center appears to have a sunspot (starspot) appear! Is this a photograhic anomoly?

Thanks,
JD

makc · Post by **makc** » Wed Oct 13, 2004 2:04 am

I think "in sync" is illusion caused by continuous re-play and low framerate (so things that have changed its brightness at different time inbetween are just shown in every new frame all together, and then again, and again...)

For example, take two or three shots of the crowdy street with 1sec delay, and make a movie. It will reveal that all people make their moves "in sync"