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The Bridge: Discuss an Astronomy Picture of the Day • APOD: Sky Full of Arcs (2024 Aug 17)

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So, can I assume that the trail of the Electron rocket was made by a separate set of exposures? It can't just be there over the 2.5 hours of the 50 exposures to make the star trails, can it?
Yes, it probably is. I mean, it could be done either way. But practically, with wide launch windows, the exact time of a rocket launch is so uncertain, easy for them to delay 10 minutes, or 2 hours in this case. So imagine you are the photographer, hiked out to a semi-rural location, get the shot set up at the previously published time, you start taking 3-minute long exposures. But the rocket doesn't launch. You can't get service on your phone. What to do? Just keep taking 3-minute exposures so that you don't miss it. And voila, 2.5 hours later, you've got 49 nice frames for a star trail photo, and 1 frame that includes the launch.

Trying to photograph lightning strikes is a similar experience. But when you get a good one, it's amazing.
Ok, thanks. That makes some sense.

Statistics: Posted by johnnydeep — Sat Aug 17, 2024 8:41 pm — Replies 6 — Views 334



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