I've been hooked on the recently installed HD feeds from the International Space Station.
As if the stunning vistas of Earth weren't enough there are multiple sunrises and sunsets each day if you're patient. The ISS takes a little over 90 minutes to orbit the Earth so you don't have to wait too long for a scenary change.
Here's a sequence showing sunset.
The time elapsed from first to last picture was about 10 minutes. Sunset took less than a minute. The Sun transformed from a dazzling white light to brilliant orange as the ISS moved into Earth's shadow. Another sunrise followed about 40 minutes later.
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Dr Adrian Jannetta. Amateur astronomer, maths teacher and science enthusiast.