Now is a good time for spotting Mercury, currently above Venus in the west after sunset.
As it got darker, I also noticed that the stars were twinking like crazy, flashing through all colors of the rainbow. Absolutely horrible conditions if you want to see details on the Moon or planets. So instead I took the opportunity to make "light paintings" with starlight. Each is a few second hand-held exposure at 300mm. Sirius:Betelgeuse:
Here I defocused Sirius and moved it in a steady straight line, to clearly show the fluctuations. Amazing how all the colors come out.
It's also interesting to see the difference in color/temperature of different stars. Betelgeuse is clearly redder, but its spectrum does still contain a lot of green, and even some blue.