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Retired applied physicist/engineer, and amateur astronomer for many years.
No questions with score of 5 or more
Are there any double stars that I can actually see orbit each other?
Recording Spectral Lines at Home
How "fast" do astronomical events occur?
Locate stars in sky from list of (x, y) co-ordinates
How (the heck) does Astrometry.net work?
Is there a maximum Julian day?
Why does ionizing radiation hamper radio communication?
What is the coordinate acceleration for pure radial motion?
If the space is expanding near the speed of light or the speed of light, why Andromeda is approaching or coming near to our galaxy (Milky way)?
Using a 2" filter on the 1.25" adapter
Calculating Field of View of a Telescope Given Time of Another Object