Amateur astronomy refers to the hobby of observing and studying the objects and phenomena in the night sky, such as stars, planets, and galaxies, without being a professional astronomer. Full definition
One of my greatest joys in amateur astronomy has been in building my own equipment. (space.com)
Madrid About Blog Amateur Astronomy Blog by Roberto Ferrero. (blog.feedspot.com)
Dave has spoken widely to amateur astronomy groups, logged many hundreds of hours at the eyepiece, and written eight books on astronomy. (discovermagazine.com)