Stargazing Night with Handmade Mirrors (31-5-2013)

Last year, a few students grinded 6 inch mirrors after their HKDSE. Tonight, we set one up to observe the best celestial objects that the spring sky had to offer. The mirror worked perfectly, resolving the Cassini division of Saturn and the millions of pin-point stars in Omega globular cluster all the way to the busy core.