Telescope Making at Lawrence High School

Hello Everyone,

On March 10, Andy and I had the pleasure of assisting Mr. Johnny Gelsomini’s Astronomy Class with a telescope making activity. The activity had the students measure the focal length of each lens needed for the telescope, the objective lens and the eyepiece. From there the students were tasked with an engineering challenge where they worked in groups to make a telescope using two cardboard tubes of different sizes, a sheet of foam-like material, the two lenses, extra cardboard, caps for the cardboard tubes, scissors, and tape. While each group had the same basic shape for the telescope, they all had slightly different methods of securing the lenses in place. Some used extra cardboard and tape while others used the caps for the cardboard tubes and everything in between. Once students got the chance to look around with their telescopes, we talked about why the images seen were upside-down and how magnified the objects being seen were. We were so impressed with the problem-solving skills that the students were displaying while constructing their telescopes and the knowledge that they already had about telescopes and light. We would like to thank Mr. Gelsomini for allowing us to come in and his students for being amazing. We look are looking forward to helping out again soon!