• January 19, 2023 (Using the pinhole camera principle for a very simple and safe observation technique, cycle 25)
• July 16 & 17, 2022 (A new filtering method, cycle 25)
• July 3, 2021 (cycle 25)
• April 21 & 24, 2021 (Herschel wedge first light, cycle 25)
• Year 2016 (cycle 24)
• May 6, 2015 (cycle 24)
• October 21, 2012 (cycle 24)
• Year 2002 (cycle 23)
• May 2001 (cycle 23)
• March 2001 (cycle 23)
• Year 2000 (cycle 23)
• March 1989 (cycle 22)