Sebagaimana tahun-tahun sebelumnya, CASA selalu memperingati hadirnya salah satu even astronomi bertaraf internasional, yakni Hari Astronomi. Astronomi Day tahun ini jatuh pada Sabtu, 7 Mei 2011. CASA, baik Putra maupun Putri merancang acara khusus yang sengaja dipersembahkan bagi para member dan non-member CASA untuk menyambut Hari Astronomi 2011 ini. Berikut laporan CASA Putra:
May 7, 2011 – Opening-
Opening ceremony of Astronomy Day 2011 placed at Astro-Physics Laboratory of PPMI Assalaam (Islamic Modern Boarding School of Assalaam). The activity started at 02:00 PM. The participant of this activity is the students of PPMI Assalaam. There was 90 participants. Ust. Ar Sugeng Riyadi delivered a speech about the introduction to CASA and Astronomy day. This activity closed at 03:00 PM.
May 9, 2011 -Movie Time-
Movie time is activity of wathcing Film together. This activity held at Astro-Physics Laboratory and started at 08:00 PM. The title of Movie we wathced is “The Guardian”. This movie tells about a global warming. This activity finished at 10:00 PM.
May 10, 2011 –Drawing and Painting-
In Tuesday, May 10, the participants following the drawing and painting competititon. The theme of this competition is about universe. Some participant draw aerospace, sun, effect of green house, astronaut, etc. This activity started at 04:00 PM and finished at 05:00 PM. The paintings will display in Astro-Physics Laboratory.
In addition to painting competitions, also held activities to make bulletin board. The theme of the bulletin is about astronomy. The bulletin aslo can be read in Astro-Physics Laboratory.
May 12, 2011 –Closing Act-
The long series of activities no feel had been implemented. Wednesday, May 12, 2011 at 20:00 PM the Astronomy Day 2011 was officially closed by ust. Ar Sugeng Riyadi as supervisor of CASA. Ust. Ar Sugeng Riyadi introduced to the participant to the new telescope “Celestron HD” which will permanently mounted in Dome of PPMI Assalaam. After delivered the speech and introduction, ust. Ar Sugeng Riyadi assisted by Muflih Arisa Adnan demonstrated the installation of new telescope “Vixen”. The closing ceremony finished at 22:00 PM. After closing ceremony, ust. Ar Sugeng Riyadi and Muflih Arisa Adnan attempted to observe the sky by using Vixen. The sky was foggy and cloudly, so we should wait very long. And finally we got the image of Moon and Saturn.