THE 2023 GREATER IPAC SCIENCE SYMPOSIUM (GISS) August 31 - September 1, Hybrid* (Cahill Hameetman Auditorium and Online via Zoom) Call for Titles The twenty-third annual Greater IPAC Science Symposium will be held on August 31- September 1, 2023. This year we will have a hybrid symposium to allow for both in-person attendance and online broadcast via Zoom. The Symposium is a forum for presenting and discussing astronomical research carried out at IPAC or in collaboration with IPAC scientists. All members of the Pasadena astronomy community are invited to attend. Attendance is not limited to scientists. The meeting will be streamed on zoom, so if you are not willing to broadcast any sensitive results in your presentation, please contact the GISS co-chairs ahead of time. The format will be 15 min (12+3 for questions) oral talks. We strongly recommend that the speakers be in attendance for their talks. But if you need an exception, please contact co-chairs ahead of time. The talks are meant to be informal and some levity is encouraged! Wondering who all those postdocs and students are? Who is that person you keep seeing at the virtual All Hands? What do all these people around here actually do, anyway? Here's where you can find out! IPAC members (or those with close collaborations with IPAC) who wish to make a contributed science presentation are asked to submit a talk title no later than Aug 4th via the following title submission form: http://giss.ipac.caltech.edu/meetings/2023/form.html Titles may be inventive. If the topic of your presentation is not immediately apparent from the title, we will contact you for further clarification to aid in making the schedule. Abstracts are not necessary. A preliminary schedule will appear on Aug 18th, and the final schedule on Aug 25th. The symposium webpage is available at: http://giss.ipac.caltech.edu/meetings/2023/ For questions, please contact Dave Cook (dcook@ipac.caltech.edu) and Anahita Alavi (anahita@ipac.caltech.edu), GISS Co-chairs.