Hologram

"Help me, Obi-Wan Kenobi, you're my only hope *static* Help me, Obi-Wan Kenobi, you're my only hope."

- Leia Organa's message to Obi-Wan Kenobi

A hologram was a visual projection of a person or object, generally used for communication or entertainment purposes.

Members of the Jedi Council often dispatched to missions on remote worlds, nevertheless regularly participated in Council meetings held at the Jedi Temple by appearing as holograms.