Invisible by default; this is a pop-up display of Nebular and Stellar Classifications from Star Trek. Each display appears by a trigger word and is cleared by typing "x".

The triggers are:

NebulaA
NebulaB
NebulaC
NebulaD
NebulaE
NebulaF
NebulaG
NebulaH
NebulaI
NebulaJ
NebulaK
StellarO
StellarB
StellarA
StellarF
StellarG
StellarK
StellarM
StellarL
StellarT

To clear the displays type "x".