In one of the changelog, they announced new emojis/symbols for chat that required special keys and stuff. Ive been trying out a lot of things on my keyboard but i only found 4 of them: fish: ctrl+alt+column sun: ctrl+alt+x heart: ctrl+alt+z starbound logo: ctrl+alt+4 Let me know if you found more and if this was helpful. As an extra tip, someone on a server was able to write a penguin emoji using shift+3, but he mentionned his keyboard was set on german. Edit: alt 166 makes the skull emoji, alt 167 the smiley man and alt 21 makes the penguin.
Which one did you try: alt and numbers or ctrl + alt (alt gr) ? Try copying these symbols in chat: ª º §