Will future astronauts draw their inspiration from 'Moonbase Alpha'?

Text Chat- Players without a microphone can talk to their teammates using the Chat Box. Press ENTER to activate the Chat Box, type your message, and press ENTER again to send it. If you want to hear all messages sent to the Chat Box, you can turn on the "Text to Speech" capability in the Options menu.

VOIP- Use VOIP (Voice Over Internet Protocol) for instant voice communication with your team members. You must have a microphone installed in order to use this feature. Hold the ‘Z’ key to talk.