Issue 27 of Principium, the quarterly publication of the Initiative and Institute for Interstellar Studies is now published.
Issue 27 | November 2019

This issue features –
- On a possible future direction for optical SETI
- IAC Oct 2019 — First Report
- How to reach Interstellar Visitors — Optimum Interplanetary Trajectory Software
- How low can you go? — The Benkowski equation
- i4is Members Page & Become an i4is member
- Interstellar News