Issue 21 of Principium, the quarterly publication of the Initiative and Institute for Interstellar Studies is now published.
Issue 21 | May 2018

This issue features –
- “Slow down!”: How to park an interstellar rocket
- The Orbits of Seveneves (2) – the orbits explained
- Imagining Interstellar – Art by Efflam Mercier
- 69th International Astronautical Congress 2018 – Papers by the i4is Team
- BOOK REVIEWS:
- Going Interstellar – Build Starships Now!
- Rendezvous with Rama, a retrospective
- NEWS FEATURES –
- Breakthrough Discuss 2018: i4is debate novel propulsion technologies
- PROCSIMA – Diffractionless Beamed Propulsion for Breakthrough Interstellar Missions
- BIS report on nanosats from the UK
- Interstellar News & Project Lyra Update