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The Physics of Interstellar Travel
https://www.centauri-dreams.org/2026/06/11/the-physics-of-interstellar-travel/
Published: June 11, 2026 16:13
Coryn Bailer-Jones’ The Physics of Interstellar Travel fills a need which has become apparent only in the last twenty years. Indeed, going back to the turn of the century, one would find the idea of traveling to another star discussed only in relatively…
Observations on ‘The Search for Technosignatures: A Review of Possibilities’
Published: June 5, 2026 18:42
I don’t usually post comments at the top of the site, but I’m making an exception here for a couple of reasons. The recent paper I reviewed by Clément Vidal and colleagues covering technosignatures and strategies for detection is a significant work, the…
Evolving Strategies in the Search for Extraterrestrial Civilizations
Published: May 30, 2026 11:46
Looking for extraterrestrial life in the form of biosignatures will involve peering into the constituents of a planetary atmosphere and identifying out of equilibrium gases that tell us something biological is going on. But here’s the problem, as…
Turbulence Between the Stars
https://www.centauri-dreams.org/2026/05/22/turbulence-between-the-stars/
Published: May 22, 2026 12:54
We’ve come a long way since the days when interstellar space – and even the environment of our own planetary system – was considered empty. Dust and gas between the stars factor into deep space thinking in many ways given their potential uses and dangers,…
Przybylski’s Star: Still Bizarre After All These Years
https://www.centauri-dreams.org/2026/05/15/przybylskis-star-still-bizarre-after-all-these-years/
Published: May 15, 2026 13:29
While I’ve been going through early extraterrestrial ideas like those of Ronald Bracewell I’ve run back into that most unpronounceable of stellar objects, Przybylski’s Star. This one is worth a return look and I was reminded of it by author and futurist…
A Deeper Dive into the Proxima Centauri Swarm
https://www.centauri-dreams.org/2026/05/09/a-deeper-dive-into-the-proxima-centauri-swarm/
Published: May 9, 2026 13:36
I’m always interested in how work on interstellar concepts gets funded. After all, although the Nancy Grace Roman telescope is now ready to fly, with a launch some time this fall, there was a real chance the project might get canceled along the way. Trying…
Moving a Civilization: The Caplan Thruster
https://www.centauri-dreams.org/2026/04/30/moving-a-civilization-the-caplan-thruster/
Published: April 30, 2026 16:57
Because I’ve been talking about enormous structures lately and describing them as ‘big dumb objects,’ I thought it would be fun to revisit the origin of that term. BDOs emerged in what was intended as an April Fool’s joke by writer and critic Peter…
Stability of Interstellar ‘Big Dumb Objects’
https://www.centauri-dreams.org/2026/04/24/stability-of-interstellar-big-dumb-objects/
Published: April 24, 2026 14:41
‘Big dumb objects’ (BDOs) appear to great effect in science fiction. They come in all manner of sizes and shapes and they fulfill a wide range of functions. An early favorite of mine was Cordwainer Smith’s “Golden the Ships Were Oh! Oh! Oh!,” which I…
No Signs of Atmosphere on TRAPPIST-1 b or c
https://www.centauri-dreams.org/2026/04/16/no-signs-of-atmosphere-on-trappist-1-b-or-c/
Published: April 16, 2026 16:39
Waiting to learn what next generation telescopes will reveal is tantalizing in the extreme. In terms of space-based instruments, we’re getting close to launch of the Nancy Grace Roman Space Telescope, which has been the subject of many posts here under its…
Interstellar Probes: Moving Beyond Bracewell
https://www.centauri-dreams.org/2026/04/09/interstellar-probes-moving-beyond-bracewell/
Published: April 9, 2026 19:20
Lately we’ve been discussing interstellar probes, the kind that an extraterrestrial civilization might use to explore the galaxy. Ronald Bracewell’s analysis of such probes dates back to 1960 and was all but coterminous with the emergence of SETI. The…