Principium 47 preprints Principium 47 will be published in November 2024. These preprints of articles from this issue are now available to members – Interstellar News, eight pages of Interstellar News https://i4is.org/wp-content/uploads/2024/10/interstellar-news-Principium47-2410280851comp.pdf News Feature, abstracts from JBIS and Acta Astronica https://i4is.org/wp-content/uploads/2024/10/The-Journals-Principium47-2410271602-comp.pdf Report from the Space Propulsion Conference 2024 Glasgow, 20-23 May 2024, 9th 3AF (Association […]
Blog
A Precursor Mission to Proxima Centauri
A Mission to Five Near Earth Objects in 2030 Adam Hibberd We at i4is, together with our collaborators on the Phase I NIAC (NASA Innovative Advanced Concepts) at Space Initiatives Inc., have been contemplating precursors to the ultimate mission of sending laser sails to swarm our nearest neighbouring star, Proxima Centauri. A summary of the […]
Deflecting Apophis
Adam Hibberd There have been some developments. I have been addressing the problem of how to deflect Apophis from its path if it were indeed on a collision course with Earth. My Apocalypse Plot gives the magnitude of ΔV at different points in Apophis’s orbit to send it on a course to JUST strike the […]
Members Newsletter – September
The First European Interstellar SymposiumThe First European Interstellar Symposium is happening in Luxembourg December 2nd-5th . Earlybird pricing for registration to the symposium ended on September 30th. Pricing is now 450 Euros ($502). More information can be found here: https://irg.space/first-european-interstellar-symposium/ i4is Presents at NASA NIAC 2024On 12 September 2024, Marshall Eubanks and the i4is team […]
Apophis: More Monolythical Mathematical Musings.
Adam Hibberd Apophis gets awfully close on Friday April 13th 2029 (within GEO altitude). Its orbit is altered by the encounter with Earth and the obvious question is will there be any further possible encounters? Some of you may remember I have worked on the practicalities of sending laser-accelerated sails to intercept Apophis as it […]
Members Newsletter – August
First European Interstellar SymposiumA reminder that the University of Luxembourg’s First European Interstellar Symposium will take place in December 2024, with the IRG’s input and guidance. The Symposium and an Interstellar Art Show will be held at the European Convention Center in Luxembourg City, Luxembourg. This symposium will feature many of the leading voices in […]
Principium 46
Principium 46 has gone out to subscribers and is now accessible to all.
Errors in Velocity Due to an Interstellar Probe’s Fast Encounter with a Star
Adam Hibberd A spacecraft is travelling on a very hyperbolic orbit w.r.t. an object X (possibly a star) which has gravitational mass, μ, meaning the spacecraft is only slightly deflected from its direction of motion. Our task is to quantify the errors in velocity, both longitudinal and transverse, associated with this encounter compared to simply […]