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 […]
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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 […]
Special Announcement: First European Interstellar Symposium – Extended Deadline Call for Papers
The University of Luxembourg’s First European Interstellar Symposium will take place in December 2024, with the IRG’s input and guidance. The Symposium, a Shark Tank competition, and an Interstellar Art Show will be held at the European Convention Center in Luxembourg City, Luxembourg. The symposium will feature many of the leading voices in space exploration, […]
Special Announcement: First European Interstellar Symposium – Deadline Call for Papers
The University of Luxembourg’s First European Interstellar Symposium will take place in December 2024, with the IRG’s input and guidance. The Symposium, a Shark Tank competition, and an Interstellar Art Show will be held at the European Convention Center in Luxembourg City, Luxembourg. The symposium will feature many of the leading voices in space exploration, […]
Principium 45
The May 2024 Issue
Members Newsletter – May
Receiving the Members NewsletterA system fault has meant that the last few new members will not have been receiving the monthly Members Newsletter. We have now updated the list of recipients manually while we find and fix the fault. Members can access all past Newsletters at https://i4is.org/members/.Our apologies for this omission – and we will […]
