My Dutch friend Jarsto and I had decided to go to the Fantasticon, so we both had week end tickets, and went to register Friday evening.
The theme for this years Fantasticon was Steam Punk, and it was quite fun to see people dressing up.
It was good to meet many old scifi friends, and get to meet a few new ones.
I went to the con, arriving about 1230.
More chatting with other fans, and then attending two program points :
Author interview with Lavie Tidhar, who was quite interesting and amusing to listen to. I just might find some of his books to read.
The second was Edmund Schluessel who talked a bit about cosmology, and told the story of two Danish astronomers :
Tycho Brahe who made as accurate measurements of the stars and planet’s positions and movements as is possible without telescopes. Yes, he did that before the invention of telescopes. He provided a massive amont of data, but did not d9o too much with it, but Johannes Kepler could use the data to form his theory and formulas for the movements of tha planets.
Then the talk went into measring the speed of light. Old measurements made with distances on Earth yielded no measurable delay, and light speed was deemed to be infinite, or in any case, not measurable. That was about to change.
Ole Römer who did use a telescope, among others to watch the moons of Jupiter. He noticed a discrepancy in the timing of eclipses of Jupiter’s Galilean moons, and by seeing the difference in timing when Jupiter was near conjunction with the sun, and in opposition to the sun, he measured the offset in timing and arrived at the conclusion that light does indeed have a finite speed. His result, made with the instrumentation and math of 1676.
He arrived at a speed of 200 000km/sec, which is excellent, considering the instuments used, and within a margin of about 30%.
I live a few km from the remains of Römer’s old observatory, and the Kroppedal museum nearby with some of the instruments used in the observatory, and asked if he knew about it. He did not, and I offered to bring him there for a visit, if he should visit Denmark again. He liked the idea, so we exchanged contact information.
After the talk we had an interesting conversation about science fiction and science in general, so I had an excellent Saturday at the con.
I was arriving a bit earlier than on Saturday, and, as usual having some talks with other fans.
In the afternoon there was a recording of a podcast by two groups. The Danish “Hva’ Fan” podcast and the Swedish “Fandompodden” , making a single podcast, spoken mostly in English. I took some pictures of the recording session.
Finally there war an interview with and a reading by the Danish writer Marie Ladefoged.
I came home with 3 books from the convention, two by Marie Ladefoged (in Danish), and one by Justina Robson.
I had a fun time, and I am looking forward to going to more conventions next year.