HackerTrans
TopNewTrendsCommentsPastAskShowJobs

djkorchi

no profile record

comments

djkorchi
·2 tahun yang lalu·discuss
No, because it would create a contradiction. If a "perfect, endless repeat of pi" were eventually found (say, starting at the nth digit), then you can construct a rational number (a fraction with an integer numerator and denominator) that precisely matches it. However, pi is provably irrational, meaning no such pair of integers exists. That produces a contradiction, so the initial assumption that a "perfect, endless repeat of pi" exists cannot be true.
djkorchi
·3 tahun yang lalu·discuss
Is there actually a balance needed between pressure and collapse? Radiation pressure presumably doesn’t do anything to the constituent dm particles. Similarly, wouldn’t the particles in the star be on various elliptical trajectories and not collapse?
djkorchi
·3 tahun yang lalu·discuss
The precession of mercury has a few contributions. The largest is the tug of planets (500 arc seconds/century), the next largest is from general relativity (50 arc seconds /century). There are other, smaller contributions stemming from the sun being oblate. Knowledge about the anomaly in the precession was partly what motivated Einstein, and was one of the early predictions of the theory.
djkorchi
·4 tahun yang lalu·discuss
Wow! It's amazing that I can run python in my browser using an IDE that feels like my daily driver. Even the little keyboard shortcuts, ctrl+} to indent a line of code worked as expected. I became so immersed I accidentally used alt+f4 to close a terminal window, and instead closed my browser!
djkorchi
·4 tahun yang lalu·discuss
Geosynchronous orbit is at 37,000km (well above ISS which iirc is at 400km), so by most definitions that is in space. Often that threshold is put as low as ~100km, when the atmosphere becomes too thin to support winged flight.