djkorchi

7 ms·

1.
by djkorchi 2y ago
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 denominat
2.
by djkorchi 3y ago
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
3.
by djkorchi 3y ago
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
4.
by djkorchi 4y ago
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
5.
by djkorchi 4y ago
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.
6.
by djkorchi 4y ago
Note, the submission to Physics Letters A was completed March 30th, just one day before April Fools.
7.
by djkorchi 5y ago
KeePass + Dropbox works, and you can sync to Android from Dropbox with KeePass2Android.
8.
by djkorchi 5y ago
The parent post said that only observations at dusk and dawn are affected. I'm pointing out that, even at astronomical midnight, large fractions of the sky aren't in earth's shadow. For other wavelengths the shadow is irrelev
9.
by djkorchi 5y ago
The idea of assembling large space telescopes is very exciting, although there are obviously many engineering challenges to solve. What that doesn't yet address is large, ground based radio telescopes. Consider the square kilometer arr
10.
by djkorchi 5y ago
Professional astronomers observe during the daytime too, using radio or microwave. Mega-constellations impinge on their ability to do science, especially for techniques like VLBI, where there's no obvious way to remove satellites from
11.
by djkorchi 5y ago
Are you sure this is true? You can frequently see satellites in the dead of night. Further, they show up quite plainly in non-visible wavelengths like radio or infrared even during the day.