Green Baron

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About Green Baron

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    In my orbit the sun never sets

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  1. I just realized that the sun will be ~40% occluded when it sets here. Looks like lots of dust in the air the next days, maybe the horizon isn't even visible, but if it is i'll take some photos and leave the rest to those more fortunate ... :-)
  2. Thanks @YNM ! I just found out that i mixed up axial and planar precession. Keep the links safe, i am surre we'll need them in the future ;-)
  3. Sorry, i was just trying to be courteous because i expected you to know it. But it has paragraphs on the influence of inclination on precession and on those parts that @YNM mentioned.
  4. Exactly, change the argument with the rate of Saturn's precession. Or, as long as Cassini stayed for a while in a specific orbit, to change the argument with a rate so that it would not dive through the rings before the next orbital change. An inclination of 0 towards Saturn's axis would mean that the orbit is in the rings' ecliptic. No change necessary as long as both apsides are outside, but no nice pictures as well :-) As soon as one apsis is below ring radius inclination must be chosen so that, as long as the probe stayed in a given orbit it would not precess into the rings. Was that right ? Edit: i hope i don't annoy you with this link
  5. Space battleships are easier to discuss ;-) I see it like this but i don't pretend that this is right: I assume that they wanted to keep the probe from diving through the rings during the mission to minimise risk of destruction through collision, so they had to choose orbits that are somehow synchronized with Saturn's rings and moons but nevertheless take the probe to the interesting spots. Since almost every orbit's apsides, in respect to the parent body (in this case that includes the rings), precess (that grammatically ok ?) the probe would have sooner or later ended up diving though the rings if (one of) the apsides had been lower than the rings' radius and the orbit wasn't changed (limited dV-wise). I can't figure out why just 63° are a nice orbital inclination, and they don't tell whether this is toward Saturn's axis or its ecliptic around the sun (Saturn's axis has a tilt of 27° towards its ecliptic) to achieve that goal because i lack the math knowledge. Guesses me, but maybe somebody with the right math background shows up and develops this better.
  6. Hilarious. Even battleships at sea have come out style with the development of all sorts of self guiding stuff. A single cheap rocket could switch it out. A few are still around for display, latest designs from the last centuries 30s and 40s. The idea is less far future but recent, sub-historic past ...
  7. The effects of radioactivity is often underestimated due to bad information. In 1978 a nuclear (reactor core containing enriched uranium) powered satellite crashed over Canada, distributing its debris over more than 100.000 square miles kilometers. Only a very few parts were found, still some had enough radioactivity to kill a person. Imagine what would happen if it crashed into populated areas. I do not know if newer satellites of the likes of these are "better" but i doubt it. Together with the three mile island incident It changed the public perception of nuclear power in northern America in the late 70s. p.s.: don't pick up things that look scorched, lying on the ground in northern Canada ;-)
  8. Material science uses laser and plasma cutting/drilling/ablating/converting/blabla for various purposes. What exactly happens when a high energy laser hits a surface can easily be researched there. To bring this a little bit into a sciency direction ... ;-)
  9. Oh, i didn't know that ... @kunok linked the site at the beginning of the thread ;-)
  10. Too late ... Edit: link corrected
  11. Galaxies are DSO-stuff as well. Besides nebulae, clusters, ... So, there are none ;-) Everything away from our solar system are "deep space objects", i'd say, in contrast to solar, planetary or all kinds of terrestrial/ There may be other notions. It's personal taste and different equipment.
  12. Nice try :-) Inner dynamics of the earth, gravitation, seismics ... Oh, btw., i've flown the polar route once, Dubai/LA. No hole there :-) Edit: as a passenger, of course.
  13. These cuneiforms are actually long deciphered. Mostly official stuff, like storage records, law publications, stuff like that ... Sorry couldn't resist ... :-)
  14. Ah, it was nice, but now you're overdoing it ... :-) Were there no Morlocks ?