Popular Post astrotoy Posted February 22, 2020 Popular Post Share Posted February 22, 2020 As probably the only (or one of a very few) astronomers in the group, I found the OP story very interesting. One thing I have learned since starting my studies in astronomy almost sixfty years ago is that it can be very humbling. For example, I would modify the OP story just a bit, setting it in 1860. The astronomer, physicist, and engineer would be explaining why the crystalline sphere is nonsense, and that instead the space between the stars was filled with an invisible aether which was the only way light waves could travel to us. When I completed school we were pretty confident we understood the contents of the universe, studying stars, planets, galaxies, the interstellar medium, the intergalactic medium, and one of the few questions not resolved was how much the universe's expansion was slowing down, and whether the expansion would go on forever, or would stop and come back on itself. Today, we observe that the universe is speeding up its expansion, not slowing down, and all the things that we studied in the universe appear to be about 5% of the actual universe, with major unknown components we call dark matter about a quarter and dark energy the rest. Dark because we cannot detect them except indirectly and because we have no idea what they are. So we have come from having a very complete understanding of almost everything in the universe (what we call the visible universe) to only understanding about 5%, this in a few short years. Larry Jud, motberg, christopher3393 and 3 others 1 4 1 Analog-VPIClas3,3DArm,LyraSkala+MiyajimaZeromono,Herron VTPH2APhono,2AmpexATR-102+MerrillTridentMaster TapePreamp Dig Rip-Pyramix,IzotopeRX3Adv,MykerinosCard,PacificMicrosonicsModel2; Dig Play-Lampi Horizon, mch NADAC, Roon-HQPlayer,Oppo105 Electronics-DoshiPre,CJ MET1mchPre,Cary2A3monoamps; Speakers-AvantgardeDuosLR,3SolosC,LR,RR Other-2x512EngineerMarutaniSymmetrical Power+Cables Music-1.8KR2Rtapes,1.5KCD's,500SACDs,50+TBripped files Link to comment
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