Path: csiph.com!eternal-september.org!feeder.eternal-september.org!mx02.eternal-september.org!.POSTED!not-for-mail From: jimp@specsol.spam.sux.com Newsgroups: sci.physics Subject: Re: Since the Earth is spinning and orbiting and whatnot, are we experiencing time wrong because of time dilation? Date: Tue, 12 Jan 2016 18:32:23 -0000 Organization: A noiseless patient Spider Lines: 43 Sender: Jim Pennino Message-ID: References: Injection-Info: mx02.eternal-september.org; posting-host="db4120ef82bbc153014637d4cd15a795"; logging-data="7678"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+uL1ijIiS7MqVsXGnzbX/j" User-Agent: tin/2.2.1-20140504 ("Tober an Righ") (UNIX) (SunOS/5.10 (i86pc)) Cancel-Lock: sha1:pjdBXaEpttWhKKEc1r/fVjlRZz4= Xref: csiph.com sci.physics:544824 Sam Wormley wrote: > Since the Earth is spinning and orbiting and whatnot, are we > experiencing time wrong because of time dilation? >> http://www.askamathematician.com/2015/02/q-since-the-earth-is-spinning-and-orbiting-and-whatnot-are-we-experiencing-time-wrong-because-of-time-dilation/ >> Physicist: A little! >> >> The movement of Earth, as well as the Earth?s gravity, change how >> much time we experience compared to other objects in the universe. >> If we were to occasionally compare our clocks to clocks in tight >> orbits around black holes or neutron stars we?d find they run slower >> than ours, and if we compare with clocks floating deep in the middle >> of nowhere we?d find that we?d find that those clocks run a little >> faster than ours. >> >> However, there?s no ?true? time to experience; you can never >> experience time wrong. Time is relative which means that we can >> compare how time is passing for any two things, but there?s no >> ultimate ?clock of the universe? to compare with. Your watch, no >> matter where you are or how you?re moving, will always read 1 second >> per second. That is, you?ll never see yourself in fast-forward or >> slow-motion. In that sense we can?t help but experience time >> correctly. Each of us may as well declare that our clock is the One >> True Clock, and everyone else?s is wrong. > > > >> To escape the Earth from the ground you need 11 km/s. More difficult >> is escaping the Sun (from Earth?s orbit) which requires 42 km/s. To >> leave our galaxy (from here) you need somewhere between 500 and 600 >> km/s. This time dilation from the Milky Way?s gravity has the >> biggest effect of those mentioned here. >> >> The spinning of the Earth and the orbiting of the Sun do affect the >> amount of time you experience, but not by a lot. Despite being >> closer to the Earth than the bulk of the galaxy, it?s our orbits >> around, and position in, our galaxy that affects our experience of >> time the most. What a puerile title. -- Jim Pennino