The fate of the Earth?
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From: G=EMC^2 Glazier on 17 Sep 2009 09:15 Sam have no trouble using fix stars as to relate. Never argue with Ody. was just saying earth's rotation is measured right down to a second. We human's dokeep good time,right down to a second over 2 million years Bert
From: Peter Webb on 17 Sep 2009 09:35 dow gave you a very reasonable and clear explanation of the forces involved. You spewed abuse, and pretended to know something about physics. Presumably next time he will know not to bother trying to explain it to you, as you are wilfully ignorant.
From: tj Frazir on 17 Sep 2009 09:32 My sigless gps is in motion with the earth when its let go to watch not turning with the earth. thats like UP at a fixed point in space.
From: dow on 17 Sep 2009 10:48 On Sep 17, 9:35 am, "Peter Webb" <webbfam...(a)DIESPAMDIEoptusnet.com.au> wrote: > dow gave you a very reasonable and clear explanation of the forces involved. > You spewed abuse, and pretended to know something about physics. > > Presumably next time he will know not to bother trying to explain it to you, > as you are wilfully ignorant. Yes, Peter. You are right about that. I don't think I will bother looking at this conversation any more. dow
From: oriel36 on 17 Sep 2009 13:24
On Sep 16, 10:55 pm, Sam Wormley <sworml...(a)mchsi.com> wrote: > oriel36 wrote: > > > Checking the accuracy of a watch using the Ra/Dec system where a star > > returns 3 minutes 56 seconds earlier to the same meridian each night > > is just a wonderful timekeeping average based on the calendar system > > and can be enjoyed when appreciated in that light but only the dumbest > > would launch into a conclusion that it represents a basis for > > planetary dynamics in spite of thousands of years of astronomy > > dictating that the reference for theannual motion of the Earth is the > > return of a star to a meridian while the Sun provides the reference > > for the daily motion of the Earth. > > > The same guys who can't tell you what distance does the Earth's > > Equator cover through 360 degrees of rotation are the same ones > > promoting 'time travel' , the 'big bang' and now with those stupid > > concepts played out are moving into the climate arena. > > Why should I care? What's important is that the earth rotates > exactly 360° in one sidereal day, and that it rotates about one > additional degree (~361° total) in one solar day... and there are > no contradictions. The only guy that's got a problem, is you, > Gerald!- Hide quoted text - > I would have imagined that at least one person could comprehend the basic principle of unequal natural noon,the correction which reduces it to a 24 hour cycle and keeps those cycles ticking over constantly and then the neatest trick of converting the 'average' 24 hour part into constant rotation,it is not difficult and really enjoyable for all levels of understanding who actually wish to know how the 24 hour day works with planetary geometry/geography and rotational characteristics. The formal proof for constant daily rotation through 360 degrees using an Equatorial speed of 1669.8 km per hour and a speed of 837 km per hour at 60 degrees latitude is surprisingly simple and far superior to Foucault's pendulum which is only proportional compared to direct observations and experiences.The explanation for why twilight lengths vary with latitude rely on how fast the Earth is turning at a given latitude in 24 hours so that at any given moment,a location is transiting through the circle of illumination at appropriate latitudinal speeds causing daylight to turn into darkness rapidly at the Equator and longer twilights towards the poles. I won't even ask you what speeds you assign for rotation through 15 degrees/1 hour seeing that you have this abysmal attachment to the 'sidereal time' value.I really would like to know what people think they are doing by ignoring the most basic facts which tie the Earth's geometry/geography to daily rotation through 360 degrees in 24 hours exactly ? > - Show quoted text - |