Oh, you got it all mixed up by putting analemma here. The sun can culminate ONLY on the meridian, there can be no wobbling sideways-all culminations will be on the same line. It cannot culminate "here" and "there" with those points being east of west of the meridian. Analemma shows the sun position at the fixed MEAN solar time. Introducing it at the point where you talk about true sun culminations, i.e. AST may confuse a lot of people, especially when you never state what analemma actually is. Also, ET has little to do with Greenwich, it is just a difference between AST and MST.
OK that makes sense So the analemma is where the sun is at the same mean solar time throughout the year and not where it is when the sun culminates. GCSE students don't need to know what the analemma but I'll probably redo the video anyway at some point. Please let me know if you spot any other errors.
So you said that the Equinox was at the point where the analemma crosses itself however that's about 25 days off, the equinoxes occur a bit Lower on the analemma not at the point of crossing but beneath it, otherwise the analemma's point at which it crosses would align with the earth's equator which is not the case.
Fascinating. But why? When astronomers considered this clocks worked by pendulums, which work by gravity. So why is the answer not that gravity varies through the year, and clocks run faster and slower all to the same degree?
as far as I know the value of g at any point on the surface of the Earth is constant. The influence of any variation in the Earth to Sun distance would be negligible.
Thank you very much. your teaching are very simple and easy to understand
thank you so much! i have my gsce coming up and this helped so much
np dude
Oh, you got it all mixed up by putting analemma here. The sun can culminate ONLY on the meridian, there can be no wobbling sideways-all culminations will be on the same line. It cannot culminate "here" and "there" with those points being east of west of the meridian.
Analemma shows the sun position at the fixed MEAN solar time. Introducing it at the point where you talk about true sun culminations, i.e. AST may confuse a lot of people, especially when you never state what analemma actually is.
Also, ET has little to do with Greenwich, it is just a difference between AST and MST.
OK that makes sense
So the analemma is where the sun is at the same mean solar time throughout the year and not where it is when the sun culminates.
GCSE students don't need to know what the analemma but I'll probably redo the video anyway at some point.
Please let me know if you spot any other errors.
So you said that the Equinox was at the point where the analemma crosses itself however that's about 25 days off, the equinoxes occur a bit Lower on the analemma not at the point of crossing but beneath it, otherwise the analemma's point at which it crosses would align with the earth's equator which is not the case.
OK, thanks for that
nice ex-plane
Fascinating. But why? When astronomers considered this clocks worked by pendulums, which work by gravity. So why is the answer not that gravity varies through the year, and clocks run faster and slower all to the same degree?
as far as I know the value of g at any point on the surface of the Earth is constant. The influence of any variation in the Earth to Sun distance would be negligible.