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5 votes

Can we determine for sure if the Sun revolves around the Earth?

I don't think you need to understand much math to judge whether a heliocentric or geocentric model of our solar system is better. I think all that is needed is to ask some simple questions about which ...
  • 1,495
6 votes

Can we determine for sure if the Sun revolves around the Earth?

Is Rabbi Schneerson indeed correct: that we have no absolute way to determine whether the Earth revolves around the sun or the other way around and that his belief is no less valid than the one ...
  • 489
28 votes

Can we determine for sure if the Sun revolves around the Earth?

TLDR: the Rabbi is correct in a very specific technical sense, but it is not helpful to think about the question in the way he advocates. Detailed answer: The Rabbi's claim raises an interesting ...
  • 2,725
72 votes

Can we determine for sure if the Sun revolves around the Earth?

The referenced link is correct; all frames of reference are equally valid in general relativity -- with a catch or two. One catch is that the mathematics can get a bit ugly (or more than a bit ugly), ...
0 votes

Does the Eco-Cooler reduce temperatures in tin huts by around 5° Celsius, compared to simple windows?

I found a paper studying the effectiveness of this sort of air cooler. Link Table 2 (Page 7) of the paper states that the reduction achieved was less than 1C over an hour, which contradicts the claim ...
  • 179
9 votes

Was an invisible electrostatic wall generated at a plastic tape factory in August 1980?

A primary source for this is Wide Polypropylene Web Static Charge - A Phenomenon Worthy of “Star Trek” ANTEC '97 Conference Proceedings, CRC Press, pages 1310-1313. A web of polypropylene plastic, 21 ...
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