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Results tagged with observational-astronomy
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user 17202
Questions about the techniques and practice of observing the night sky.
1
vote
What are the Rules of Significant Figures, Precision, and Uncertainty, Strictly Speaking?
A supplement to the (good) answer by uhoh:
Quoted limits of accuracy of astronomical measures have sometimes been called 'formal' limits by their authors. This can be a recognition that even after bes …
- 1,329
5
votes
How exactly is UT1 measured/calculated?
("How exactly is UT1 measured/calculated?" -- with "interest in fine details about how UT1 time is measured.")
(edited 2023/Mch/27 to add references including text+image extract of IAU 2009 explanatio …
- 1,329
5
votes
Measurement of Planetary Aberration (similar to stellar aberration)
I. The statement about planetary aberration quoted in the question, and for which the quesioner seeks some authority, wasn't actually called a 'definition' by the questioner : it's probably best reg …
- 1,329