Questions tagged [standards]
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PYTHON calculation of conversion coefficients for UBVRI filters to standard photometric system
First of all hello, I am new to this forum and I apologize in advance if I am wrong.
I am doing open cluster observations and as a result of these observations I am trying to find the conversion ...
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How can the IAU 2000A vs IAU 2000B nutation comparison be reproduced?
I am attempting to plot how the IAU 2000A nutation model degrades as its terms are omitted. As a spot-check, I decided to compare it to IAU 2000B, which includes only the 77 most important lunisolar ...
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Does mean solar time and sidereal time sometimes indicate the same time?
I'm trying to wrap my head around the different definitions of time. Since mean solar time depends on the Sun, and sidereal time depends on the stars, and since the position of the Sun relative to the ...
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Presenting / printing Right Ascension and Declination values
Are there any standards or established practices on how to write / represent Right Ascension (RA) and Declination (DEC) values in the sexagesimal format?
I have seen all of the following. E.g. for RA:
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Use of type-I a supernovae as standard candle
Why only type -Ia supernovae are used as standard candle to calculate age of universe and why not type II, type Ib, type 1c ?
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How can I tell if my solar glasses are up to ISO standards?
Like many, we bought solar glasses to view the eclipse, and are now in a strange place where we can't tell if they're safe or not. The big fuss seems to be about ISO 12312-2 compliance. Apparently ...
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Is there a timekeeping word for the orbit of a moon?
For a planet, we can colloquially refer to its period of rotation as a "day" and its period of revolution around its parent star as a "year." Some worlds have unique terms, such as Martian days being ...
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Which worlds have unique words for a "day"?
On Mars, we refer to a "day" as a "sol". NASA has developed a whole vocabulary around this term, like "yestersol" and "tosol", etc.
Do any other worlds have unique terms like this? How would one ...
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Abbreviations for days of the week
Is there a set of standard abbreviations for the days of the week for use in astronomy? I couldn't find any reference to it in the The IAU Style Manual (1989).
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Standardized "constellation" regions?
The current system of constellations is historical and has kind of arbitrary boundaries.
This has a number of obvious downsides:
Difficult to define boundaries need complex tables to express
Each ...
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