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ChangeLog  view on Meta::CPAN

0.14051   2025-01-11 18:06:06+00:00 Europe/London
====
* moved constants into main module, Astro::Constants
* removed Astro::Constants::CGS from distribution
* removed short names
* changed `:long` tag to `:all`

v0.14	2020 Apr
====
* updated values to the **2018 CODATA** standard
* build script now produces a Raku module for Astro::Constants
* removed references to CGS in documentation
* added script that fetches constant values and uncertainties from NIST
* added warnings to module when using deprecated constants
* added a script to archive the current PhysicalConstants.xml file
* added dimensions to constants in terms of the SI base units
* values that are established by definition are assigned an relative uncertainty of 0
* clarified definition of critical density parameter, rho_c
* updated PhysicalConstants.xml schema definition
  * changed name of **url** element to **source**
  * added _authority_, _year_ and _reference_ attributes to **source**

v0.13	2018 May
====
* adding symbols to PhysicalConstants.xml definition file
* adding deprecation warning to Astro::Constants::CGS - to be removed from package v0.15
* alternateName element in PhysicalConstants.xml can now take a "type" attribute
* alternateName with type=deprecated are now listed with the deprecated tag, not the long tag
* adding RADIUS_JUPITER and MASS_JUPITER to the definition file

ChangeLog  view on Meta::CPAN

v0.10	2016 Feb
=====
A couple of interface-breaking changes:
* 'list_constants' and 'describe_constant' have been removed and
	people are directed to the docs, 'perldoc Astro::Constants'
* 'precision' is broken at the moment and will be fixed in the next version

These changes are enhancements/improvements:
* Short name constants are now *actually* constant and cannot be assigned to
* Values are now stored in an XML file, PhysicalConstants.xml
* Values have been updated using NIST's CODATA 2014 and the IAU 2009/2012
	System of Astronomical Constants
* Long names have an added alternate name to facilitate migrating from
	adjective_noun to noun_adjective.


List of name changes
====================
New names have replaced the old names which are retained in the file using 
the <alternateName> tag

data/fundamental.dat  view on Meta::CPAN

# fundamental.dat
# 	values updated from NIST website
#
# Format: variable<tab>description<tab>CGS value<tab>MKS value
#    or   variable<tab>description<tab>value
#
A_c	LIGHT_SPEED	speed of light in a vacuum	2.99792458e10	2.99792458e8	0
A_k	BOLTZMANN	Boltzmann's constant	1.38064852e-16	1.38064852e-23	5.7e-7
A_G	GRAVITATIONAL	universal gravitational constant	6.67408e-8	6.67408e-11	4.7e-5
A_eV	ELECTRON_VOLT	electron volt	1.6021766208e-12	1.6021766208e-19	6.1e-9
A_h	PLANCK	Planck constant	6.626070040e-27	6.626070040e-34	1.2e-8
A_hbar	HBAR	Planck's constant /2pi	1.054571800e-27	1.054571800e-34	1.2e-8