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astro

0.5.0
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Astronomical calculations in Elixir including sunrise, sunset, moonrise, moonset, equinox, solstice, moonphase and more.

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CHANGELOG.md 

# Changelog



## Astro version 0.5.0



This is the changelog for Astro version 0.5.0 released on August 26th, 2021.  For older changelogs please consult the release tag on [GitHub](https://github.com/kipcole9/astro/tags)



**Please note that Elixir 1.11 or later is required.**



### Bug Fixes



* Updates documentation to be clear about installation and setup requirements for `tz_world`



* Fixes test data for São Paulo now that it no longer uses DST



* Ensure `:astro` is started in test mode



### Enhancements



This primary focus of this release is to add lunar calculations for moon phase.



* Adds `Astro.date_time_new_moon_before/1`



* Adds `Astro.date_time_new_moon_at_or_after/1`



* Adds `Astro.lunar_phase_at/1`



* Adds `Astro.date_time_lunar_phase_at_or_before/2`



* Adds `Astro.date_time_lunar_phase_at_or_after/2`



## Astro version 0.4.0



This is the changelog for Astro version 0.4.0 released on February 16th, 2020.  For older changelogs please consult the release tag on [GitHub](https://github.com/kipcole9/astro/tags)



### Breaking Change



* When no timezone is found the return is changed from `{:error, :timezone_not_found}` to `{:error, :time_zone_not_found}` to be consistent with Elixir and `TzData`.



## Astro version 0.3.0



This is the changelog for Astro version 0.3.0 released on December 9th, 2019.  For older changelogs please consult the release tag on [GitHub](https://github.com/kipcole9/astro/tags)



### Change in behaviour



* Seconds are no longer truncated to zero when calculating datetimes and durations



### Enhancements



* Add `Astro.solar_noon/2` to return the true solar noon for a location and date



* Add `Astro.hours_of_daylight/2` to return hours, minutes and seconds as a `Time.t()` representing the number of daylight hours for a give location and date



* Add `Astro.sun_apparent_longitude/1` to return the apparent solar longitude on a given date. The result, a number of degrees between 0 and 360, can be used to determine the seasons.



## Astro version 0.2.0



This is the changelog for Astro version 0.2.0 released on December 6th, 2019.  For older changelogs please consult the release tag on [GitHub](https://github.com/kipcole9/astro/tags)



### Enhancements



* Add `Astro.equinox/2`and `Astro.solstice/2` to calculate solstices and equinoxes for a year. From these can be derived the seasons.



* Add `Astro.Time.datetime_from_julian_days/1`



* Add `Astro.Time.utc_datetime_from_terrestrial_datetime/1`



## Astro version 0.1.0



This is the changelog for Astro version 0.1.0 released on December 5th, 2019.  For older changelogs please consult the release tag on [GitHub](https://github.com/kipcole9/astro/tags)



### Enhancements



* Initial release includes `Astro.sunrise/3` and `Astro.sunset/3`.  See the readme for further roadmap details.