Handle Sun's sunrise and sunset azimuth #39
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Knowing when the Sun rises or sets is interesting, but it can also be interesting to know _where_ on the horizon these events are going to happen. The location of the Sun on the horizon's axis is the azimuth. This change adds support of the computing the azimuth angle of the Sun's at sunrise and sunset. `Sun#rising_azimuth` and `Sun#setting_azimuth` can return `nil` as the Sun sometimes never rises or never sets at some places on Earth, like locations close to the poles. ```rb date = Date.new(2015, 2, 5) epoch = Astronoby::Epoch.from_time(date) observer = Astronoby::Observer.new( latitude: Astronoby::Angle.as_degrees(38), longitude: Astronoby::Angle.as_degrees(-78) ) sun = Astronoby::Sun.new(epoch: epoch) sun.setting_azimuth(observer: observer)&.str(:dms) ```
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## 0.2.0 - 2024-03-24 _If you are upgrading: please see [`UPGRADING.md`]._ [`UPGRADING.md`]: https://github.com/rhannequin/astronoby/blob/main/UPGRADING.md ### Features * Angle comparison ([#21]) * Add `#distance` and `#angular_size` to `Astronoby::Sun` ([#30]) * Add geocentric parallax `Astronoby::GeocentricParallax` ([#31]) * Ability to calculate equinoxes and solstices times ([#32]) * Round rising and setting times to the second ([#38]) * Provide sunrise and sunset times ([#35]) * Provide sunrise and sunset azimuths ([#39]) * Ability to calculate the equation of time ([#40]) ### Breaking changes * **breaking:** Accurate setting and rising times for punctual bodies ([#29]) * **breaking:** Drop `Astronoby::Util::Time` in favor of `Astronoby::GreenwichSiderealTime` and `Astonoby::LocalSiderealTime` ([#36]) ### Improvements * Add Dependabot for Bundler and GitHub Actions ([#24]) * Add bundler-audit GitHub Action ([#25]) * Bump actions/checkout from 3 to 4 ([#26]) * Bump standard from 1.29.0 to 1.35.1 ([#27], [#37]) * Bump rspec from 3.12.0 to 3.13.0 ([#28]) [#21]: #21 [#24]: #24 [#25]: #25 [#26]: #26 [#27]: #27 [#28]: #28 [#29]: #29 [#30]: #30 [#31]: #31 [#32]: #32 [#35]: #35 [#36]: #36 [#37]: #37 [#38]: #38 [#39]: #39 [#40]: #40
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Knowing when the Sun rises or sets is interesting, but it can also be
interesting to know where on the horizon these events are going to
happen.
The location of the Sun on the horizon's axis is the azimuth.
This change adds support of the computing the azimuth angle of the Sun's
at sunrise and sunset.
Sun#rising_azimuthandSun#setting_azimuthcan returnnilas theSun sometimes never rises or never sets at some places on Earth, like
locations close to the poles.