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  2. Haleakalā National Park - Wikipedia

    en.wikipedia.org/wiki/Haleakalā_National_Park

    Haleakalā National Park is a national park of the United States located on the island of Maui, Hawaii.Named after Haleakalā, a dormant volcano within its boundaries, the park covers an area of 33,265 acres (52.0 sq mi; 134.6 km 2), [1] of which 24,719 acres (38.6 sq mi; 100.0 km 2) is a wilderness area. [3]

  3. Haleakalā Observatory - Wikipedia

    en.wikipedia.org/wiki/Haleakalā_Observatory

    The Haleakalā Observatory, also known as the Haleakalā High Altitude Observatory Site, is Hawaii's first astronomical research observatory. [1] It is located on the island of Maui and is owned by the Institute for Astronomy of the University of Hawaiʻi, which operates some of the facilities on the site and leases portions to other organizations.

  4. Haleakalā - Wikipedia

    en.wikipedia.org/wiki/Haleakalā

    These high hazard estimates for Haleakalā are based on the frequency of its eruptions. Haleakalā has erupted three times in approximately the last 900 years. By way of comparison, both Mauna Loa and Kilauea have erupted more than a dozen times each in the last 90 years. Hualalai has an eruption rate comparable to Haleakalā. All of Hualalai ...

  5. Sunrise equation - Wikipedia

    en.wikipedia.org/wiki/Sunrise_equation

    The times of the rising and the setting of the upper solar limb as given in astronomical almanacs correct for this by using the more general equation cos ⁡ ω ∘ = sin ⁡ a − sin ⁡ ϕ × sin ⁡ δ cos ⁡ ϕ × cos ⁡ δ {\displaystyle \cos \omega _{\circ }={\dfrac {\sin a-\sin \phi \times \sin \delta }{\cos \phi \times \cos \delta }}}

  6. Kula, Hawaii - Wikipedia

    en.wikipedia.org/wiki/Kula,_Hawaii

    The ancient district of Kula. Kula roughly extends from Haleakala Highway (Hawaii Route 37) in the north to Keokea in the south—a distance of about 16 miles (26 km) around 20°47'32" N, 156°19'37" W. [4] The largely rural area known as Upper Kula includes the region up-slope (southeast) from Lower Kula, the more densely populated area spread along the Kula Highway.

  7. Sunset - Wikipedia

    en.wikipedia.org/wiki/Sunset

    The time of actual sunset is defined in astronomy as two minutes before the upper limb of the Sun disappears below the horizon. [1] Near the horizon, atmospheric refraction causes sunlight rays to be distorted to such an extent that geometrically the solar disk is already about one diameter below the horizon when a sunset is observed.

  8. Native American Heritage Sites (National Park Service)

    en.wikipedia.org/wiki/Native_American_Heritage...

    Haleakala National Park: HI Ancient Hawaii: Hawaii Volcanoes National Park: HI Ancient Hawaii: Homestead National Monument of America: NE Great Plains nations, among others Kaloko-Honokohau National Historical Park: HI Ancient Hawaii: Hopewell Culture National Historical Park: OH Ohio Hopewell Horseshoe Bend National Military Park: AL Muscogee ...

  9. Mauna Kea Observatories - Wikipedia

    en.wikipedia.org/wiki/Mauna_Kea_Observatories

    The location is near ideal because of its dark skies from lack of light pollution, good astronomical seeing, low humidity, high elevation of 4,205 meters (13,796 ft), position above most of the water vapor in the atmosphere, clean air, good weather and low latitude location.