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  2. Earth Hour - Wikipedia

    en.wikipedia.org/wiki/Earth_Hour

    Earth Hour is a worldwide movement organized by the World Wildlife Fund (WWF). The event is held annually, encouraging the individuals, communities, and businesses to give an hour for Earth, and additionally marked by landmarks and businesses switching off non-essential electric lights, for one hour from 8:30 to 9:30 p.m., usually on the last Saturday of March, as a symbol of commitment to the ...

  3. Equatorial coordinate system - Wikipedia

    en.wikipedia.org/wiki/Equatorial_coordinate_system

    Right ascension is usually measured in sidereal hours, minutes and seconds instead of degrees, a result of the method of measuring right ascensions by timing the passage of objects across the meridian as the Earth rotates. There are ⁠ 360° / 24 h ⁠ = 15° in one hour of right ascension, and 24 h of right ascension around the entire ...

  4. Hour angle - Wikipedia

    en.wikipedia.org/wiki/Hour_angle

    In astronomy and celestial navigation, the hour angle is the dihedral angle between the meridian plane (containing Earth's axis and the zenith) and the hour circle (containing Earth's axis and a given point of interest). [1] It may be given in degrees, time, or rotations depending on the application.

  5. Lights go out around the globe to commemorate Earth Hour - AOL

    www.aol.com/article/2016/03/21/lights-go-out...

    Every year for one hour in March, lights are turned off in homes, businesses and world monuments to raise awareness about climate issues facing our planet. Lights go out around the globe to ...

  6. Sydney among first cities to switch off lights for Earth Hour

    www.aol.com/article/2016/03/19/sydney-among...

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  7. Earth's rotation - Wikipedia

    en.wikipedia.org/wiki/Earth's_rotation

    [35] [n 4] Multiplying by (180°/π radians) × (86,400 seconds/day) yields 360.985 6 °/day, indicating that Earth rotates more than 360 degrees relative to the fixed stars in one solar day. Earth's movement along its nearly circular orbit while it is rotating once around its axis requires that Earth rotate slightly more than once relative to ...

  8. Day - Wikipedia

    en.wikipedia.org/wiki/Day

    In terms of Earth's rotation, the average day length is about 360.9856°. A day lasts for more than 360° of rotation because of the Earth's revolution around the Sun. With a full year being slightly more than 360 days, the Earth's daily orbit around the Sun is slightly less than 1°, so the day is slightly less than 361° of rotation.

  9. These are the top 100 Black Friday deals, according to Walmart

    www.aol.com/lifestyle/these-are-the-top-100...

    Walmart is keeping track of its 100 most popular deals for Black Friday weekend, including TVs, AirPods, HP laptops, and more.