Solar zenith angle minutes of arc, which is less than the apparent angular radius of the sun. The formula also neglects the effect of atmospheric refraction. Sunset and sunrise occur (approximately) when the zenith angle is 90°, where the hour angle "h" satisfies Precise times of sunset and sunrise occur when the upper limb of the Sun appears, as refracted by the atmosphere, to be on the horizon. A weighted daily average zenith angle, used in computing the local albedo of the Earth, is given by where "Q" is the instantaneous insolation. For example, the solar elevation angle is : An exact calculation
Less Than (song) from the mature, more dignified Nine Inch Nails in 2017." Multiple journalists singled out the song as the best or standout track from the "Add Violence" EP. Less Than (song) "Less Than" is a song by American industrial rock band Nine Inch Nails, from their EP "Add Violence". It was released on July 13, 2017 and the music video alludes to the video game "Polybius", an urban legend about a video game used to data mine information from people to the government. On October 2017, it peaked at number 10 on the "Billboard" US Mainstream Rock Songs chart. "Less Than"