Template:Did you know nominations/Night

Night

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... that one night on the planet Venus lasts just over 58 full days on Earth?

Source: "Venus, Backwards Rotation and Orbital Period". Royal Belgian Institute for Space Aeronomy. n.d. Retrieved 22 April 2025. This means a little more than 2 complete solar days in one sidereal day! Venusian days and nights last almost 2 terrestrial months (58d 9h).

ALT1: ... that the longest night at the North Pole lasts 179 days from September to March? Source: Mulvaney, Kieran (20 April 2024). "What is polar night?". National Geographic. Retrieved 20 April 2024. The closer to the poles, the longer polar night lasts: at the North Pole, for example, the Sun sets a few days after the autumnal equinox in mid-September and does not rise again until mid-March, giving the top of the world a polar night of 179 days.[1]
ALT2: ... that during during a night on the moon, the planet Earth appears 50 times brighter than a full moon appears from Earth? Source: Plait, Phil (July 21, 2023). "Earthshine Lights up the 'Dark Side' of the Moon". Scientific American. But Earth is four times the diameter of the moon and, therefore, more than 15 times its area in the sky, so it appears much brighter. Not only that, on average Earth is also about two to three times more reflective than the moon, so overall it can be as much as 50 times brighter in the moon's sky than the full moon is in ours. From the moon's point of view, Earth is bright.
ALT3: ... that during a night on the planet Mercury, the temperature can drop by over 1,000 °F (538 °C)? Source: Bolles, Dana, ed. (2024a). "Mercury: Facts". NASA Science. Retrieved 14 February 2024. Because the planet is so close to the Sun, day temperatures can reach highs of 800°F (430°C). Without an atmosphere to retain that heat at night, temperatures can dip as low as -290°F (-180°C).
ALT4: ... that in the absence of artificial lighting, people typically wake during the night and sleep in two phases? Source: Ekirch, A. Roger (April 2001). "Sleep We Have Lost: Preindustrial Slumber in the British Isles". American Historical Review: 357. doi:10.1086/ahr/106.2.343. Until the close of the early modern era, Western Europeans on most evenings experienced two major intervals of sleep bridged by up to an hour or more of quiet wakefulness [...] The Tiv even employ the terms "first sleep" and "second sleep" as traditional intervals of time. [...] In attempting to recreate conditions of "prehistoric" sleep, Dr. Thomas Wehr and his colleagues at NIMH found that human subjects, deprived at night of artificial light over a span of several weeks, eventually exhibited a pattern of broken slumber—astonishingly, one practically identical to that of pre-industrial households [...]
ALT5: ... that during the night, cacti and many night-blooming plants store up to 99% of the carbon dioxide they use in daily photosynthesis? Source: "In obligate Crassulacean acid metabolism (CAM), up to 99 % of CO2 assimilation occurs during the night, therefore supporting the hypothesis that CAM is adaptive because it allows CO2 fixation during the part of the day with lower evaporative demand, making life in water-limited environments possible ... In perennial obligate CAM plants, such as cacti, up to 99 % of CO2 assimilation occurs during the night ..." & In Agave deserti (Asparagaceae), a nocturnally pollinated CAM plant,"
ALT6: ... that many night scenes in silent films were filmed during the day on monochromatic film and soaked in acidic dye that tinted the scene blue? Source: Edwards, Nina (2018). Darkness: A Cultural History. Reaktion Books. p. 180. ISBN 978-1-78023-982-8. During the era of silent film, the difficulty of producing night scenes meant that films were often shot in daylight and then tinted blue to create the impression of the dark., "Tinting silent films could either be literal (blue for night, gold for candlelight, red for flames, etc.)", & "Tinting, as carried out by film laboratories, is a simple process. Dissolve an acid dye in some water with a small addition of acetic or citric acid to acidify the solution and soak a print in the solution. Remove after a few minutes, wash the surface dye solution off the film, and dry it."
Reviewed: Template:Did you know nominations/Whoops (song)

Improved to Good Article status by Rjjiii (talk). Number of QPQs required: 1. Nominator has 11 past nominations.

Rjjⁱⁱⁱ (talk) 06:02, 22 April 2025 (UTC).

General eligibility:
New enough:
Long enough:
Other problems:

Policy compliance:

Adequate sourcing:
Neutral:
Free of copyright violations, plagiarism, and close paraphrasing:
Other problems:

Hook eligibility:

Cited:
Interesting:
Other problems:

QPQ: Done.

Overall: New (promoted to GA on April 20), long enough, well sourced and neutral, free from plagiarism. Hook is cited and interesting.

Though one question, your QPQ is way back in July 2024, did you have a backlog of reviews? Pinging @Rjjiii: for answers Warm Regards, Miminity (Talk?) (me contribs) 14:59, 25 April 2025 (UTC)

@Miminity: I thought that "QPQs do not expire and may be used at any time for a future DYK nomination. (WP:QPQ)", but if the age is a concern, I can do another one. Rjjⁱⁱⁱ (talk) 17:31, 26 April 2025 (UTC)

Okay. Thank You Good To Go! Warm Regards, Miminity (Talk?) (me contribs) 22:18, 26 April 2025 (UTC)