Once every four years, an extra calendar day is added: a leap day. But why?
The reason for adding leap days to the calendar is to align the calendar year with the actual year – which is defined by the time it takes Earth to circle the sun. It is equal to 365 days, 5 hours, 48 minutes and 46 seconds, or 365.24219 days.
If all calendar years contained exactly 365 days, they would drift from the actual year by about 1 day every 4 years. Eventually, July would occur during the northern hemisphere winter! Wouldn’t that be weird?
To correct (approximately), we add 1 day every 4 years…resulting in a leap year.
By making most years 365 days but every fourth year 366 days, the calendar year and the actual year remain more nearly in step.
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1975 NASA concept art by Don Davis takes us to a future space colony in the form of a “Stanford torus” that can house tens of thousands of humans. It was first proposed in a 1975 NASA study at Stanford University where experts gathered to speculate on designs for future space habitats. Using centrifugal force, a doughnut-shaped torus structure that is 1.8 km in diameter could rotate once per minute to provide between 0.9g and 1.0g of artificial gravity on the inside of the outer ring. A system of mirrors would direct sunlight to the interior to make it the well-lit paradise you see here. (NASA)
me: only deep and meaningful lyrics get to me
rammstein: you’ve got a pussy, i have a dick-ah, so what’s the problem, let’s do it quick
me:
In his defense, he didn’t know if it was the real life or just fantasy...
The stats on the world of an awesome movie adapted from an even more awesome book.
The Martian: Ares 3 Mission Guide
火星の人
Ohne dich kann ich nicht sein, Ohne dich, Mit dir bin ich auch allein, Ohne dich, Ohne dich zähl ich die Stunden, Ohne dich, Mit dir stehen die Sekunden, Lohnen nicht
Rammstein, Ohne Dich (2004, Reise, Reise)
Stormy seas in Sagittarius
Me af
“so how are you going with your studies”
“have you found a job yet”
“got a special someone in your life? ;)”
21, He/Him/His, lover of all things space, aviation, alt music, film, and anime
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