Figurilla En Forma De Rana

From @dai0.0: “【 #もずくさんのお風呂シリーズ 】 もずくさん🐱の. あかすりサービスはじめました. 湯加減チエックに続いて. あかすりをしてくれるように. なりました(*´▽｀*) 「手をこっちによこすニャ🐱❤️ あかすりするニャ🐱」” #catsofinstagram #twitterweek [source: http://ift.tt/2FpgmM0 ]

Leap Day…Why Does It Exist?

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.

Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com

Sittin at the desk

Sure

follow for non-stop astrology updates

Start the day off right… with a little code! 

Golden tortoise beetle transforming from gold to red

Calculating the surface area of a sphere. Found on Imgur.