Mars' View Of Earth. Amazing!

Hubble Discovers a Fifth Moon Orbiting Pluto / Source / by NASA Goddard Photo and Video

oh hey link what’s up little guy

you don’t look so hot. you have a headache?

well let’s take a look see

holy shit

holy SHIT

it’s a boy. omg i’m a grandma

i’m so proud

Adorable motor protein just traveling along. Converting chemical energy into mechanical energy. Keep on rockin motor protein!

Uranus seen from Saturn

when ur mom comes home with the groceries

Saturn and its largest moon reflect their true colors

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We exist for a mere blink of an eye in astronomical terms.

Happy leap day!!!

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.

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