BETA
Chapter 1
The illusion of a stationary Earth
Chapter 2
The sun takes center stage
Chapter 3
The math of a year
Chapter 4
Solving the calendar puzzle
YOUR GOAL
Master of How we found our place in space
Ch 3 · The math of a year
futura Earth Orbit Calendar
The Earth spins 'round the Sun, you see, (Oh-oh, not perfectly!) Five hours and forty-eight more, (Yeah-yeah, that's what calendars are for!)
futura Twice a year, the Earth's tilt aligns perfectly with the Sun, producing equal day and night worldwide.
futura Earth's axial tilt of 23.5 degrees causes the changing seasons and the extreme days of the solstices.
Fun Fact
Earth's speeding orbit: Earth travels around the Sun at a blistering speed of about 67,000 miles per hour.
Glossary
leap year (noun)
A calendar year containing an extra day to keep it synchronized with the astronomical or seasonal year. Julius Caesar implemented this quadrennial correction in 45 BC to stabilize the Roman calendar.
A calendar year containing an extra day to keep it synchronized with the astronomical or seasonal year. Julius Caesar implemented this quadrennial correction in 45 BC to stabilize the Roman calendar.