by Lizette

What is Astronomy?

2014-05-07 17:18:18 UTC

Astronomy is the study of the moon, stars, and other objects in space.

Calendars in History

2014-05-07 17:20:22 UTC

-One of the first civilizations that created calendars were the ancient Egyptians. Their calendar wasn't exactly very accurate, but it worked at an extent.

-The ancient Egyptians counted the days between the years, which was 365 days. Later in history the Romans fixed this to make it more accurate by adding one day in March every four years to correctly correspond with the seasons. This addition of a day is called Leap Year. The Earth, in fact, orbits the sun in about 365 and 1/4 days.

-Over many years the Roman calendar gained changes as well. Pope Gregory XIII took off ten days of Spring because Spring came ten days too early on the calendar.

Earth moves in two different ways

2014-05-07 17:24:38 UTC

Rotation and Revolution

Rotation

2014-05-07 17:25:05 UTC

-The imaginary line that passes through Earth's center and the North and South poles is Earth's axis. Earth's rotation causes day and night.

Solar Calendar

2014-05-07 17:33:31 UTC

How seasons change

lizette_med — 2014-05-07 17:36:16 UTC

*Earth has seasons because its axis is tilted as it revolves around the sun.

*Time changes occur during Autumn and spring equinox's'.

Ancient Egyptian Calendar

2014-05-07 17:39:14 UTC

Revolution

2014-05-07 17:40:54 UTC

The movement of one object around

another. Earth follows a path which

revolves around the sun, called orbit.

lizette_med — 2014-05-07 17:41:12 UTC

Roman Calander

2014-05-07 17:42:24 UTC

lizette_med — 2014-05-08 17:45:35 UTC

Earth's movement and seasons

2014-05-08 17:52:18 UTC