chapter 1 discovering the night sky. the celestial sphere
TRANSCRIPT
Chapter 1
Discovering the Night Sky
The Celestial Sphere
Measuring Space
Measuring Space
Looking at Stars Near the North Pole
Universal Time is Measured at Greenwich, England
Time Zones
The Ecliptic
The Ecliptic Plane
Seasonality: What Causes the Seasons?(the tilt of the Earth’s axis)
The Height of the Sun Throughout the Year Changes
The Energy Deposited by the Sun Changes Throughout the Year
Summer Winter
The Changing Path of the Sun
Precession: The Earth’s Wandering Pole
The Changing North Star (Polaris isn’t always it…)
Phases of the Moon
Conditions for Eclipses
Lunar Eclipse
3 Types of Lunar Eclipses
Solar Eclipse
The End