Earth, Moon, and Sun Interactions

12.1

The Moon

-Formed by debris from Earth when it was hit by Mars sized planet

-Lunar highlands

-Crater filled

-Mare

-Fewer craters

-Was thought to be ocean in the past

-Basalt

-Phases of the moon

-Waxing

-Waning

-Causes tides because of gravitational pull

-We only see one side

-It rotates around the Earth in 29.5 days

Earth

-Has a 23.5 degree tilt

-When a hemisphere is tilted towards the Sun, it is summer because is receives more direct rays

-When a hemisphere is tilted away from the Sun, it is winter because it receives less direct rays

-It revolves around the Sun in 365 days

Eclipses

Solar Eclipse

-Occurs when the Sun, Moon, and Earth are in a straight line

-The Moon blocks the Sun's light, and the small shadow falls onto Earth

-Occurs infrequently because the Moon does not revolve around the Earth on the same plane as the Earth orbits the sun


Lunar Eclipse

-Occurs when the Sun, Earth and Moon are in a straight line

-The Earth blocks the Sun's light, and a shadow falls on the Moon

Constellations

-Constellations are patterns of the stars in the sky

-The same stars can be interpreted as many different things

-Influenced culture and different views

-Depending on the time of year we can see Mars, Venus, Jupiter, and Saturn

-The International Astronomical Union lists 88 official constellations