1. Eclipses & Tides

2. Eclipse
When an object in space comes between the sun and a third object.
When the moon’s shadow hits the Earth or Earth’s shadow hits the moon.
The moon’s orbit around the Earth is slightly tilted with respect to Earth’s orbit around the sun, so most months, this does not occur.
There are two types: solar & lunar

3. Occurs when the moon passes directly between the sun and the Earth.
The moon’s shadow hits the Earth.
Occurs during a new moon, and the new moon blocks our view of the sun
Can be seen during the day.
Solar Eclipse
They happen once every 18 months approximately, but don’t always occur in accessible locations.
Total solar eclipses are theorized to average 7:30 minutes, total lunar eclipse can last up to 100 minutes.
Takes about 375 years to see a total solar eclipse again at a specific location.

4. Umbra
Penumbra
The very darkest part of the moon’s shadow (cone shaped).
Only people within the umbra experience a total solar eclipse and the day turns into what appears to be night.
It gets dark and cold.
You can see the solar corona which is the outer atmosphere of the sun.
Larger part of the shadow of the moon.
Part of the sun is visible by the Earth so you can’t look directly at the sun.
The moon’s shadow is segmented into pieces based on how dark the shadow is in different areas.
People in the penumbra only see a partial solar eclipse.

5. Lunar Eclipse When the Earth is directly between the moon and the sun.
The Earth blocks the sunlight from reaching the moon.
The moon is in the Earth’s shadow and looks dim from Earth.
This occurs during a full moon & can be seen at night.
Lunar Eclipse
During most months, the moon moves near the Earth’s shadow, but not quite into it.

6. Total Lunar Eclipse Partial Lunar Eclipse
The Earth, moon and sun are not quite in line
The moon passes partly into the umbra of Earth’s shadow
When the moon is in the Earth’s umbra
You can see the edge of the Earth’s shadow on the moon
This can be seen anywhere on Earth that the moon is visible
The moon appears with a reddish tint because the Earth’s atmosphere bends some sunlight toward the moon.
Total lunar eclipse you are more likely to see than a total solar eclipse.

7. Tides
Tides are caused by the gravitational pull of the moon and the sun on the Earth.

8. This type of tide results when the sun, Earth, and moon are in a line
During full and new moon
It doesn’t matter which order they go in, the result is the same  the greatest difference between consecutive low and high tides.
Occurs twice a month
Spring Tide
The gravity of the sun and the moon pull in the same direction, and this combination produces a high high tide and a low low tide.

9. The line between the Earth and the sun is at a right angle to the line between the Earth and moon, so the sun’s pull is at a right angle to the moon’s pulling.
During 1st and 3rd quarter moon
The result is a tide with the least difference between consecutive low and high tides.
Neap Tide
Earth, sun and moon are not aligned, the moon is at a 90 degree angle.
A high low tide and a low high tide