What is Astronomy?

The science that studies ________________________________________________

Kepler’s Laws

Purpose: Explain the motion of the Earth and how that affects the_________________________________in the past and present

Big Bang Theory:

Kepler’s

Three Laws

Description

First

The _________________of the planets are ellipses, with the ___________________________________ of the ellipse.

Second

A planet moves _____________________ when it is________________

_________________ and ______________ when it is ___________________________________.

Third

relationship between the _____________________ of planets from the Sun, and their ___________ periods.

First Law

Second Law

Third Law

Electromagnetic Radiation: Different waves of __________________________based on wavelengths and frequency

Solar Radiation:

Photosynthesis:

FUSION:

FISSION:

Fusion and Fission

Earth’s Motion

Precession

Tilt on a_____________________ in an elliptical motion

The North Star is not always the ______________________________ of rotation --- MOON

Nutation

Oscillatory (movement of the axis ___________________________________) of a rotating body

Observed during _______________________

Occurs about 18.6 years

Rotation:

1. The turning or spinning of a body on its axis (23.5 degree tilt)

2. Causes ________________ and _____________________

3. Whole process takes _____________________

1. Tidal Currents:

a. Currents generated by tides

b. Gravitational pull of the _______________________

c. ____________________________ at high and low tides

2. Tides:

a. change in elevation (which means?)

b. Based on gravitational forces of the sun and the moon

3. Spring Tides

a. Occur during the ________________________ moons

b. All gravitational forces are __________________together

c. Extreme high and low tides

d. High tidal range

4. Neap Tides

a. During the 1st and 3rd quarters of the Moon

b. Gravitational forces are offset ( or __________________________)

c. Tidal range is the ___________________ value

Barycenter

The center of mass where two or more ________________________________ orbit each other and balance each other out.

Revolution

1. Motion of a body along a path around some point in space.

2. Earth’s orbit is _________________________

3. Earth’s distance from the sun varies

What causes seasons?

1. Seasons are caused by the ____________________________________ on its axis

2. Focusing on the Northern Hemisphere:

a. When the hemisphere is tilted ________________ the sun that determines a ________________________ season

b. When the hemisphere is tilted ____________________ the sun that determines a ____________________ season

**Equator: this imaginary line denotes the warmest weather because it is directly hit by the sun due to the tilt**