Earth
This causes the Earth's seasons.
What is the obliquity (tilt)of the Earth?
The Sun is located in the ______________ galaxy.
What is the "Milky Way"?
It takes this long for the moon to revolve completely around the Earth.
What is 29 days or about a month?
This is measured in degrees from the observer's horizon to the object.
What is "altitude"?
Like all solar satellites, Earth revolves around the Sun in a two dimensional plane called an ____________.
What is "ecliptic"?
The average distance between the Sun and the Earth is about 1.496×108 km (~93 million mi) or 1 __________________________.
What is "astronomical unit"?
This imaginary line goes from the North Pole to the South Pole of the Earth.
What is the "axis"?
The solar year (the time from equinox to equinox) is 20 minutes shorter than the _______________ year (the time it takes Earth to complete exactly one revolution around the Sun).
What is sidereal?
When an object is at its closest point to the Sun in the ellipse, the periapsis is called the ______________.
What is the "perihelion"?
During this phase of the moon, we can see no light from the moon.
What is a "new moon"?
These are the center points of an ellipse.
What are "foci"?
This term is used to describe the phase of the moon when the Earth is between the Sun and the moon.
What is "full moon"?
This occurs when the moon moves between the Sun and the Earth, blocking some the the sun's light.
What is a "solar eclipse"?
The sun appears lower in the sky during this time of year because of the obliquity (tilt) of the earth.
What is "autumn" or "fall"?
The longest day of the year in Northern Hemisphere .
What is "summer solstice"?
Out timekeeping is based on the time period from one sunrise or sunset to the next, also called the ________ day.
What is the "solar"?
This is how the Sun's rays strike the Northern Hemisphere in the summer.
What is "directly"?
When the Sun, moon and Earth are in alignment (full moon or new moon phase), the enhanced lunar tides are called _______________ tides .
What is "spring"?
The diversion of flowing air and water from a N-S direction to an E-W direction.
What is "Coriolis effect"?
Occurs halfway between the soltices when the Sun is directly over the equator.
What is the "equinox"?