Season's Greetings
This is the date of the summer solstice in the northern hemisphere
June 21
a fixed luminous point in the night sky which is a large, remote incandescent body like the sun
Star
The tilt of the Earth causes this.
Seasons
The orbit of a planet is an ellipse with the Sun at one of the two foci.
Kepler's First Law
This is the solstice that happens when you are tilted away from the sun.
Winter Solstice
The luminous surface layer of the sun or a star (what you see)
Photosphere
Earth's ______________ takes 23 hours and 56 minutes.
Rotation
T^2 = a^3
Kepler's 3rd Law
This is the solstice that happens when you are tilted toward the sun.
Summer Solstice
These two elements are in all stars.
Hydrogen & Helium
This is the measurement of the Earth's tilt.
23.5 degrees
A line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time
Kepler's 2nd Law
This is the name of the day when there are 12 hours of sunlight and nighttime.
Equinox
This process uses light to determine what stars are made of.
Spectroscopy
Daily Double: Wager up to 1000 pts.
Starting with fall, name the seasons in order.
Fall, Winter, Spring, Summer
When the Earth is furthest from the sun in it's orbit, we call this distance the ________________.
Aphelion
This is the date of the summer solstice in the Southern hemisphere.
December 22
Earth's ______________ takes 365.25 days.
Revolution
Ellipse
The measure of how circular an object is.
Eccentricity