Astonomy

Constellation

A set of stars that creates a recognizable pattern

Precession

A slow movement of the axis of a spinning object

Ecliptic

Apparent path of the sun through the celestial sphere

Asterism

a portion of a constellation

Atomic Spectrum

Unique set of colors given off by an excited atom

Wavelength

distance between two waves

Provide three pieces of evidence that the earth is round

- We have pictures
- The other planets are round
- the shadow of the earth is round during a "lunar eclipse"
- Foucault's pendulum
- Ships sink below horizon
- Can only see certain stars at any point

Provide three pieces of evidence that the geocentric model is incorrect

- Jupiter's Moons
- Retrograde motion
- Parallel of stars

RAA 22H 57m to 3H 41M / Dec 77.7 to 48.6

Cassiopeia

RAA 3H 23m to 5H 53M / Dec 31.1 to -1.35

Taurus

Why do we have seasons here on earth

The earth is tilted (Toward the sun in the summer, and away in the winter) (We are farther from the sun in the summer)

Mean Solar Day

The time between successive crossings of the upper Meridian by the sun

Sidereal Day

Time it takes for the vernal equinox to move all the way around the earth (about 23 hours and 56 minutes)