1. Constellations pg. 65

2. Constellation section of the sky with a recognizable star pattern. 88 listed 48 from Ptolemy

4. Hemisphere “half” a sphere Earth is divided into a Northern and Southern hemisphere each hemisphere sees a different night sky

6. Horizon line separating earth from sky sun, moon, stars all rise and set on this line (can’t see below it)

7. Polaris “The North Star” Directly above North Pole (the Earth’s axis points to this star, so essentially this is the “star” the earth spins around.) Doesn’t move in night sky

9. Circumpolar Constellations circles near the celestial north pole (Polaris) visible all year

10. Seasonal Constellations visible during specific seasons

11. Zodiac Constellations Divide path of sun over the year by12.

12. Ecliptic: apparent path of the Sun on the celestial sphere

13. Celestial Sphere: imaginary sphere around the earth. The poles of the celestial sphere are aligned with the poles of the Earth. The celestial equator expands outward from Earth's equator.