The basics of angular measurement a b c
Celestial Equator, North and South Celestial Poles
right ascension, declination, vernal equinox
zenith, meridian, north point, altitude, azimuth
Official borders on the celestial sphere
Star names
Stars rise and set depends on your latitude
If you are: at the north pole the equator in between N S
What part of the sky do you see?
Sun
wrt horizon daily yearly
depends on where you are pole summer pole winter
depends on where you are: N pole equator +23 ½ degrees in between
solar angle, amount of light, NOT distance [for the Earth] scale
Motion of the earth’s axis about 26,000 years movie
solar vs. sidereal the geometry
Phases What does phase depend upon? an
Motion
revolution sidereal = 27.3days synodic= 29.5
rotation synchronous the dark side of the moon
Solar - total, annular, partial movie sequence
Lunar - total, partial, penumbral sequence
Apparent retrograde motion Mars
