Week 2
 

There is a new "Mastering Astronomy" assignment 3.  It is due end of day Tuesday Jan. 22.   I'll let you know about first exam (remember these are short) later in the week.  

Complete Lecture Tutorial assignment on "position" page 1".  This will also be due the same day (we only have two days a week, so lots of stuff will be due on Tuesdays---gives you the weekends to work).

If you have not registered for Mastering Astronomy at this point, then you have missed one assignment and may miss another soon.   Remember these count as absences.  Withdrawn on 5th--missing anything.

The enrollment on Mastering Astronomy will be closed by the end of this week  If you are not enrolled, that may automatically cause withdrawal from the course.  

Ch. 2 

Some terms, jargon, concepts to know

North, South celestial poles.  Ecliptic.  Horizon, Meridian, Zenith, Altitude, latitude, longitude.  Angular distance, arc minutes, arc seconds.  Circumpolar.  Prime meridian.  Celestial sphere.  Zodiac.  Sidereal, Solar day/year/month.  Summer/Winter solstice, spring/fall equinox.  Reason for season, moon phases, precession.  Tilt of earth's axis, and moons orbit.  Lunar and Solar eclipse, nodes, umbra, penumbra,  partial eclipse, annular eclipse.  Retrograde motion. Stellar parallax.