Astronomical measurements; time and the celestial sphere; telescopes and observatories; the solar system, orbital motion; comparative planetology; the sun and solar-terrestrial effects; electromagnetic radiation; spectroscopy, stellar properties and stellar evolution; the Milky Way galaxy; galaxies; the universe. Lectures and laboratories. Intended primarily for astronomy or physics concentrators. Carries natural science divisional credit (with lab) in CAS. Effective Fall 2018, this course fulfills a single unit in the following BU Hub areas: Scientific Inquiry II, Quantitative Reasoning II, Critical Thinking.