Chapter 13 Test Algebra 2 with Trig-Bradshaw

(One second of arc is the angle you get when you divide one degree into 3600 equal parts. For comparison, the Moon’s diameter as seen from Earth is about 0.5 degree, or 1800 arcsec.) A new NASA mission, SIM PlanetQuest, applying the same technique to determine stellar distances, will measure angles to an accuracy of one microsecond (one ... ................
................