AST101H5 Lecture Notes - Lecture 2: Angular Diameter, Solar Time, Supermoon
Document Summary
Chapter 2 - discovering the sky. Monday, september 14, 2015. Stars in a constellation may not be associated with each other in space - they may just appear to be grouped together as seen from. Stars as a fixed background to detect the movement of objects in the solar system. We see the sky that is above the horizon where we"re standing. distance above the horizon (only measured in angles) How far apart in the sky objects look to us. A full circle is divided into 360 (could have chose any number) 1 degree is a large angle in astronomy, so subdivided the degree into smaller units. 1 minute or arc (1") = 1 degree / 60 (september 15, 2015) Degrees, minutes, seconds, of arc. (september 15, 2015) The angular size that we observe for an object (like the moon) The angle depends on the size and how far it is.