AST101H1 Lecture Notes - Lecture 5: Ecliptic, Angular Diameter

• School: UTSG
• Department: Astronomy & Astrophysics
• Course: AST101H1
• Professor: Netterfield

Document Summary

The angular size of an object depends on. Roughly estimating with ones hand: how big it is, how far away it is, 1 degree a finger, 20 degrees open hand, (cid:883)(cid:882) degree"s closed fist. Every month the moon goes around the earth once. We always see the same side of the moon: the moon rotates as it orbits, so the same side always faces the earth, the far side of the moon can never be seen from earth. When aligned right, the moon can cast a shadow on the earth (solar eclipse) or the earth can cast a shadow (lunar eclipse) All the plants are orbiting in the same plane (ecliptic plane) Lunar eclipse: the shadow of the earth blocks the sun, sun, earth, moon, earth casts a shadow on the moon ***, moon gets a lot darker and turns red, occurs at the full moon, somewhere on earth.