ASTR 1P01 Lecture : Astronomy 1P01 notes.docx

• School: Brock University
• Department: Astronomy
• Course: ASTR 1P01
• Professor: Bozidar Mitrovic

Document Summary

Astronomy is not the same thing as astrology. Astronomy is science and astrology is a form of divination. A short survey of the universe and the distant scales (scientific notation, i. e. powers of 10) Approximately a sphere, with a radius, which is about 6,400 km. The greeks knew (in particular aristotle 384 bc-322bc) that the earth must be a sphere. They deduced from observations: travelling south, one can see new stars and constellations (groups of stars): The earth spins (rotates) from west to east (as one would see from above the north pole) once every 24 hours. This so-called daily motion is responsible for the cycle of day and night. Also, it is responsible for the fact that an observer on earth sees the sun, the moon and the star move from east to west. Earth) would see the sunset line (he moves together with the. Also, the earth revolves around the sun once every 365 - 365. 25 days.