PHYS 2600 Chapter Notes - Chapter 4: Galilean Moons, The Moons, Geocentric Model
25 Sep 2017
School
Department
Course
Professor
Document Summary
4-5 galileo"s discoveries with a telescope strongly supported a heliocentric model telescope changed astronomy forever. Galileo galilei used it to discover that the planets orbit the sun, not earth: also discovered mountains on the moon, sunspots on the sun, and the rings of saturn. The phases of venus: first to see that the milky way was (cid:498)a mass of innumerable stars(cid:499) related to the planet"s phase. (e also noted a correlation between the phases of venus and the planet"s. Galileo also discovered that venus exhibits phases like those of the moon. Noticed that the apparent size of venus as seen through his telescope was: small at gibbous phase, largest at crescent phase. Figure 4-14 shows a heliocentric model of earth and venus orbiting the sun. Venus can sometimes be seen from earth even though they are both orbiting the sun because they do not orbit the sun in the exact same phase.
