{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

AST-L5-ch4__3

AST-L5-ch4__3 - Planets Stars and Galaxies Prof David Lind...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 AST 1002 Planets, Stars and Galaxies Section 1 -- MW 3:35-4:50 pm; Section 2 -- MW 5:15-6:30 pm Today’s Lecture: purpose & goals Motions in the Sky 2: Motions of the Celestial Sphere” Review : Lunar Phases, Eclipses, Seasons Understand the Rotation of the Celestial Sphere -- leads to the day/night cycle -- define what part of sky we can see Understand Constellations and Star names from the Sun -- leads to Eclipses Understand the stellar Magnitude Scale a tilted orbit -- leads to the Seasons Summary Prof. David Lind, FSU Physics Split class: Planetarium Cowboy Astronomer w/ Baxter Black” Which star is the young man told to watch over the course of the night? Watch for how the ancients coupled the cycles in the sky to their lives. Watch for the motions of the celestial sphere. Basic Motions of Earth Rotation about an axis 24 Hours Revolution about the Sun 365.242199 Days (vernal equinox to vernal equinox) 365.256366 Days (one revolution about the Sun) Revolution about the galactic center 240 million years Motion towards Andromeda A few billion years Fig. 4-2b, p.56
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2 Seasons The Earth’s axis Tilted by 23.5 o with respect to orbital plane. So, at any given place on Earth, the flux flux of sunlight varies from day to day. Also causes variations in length of day.
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern