Textbook Notes (378,588)
CA (167,186)
UTSG (10,973)
AST (204)
AST101H1 (135)
Chapter 2

# Chapter 2 Continued

3 Pages
95 Views

Department
Astronomy & Astrophysics
Course Code
AST101H1
Professor
Clifford Orwin

This preview shows page 1. Sign up to view the full 3 pages of the document.
Astronomy Section 2.3 and 2.4 Notes
Oct/3/2010
2.3 The Moon, Out Constant Companion
Takes moon 271/3 days to orbit Earth.
Takes 271/3 days for each circuit through constellations.
Lunar phases: The state determined by the portion of the visible face of the Moon that is
illuminated by sunlight.
During full moon, we see half the moon that is lit by sunlight.
During new moon we don’t see the moon because the sun isn’t illuminating the part we
see at all.
Each cycle of phases from one new moon to the next takes apprx. 291/2 days. Longer
than Earth’s orbital period b/c o’ Earth’s motion around sun during time moon is orbiting
Earth.
Moon’s phase is related to time it rises, reaches highest point in sky, and sets.
Phases from new to full are waxing (increasing).
Phases from full to new are waning (decreasing.)
First-quarter/Third-quarter indicates the times when moon is one-quarter or three quarters
finished its monthly cycle.
Phase just before and after new moon are called crescent (light sliver).
Phase just before and after full moon are called gibbous (dark sliver).
We always see same face of the moon b/c moon has synchronous rotation (It’s orbital
period and rotation period are equal).
Moon’s synch. rot. caused by Earth’s gravity affecting the moon like the moon’s gravity
affects tides on Earth.
A new moon occurs when the Moon is between the Sun and Earth.
www.notesolution.com

#### Loved by over 2.2 million students

Over 90% improved by at least one letter grade.

OneClass has been such a huge help in my studies at UofT especially since I am a transfer student. OneClass is the study buddy I never had before and definitely gives me the extra push to get from a B to an A!

Leah — University of Toronto

Balancing social life With academics can be difficult, that is why I'm so glad that OneClass is out there where I can find the top notes for all of my classes. Now I can be the all-star student I want to be.

Saarim — University of Michigan

As a college student living on a college budget, I love how easy it is to earn gift cards just by submitting my notes.

Jenna — University of Wisconsin

OneClass has allowed me to catch up with my most difficult course! #lifesaver

Anne — University of California
Description
Astronomy Section 2.3 and 2.4 Notes Oct32010 2.3 The Moon, Out Constant Companion 13 Takes moon 27 days to orbit Earth. Takes 27 days for each circuit through constellations. Lunar phases: The state determined by the portion of the visible face of the Moon that is illuminated by sunlight. During full moon, we see half the moon that is lit by sunlight. During new moon we dont see the moon because the sun isnt illuminating the part we see at all. 12 Each cycle of phases from one new moon to the next takes apprx. 29 days. Longer than Earths orbital period bc o Earths motion around sun during time moon is orbiting Earth.
More Less

Only page 1 are available for preview. Some parts have been intentionally blurred.

Unlock Document

Unlock to view full version

Unlock Document
Notes
Practice
Earn
Me

OR

Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Join to view

OR

By registering, I agree to the Terms and Privacy Policies
Just a few more details

So we can recommend you notes for your school.