Lec10 - Assignments For Wed, 28 Sep: Do Online Exercise 06...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Assignments • For Wed, 28 Sep: Do Online Exercise 06 ("Motion & Gravity" tutorial) • For Friday, 30 Sep: – Do Written HW #2 E xercise 07 ("Light & Spectroscopy" tutorial deferred to Monday, 03 Oct. – see updated course Calendar
Background image of page 1

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

View Full DocumentRight Arrow Icon
Circular Orbital motion but V=2 π r/P r 3 /P 2 =(G/4 π 2 ) M M/M sun = (r/au) 3 (P/yr) 2 _______ V 2 = GM/r with M=M sun with and r=a => Kepler’s 3 rd law: (a/au) 3 = (P/yr) 2
Background image of page 2
Pop Quiz 1. A planet orbits a star of mass 2 M sun at a distance of 2 AU. In earth years, about how often would beings on this planet celebrate birthdays? a. 1 b. 1/2 c. 4 d. 2
Background image of page 3

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

View Full DocumentRight Arrow Icon
Relative Mass of Orbiting Bodies Center of mass – lies between bodies – but closer to heavier
Background image of page 4
Newton’s Generalized Version of Kepler’s Third Law M + m = a 3 / P 2 where: M+m is combined mass of 2 orbiting bodies in Solar masses a is their mean separation in AU P is the period of their orbit in years This law is a key linchpin of modern astronomy!
Background image of page 5

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

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 13

Lec10 - Assignments For Wed, 28 Sep: Do Online Exercise 06...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online