1. Today’s APODAPOD  IN-CLASS QUIZ TODAY  Hand in Homework 3 TODAY  Next Week: Kirkwood open Oct. 8  Read Chapter 5 (Earth) next week  Quiz 4 on Oct. 10 (in class) The Sun Today A100 Pictures!

2. Falcon 1  Carries a hexagonal aluminum alloy chamber as a simulated payload (weight 364 lbs, about five feet long)  An elliptical orbit of 500 km by 700 km, 9.2 degrees inclination from the equator First privately launched vehicle to make orbit

3. Oct. 2, 1608 Invention of the Telescope  Hans Lipperhey, spectacle-maker  Middelburg, Zeeland, Netherlands  States General discussed Lipperhey's application for a patent on the telescope on Oct. 2 (denied!)  Others also claim to have invented the telescope, but documentation not available  News of the telescope spread rapidly!

4. Homework Review  The Solar System Collaboratory (solarsystem.colorado.edu)The Solar System Collaboratory  Remember Kepler’s 3 rd Law p 2 = a 3

5. Astronomical Imaging  Spacecraft use cameras that measure light intensity only – no color  Cameras take pictures through colored filters  Each picture is a black & white image of the light intensity at a particular color. Opportunity’s view into Victoria Crater on Mars

6. Astronomy Rules! Astronomy is looking up!

9. Making Color Images  Multiple images are taken in different colored filters  Images are combined to produce a color picture

11. Panchromatic Cameras  “Camera Mast Assembly” on Spirit and Opportunity  Two CCD cameras  Each camera contains a filter wheel with filters that pass only specific colors of light

12. Getting the Colors Right  Each rover has a color calibration target  From B&W images of the calibration target, image scientists adjust the balance of color in the final, combined image by controlling the brightness of each B&W image when added together  The goal is to reproduce what it really looks like

14. Better eyes than ours…  The rover cameras are sensitive to a wider spectrum of light than our eyes can see  Cameras include ultraviolet and near-infrared filters to record images at wavelengths we can’t see  These filters enhance contrast for analyzing geological features

15. Pseudo-Color  BW intensity maps to color  No relation to true color

16. Victoria Crater in Color

17. TO DO LIST:  Hand in Homework 3 TODAY  Next Week: Kirkwood open Oct. 8  Read Chapter 5 (Earth) next week  Quiz 5 on Friday, Oct. 10 + HW4