Astronomy and Cosmologies Wed 30 Mar week 1
- Slides: 9
Astronomy and Cosmologies Wed. 30. Mar, week 1, Spring 2005, Zita • • Ch. 1: Astronomy & the Universe Write your question on the board Discuss questions Discuss ET workshop questions • Space & Time workshop • Preview Ch. 1 online quiz • Work some example problems
Distances and angles Even if we don’t know the distance to an object, angles are easy to measure. By total coincidence, the Sun and Moon happen to subtend nearly the same angle from Earth at the moment. Therefore, we can have eclipses.
Small-angle formula D = a d where the angle a is in radians. 360 o=2 p radians D and d have the same units (e. g. both in meters).
Calibrate your hand binocs In this week’s Space and Time workshop, you’ll use your hands to find angles. Also discover the field of view of your binocs.
Space and Time workshop
Angles and distances 2 p radians = 360 degrees 1 degree = 60 arcminutes 1 arcminute = 60 arcseconds 1 AU = 93 million miles = 150 million km 1 parsec ~ 3 light years Ly = distance light travels in one year Ly = speed * time ~ 3 x 108 m/s*3 x 107 s Ly =____________
Online Quiz Ch. 1 Preview
Looking ahead…
Research planning • Read our Research webpage • Browse past projects and candidate topics • What are you especially interested in? Black holes? Jupiter’s moons? • Think about • What you might observe • What questions you might investigate • Cosmologies, modern and ancient • Measurements/calculations you might do
Learning astronomy by doing astronomy
Learning astronomy by doing astronomy
Learning astronomy by doing astronomy
Week by week plans for documenting children's development
Astronomy questions and answers multiple choice
Michigan state university physics
What is astronomy
Claudius ptolemy astronomy contributions
Astronomy greek roots
Swinburne astronomy
