wxvatzna

Science

### Question Description

Lab assignment regarding basic concepts of astronomy.

The lab sheet is short.

### Unformatted Attachment Preview

Purchase answer to see full attachment

## Final Answer

Ok, here you go for the first one. Check it out and let me know if you have any questions.

Astronomy Lab 3

Measuring the Size of the Earth

To be completed after reading Arny Chapter 1

Name: _________________

Introduction: By approximately 200 B.C. a Greek scholar named Erastothenes had

already come up with an astonishingly accurate calculation of the size of the earth. He

knew that at noon on a certain day, shadows in a town a fixed distance south were

directly below the objects casting them. He measured the angle of the shadows in his city

on that same day, and with that angle, and the distance between the two cities, he was

able to compute the size of the earth. In this lab you will calculate the size of the earth

using a very similar technique, but using the star Polaris rather than the Sun.

Theory: Two cities on the globe, one of which lies directly north of the other, can be

idealized and portrayed as simply two points on the edge of a circle with the distance

between them being the arc length, s. With this si...