Linking Lab 1 Astr101

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Basic Coordinates & Seasons – Student Guide

There are three main sections to this module: terrestrial coordinates, celestial equatorial coordinates, and understanding how the ecliptic is related to seasons on the Earth. Each of these sections has its own simulator(s). The background material necessary to utilize these tools is contained in each section.

Terrestrial Coordinates
Work through the explanatory material on units of longitude and latitude, finding longitude and latitude, and a bit of history (optional). * Open the flat map explorer. * Familiarize yourself with the cursor and how it prints out the longitude and latitude of the active map location. * Note that you can vary the central meridian of the map
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What is its shape?

Answer: The north pole is located on the top and is a flat line

B) Where is the north pole on the globe explorer? What is its shape?

Answer: Top of the globe and is a dot

C) Your answers to parts A and B should be different. Explain why. Answer: Flat map is laid out in a flat grid map and the globe is an interactive ‘globe’ that shows true position.

Question 5: Compare the relative sizes of Greenland and Australia in the two maps? The true values of the surface areas for these countries are Greenland (2.2 million km2) and Australia (7.7 million km2). Does each map demonstrate these true values?

Flat map makes Greenland look much bigger than Australia, but in the global is the actual true map as the earth really is (spherical)

Celestial Equatorial Coordinates
Work through the introductory material on the page entitled Celestial Equator, Declination, Right Ascension. * Open either the Flat Sky Map Explorer or the Sky Map Explorer. * Familiarize yourself with the same set of features (cursor movement, shifting the map, decimal/sexagesimal) that were available on the previous maps. * Make sure that you understand what each check box does. Question 6: Where is the star Polaris located on this map? What are its coordinates?

Delta = 89.2 degrees / Alpha – 2.5h

Question 7: Find the constellation of Orion shown in

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