Introduction to Astronomy

Miscellaneous announcements Get started on your first observing project. Anyone interested in the astrophotography project? No class Monday (happy Labor Day).

First homework is due Wednesday. The Stars from Different Latitudes 1 September 2006

Today: How the stars change as you move to different latitudes on earth Using the stars to measure the size of

the earth From other locations Longitude (E-W location) doesnt matter, except to determine time of day

Latitude matters: For every 70 miles traveled north, northern stars get 1 higher, southern stars 1 lower So a 360 shift would presumably take 360 x 70 miles, or 25,000 miles: the earths

circumference! The Two-Sphere Universe The earth is a much smaller sphere at the

center of the celestial sphere. As you move around on the earth, your horizon changes

orientation so you see a different half of the celestial sphere. This model dates back to ancient Greece,

2500 years ago.

Recently Viewed Presentations

  • Vigyan Ashram - Amazon Web Services

    Vigyan Ashram - Amazon Web Services

    NIOS admission and exam fees. Support by other organizations. DBRT and short term courses - E-Boss, Tech Mahindra Foundation ... got selected as Supernod to conduct weekly review of students from regional fab labs in India on behalf of Fab...
  • WRITING SCIENTIFIC ARTILE JOURNAL - Universitas Brawijaya

    WRITING SCIENTIFIC ARTILE JOURNAL - Universitas Brawijaya

    Soil pH was measured in 1:2.5 ratio soil solutions (with de-ionized water) with a pH meter (Jenway 3305). The Walkley and Black wet oxidation method was used to determine organic C content (Soil Survey Laboratory Staff, 1992. Total N content...
  • Type 2 Diabetes Management Goals

    Type 2 Diabetes Management Goals

    Fat. Specify healthful fats (low mercury/contaminant-containing nuts, avocado, certain plant oils, fish) Limit saturated fats (butter, fatty red meats, tropical plant oils, fast foods) and trans fat; choose fat-free or low-fat dairy products . Protein
  • Teleskop - Gimnazija Šentvid

    Teleskop - Gimnazija Šentvid

    1990 z Vesoljskim čolničkom Discovery reflektor tipa Cassegrain, zrcalo premera 240 cm 569 km nad tlemi, obhod v 97 minutah (8 km/s) več inštrumentov, ki merijo v različnih valovnih dolžinah sprva neostre slike zaradi sferične aberacije glavnega zrcala od popravila...
  • Paris Peace Conference SIMUL ATION PROCEDURE 1. The

    Paris Peace Conference SIMUL ATION PROCEDURE 1. The

    Motion to suspend the meeting for the purposes of a regular caucus or a moderated caucus. A delegate may move for this point to ask the chairperson a question regarding the rules of procedure. Motion to change the length of...
  • MAT1225 - Seattle Pacific University

    MAT1225 - Seattle Pacific University

    Homework *.doc Type with Equation Editor *.docx Saved to.docx to type with MS Equation Editor Homework Group HW Individual HW Group Homework You are required to work together in a group of 2 or 3. Individual Homework No discussion with...
  • The Lean Dot Game - Meetup

    The Lean Dot Game - Meetup

    Given the below-mentioned assumptions, the following formula (a variant of what's called "Little's Law") can estimate the average WIP time for a post-it (a.k.a. Cycle Time (CT))*2*3. CT = WIP/TH. Where TH means Throughput. And WIP means Work In Process....
  • The Late Middle Ages

    The Late Middle Ages

    EUROPEAN MEDIEVAL TOWNS AND TRADE ROUTESItalian city-states and cities of the Hanseatic League dominated trade in western Europe during the late Middle Ages. Merchants from Venice and Genoa brought silks and spices from the eastern Mediterranean to northern markets, where...