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Humongous! Distances in the Universe
"Space is big. Really big. You just won't believe how vastly,
hugely, mind-bogglingly big it is. I mean, you may think it's a long way
down the road to the drug store, but that's just peanuts for space."
"The hitchhiker's guide to the universe", Douglas Adams, 1979 |
Assignments:Look at HW#1Start reading Chapter 4.1 and 4.2 of your text "From Earth to the Universe" |
Introduction:
Announcements: 1. Distributed next week's lab 2. Bring Calculators to lab, class (not obs labs) 3. Extra Credit Problems: Card collection scheme. 4. Remember to start working on HW #1 (on Monday is best, probably), and read Chapter 4 sections 1&2. 5.How to get to our web page 6.Yesterdays lunar eclipse (on board diagram with distances in miles) Question: 11:05:00 ET beginning of total eclipse on earth. If there was an astronaut on the moon, when would he have said the eclipse started? Now, remember that space is terribly empty! Answer:
For class purposes:
The Ultimate speed! Nothing moves faster! ET call home. (Astronaut Buck "Dreamy" Weaver.) Demo with laser & creamer. So how long to California with Sat-phone? 3.59 x 10^7 m X 2 Actually, a good starting point!
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