Motion of the Planets Cycles and Starry Night Activity Guest Speaker, Greg Redfern, NASA JPL Planetary Ambassador Telescope Observing Session (weather will not permit - cancelled) Cycles of the Moon The Phases Guest Speaker Steve Berr, Learning Technologies Inc. (demonstration of StarLab...

Leslie Looney Phone: 244-3615 Email: lwl @ uiuc . edu Office: Astro Building #218 Office Hours: MTF 10:30-11:30 a.m. The Drake equation. Lets take some time to get our bearings around the Universe. How big is it? How many observable stars? What are the important scales? Light is important...

Asthepericenterdistancebecomesreallylarge(muchlargerthananyofthedistancesyoutried out), What happens Tothe merging Time? Why do youthink this happens (think about The numbersofstarsthatinteractinthegalaxiesasyouincreasetheseparationdistance)?

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0 1 0 0 FourEqual { /plateindex 1 def } { % yellow plate? % is this not 1 or 8 bit?

MThought Questions: Under what conditions or when observing what kinds of objects would relative flux measurements be acceptable? What advantages do relative flux measurements have over calibrated?

One more "wrinkle" in all this. All pulsations we have discussed are radial. What if there are non-radial pulsations present? Two periods, one short (less than a day) one long (months) superimposed. It is just like adding sine waves of different frequency. Binary systems...

11 (6 pts) Later this Summer (Aug 12th), the Earth"s atmosphere will be bombarded by particles from the Perseids meteor shower. Explain why they always hit the Earth in Mid-August. 12 (5 pts) Rocks from the Moon are very old. Explain why they are not primitive. Pts) Which of the...

It"s winter and the Sun rises in the Southeast You are dropped onto an unknown location on Earth (with no GPS). Cleverly, you note that Polaris is about 30o above the horizon. What"s your latitude? What would happen to the seasons if the earth were tipped at 35 degrees,...

2!! Astronomy 102, Autumn 2008, Copyright@2008 E. Agol & J. Dalcanton U.W. How much mass is converted to energy every second?