Astronomy 1210 -- April 6, 2012 (30)
Important Topics from Last Time
- Tonight is a first Friday. It will be clear. Take your friends to visit McCormick Observatory.
- Exam 3 review questions are available. The test is one week from today.
- There will be a review session starting at either 4:30 or 5:00 p.m. on Wednesday. Location will be announced in Wednesday's class and on the course home page..
- Because of travel next week my usual office hours will be rescheduled to 10:00-11:00 a.m. and 1:30-3:00 p.m. on Wednesday.
- The "constellation of the week" is Gemini - see also
Today's Key Topics
- The cratering history of the Earth
- Large impacts, their frequency and influence on life and civilization
- The odds of substantial harm
- Cataloging potential hazards
- Protecting the Earth
- The atmosphere of Venus
- Carbon dioxide and the Greenhouse Effect
- Radar imaging of the surface of Venus
- Today: Cosmic Perspective Sections 9.5 and 10.5; A recent threatening asteroid
- Next Lecture: Section 11.2 (icy surfaces); Wednesday next week 9.4 and 10.4
- The Moon is Full today. Watch for it to rise as the Sun sets.
If it looks extra big while it is rising you are experiencing an
- Jupiter is quickly getting lost in evening twilight while Venus continues to creep eastward amongst the background of stars, avoiding the Sun. Venus is right
in the middle of Taurus near the Pleiades and Hyades star clusters.
- Mars is prominent in the eastern sky in the early evening. Its red color is evident.
- Face Orion in the evening and you will find the stars of Gemini (made evident by the bright pair Castor and Pollux) above Orion.
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National Weather Service Current Forecast
Current location of the Wide Field Infrared Survey Explorer (WISE)