Course Announcements • Observatory Signup List (starting in about a week - across from room 204 in the Steward Observatory building). The actual telescope is in that white building with the big circular dome for a roof. • DRC Letters ASAP • Tentative - Tail Gate Party Dates (a.k.a Exam Review Sessions) From 4:00 pm – 6:00pm on: • Wednesday Feb 7th in N210 • Wednesday March 7th in N210 • Wednesday April 4th in N210
Goals of the course Help you develop: a basic understanding of the central ideas of astronomy an appreciation for the role astronomy has played in shaping the consciousness of the world in the past, at present and what the future holds. a real world perspective for how astronomy is connected to your daily lives the skills and motivation to pursue life long learning and become a valuable member of the workforce and our society
NOT Goals of the course Turn you into Math-oholics! Expect you to sit there and listen to me lecture for an hour everyday Force you to work through an endless array of unconnected homework, labs and writing assignments (don’t worry you will still EARN your three credits!) Teach you essentially the same stuff as I do the astronomy majors
Cute is not Science http://www.milaadesign.com/wizardy.html Don’t let cute be confused with REALITY!! Crating a website that shows that you know the numerical sequence that produces the number 9 = cute but not Clairvoyant!! NOT ALL THINGS ARE REAL OR EVEN CLEVER BUT SCIENCE IS BOTH OF THESE EVEN WHEN IT LATER TURNS OUT TO BE INCOMPLETE OR WRONG!!!!
You Live in THIS Society; Like it or Change it or Leave!! Intelligent Design, EVOLUTION, Flying Spaghetti Monster http://www.venganza.org/about/open-letter/
You Live in THIS Universe; Live With It or Leave!! “There is a theory which states that if ever anyone discovers exactly what the Universe is for and why it is here, it will instantly disappear and be replaced by something even more bizarre and inexplicable. There is another which states that this has already happened.” by Douglas Adams, from The Restaurant at the End of the Universe
Science is not… • A list of previously known facts about nature • A list of equations handed down from Ancient times • A set of laws that were discovered by Dead White Guys a long time ago and are kept from the general public
Science Is… • a continuing process that • seeks to understand the rules and laws of nature • uses systematic observations • uses mathematical models • experimentally tests ideas • subject to independent verification These are the components of the scientific method (observe, theorize, predict, test and modify) used to comprehend the universe.
What do Astronomers do? • Make observations using telescopes • Analyze data/results of observation • Create theories about what is seen and what might exist yet unseen • Create computer models that simulate what occurs in the universe • Invent, design, and build instruments that let us see beyond the Earth! BUT, most astronomers do NOT spend much time looking through telescopes
Ascientific theoryis a collection of ideas that explain a phenomenon in a way that is consistent with laws, observations and experiments.
Note the remote-control rover, Sojourner, next to a Martian rock 1999 Picture from the Mars Pathfinder Lander
We did it!! Huygens takes first images of Titan and survives the crash landing!! http://www.esa.int/SPECIALS/Cassini-Huygens/index.html
The Montillation of Traxoline It is very important that you learn about traxoline. Traxoline is a new form of zionter. It is montilled in Ceristanna. The Ceristannians gristerlate large amounts of fevon and then brachter it to quasel traxoline. Traxoline may well be one of our most lukized snezlaus in the future because of our zionter lescelidge. (attributed to the insight of Judy Lanier)
The Montillation of Traxoline It is very important that you learn about traxoline. Traxoline is a new form of zionter. It is montilled in Ceristanna. The Ceristannians gristerlate large amounts of fevon and then brachter it to quasel traxoline. Traxoline may well be one of our most lukized snezlaus in the future because of our zionter lescelidge. Directions: Answer the following questions in complete sentences. Be sure to use your best handwriting. 1. What is traxoline? 2. Where is traxoline montilled? 3. How is traxoline quaselled? 4. Why is it important to know about traxoline?
The number of stars in the universe today is approximately equal to the number of grains of sand on all the beaches of Earth!!
The numbers in astronomy are so large, and small, that astronomers use scientific notation. 100 = 1 101 = 10 102 = 100 103 = 1000 5.3 x 103 = 5,300 104 = 10,000 8.9 x 104 = 89,000 and, for small numbers 10-1 = 0.1 10-2 = 0.01 2.1 x 10-2 = 0.021 10-3 = 0.001 6.6 x 10-3 = 0.0066
Astronomical distances and sizes are very very very very large. So, astronomers use different units. • One “Astronomical Unit” (AU) • average distance between Sun and Earth • 93,000,000 miles • 150,000,000 km • 1.5 x 108 km • Distance Light Travels in One Year is a “Light-year” (LY) • 9.46 x 1012 km • 63,000 AU or 6.3x 104 AU • 0.307 parsecs (pc)
At the scale of the size of a planet or moon we describe things in terms of kilometers (km)
At the scale of the Solar System distances are described in terms of the Astronomical Unit or AU (ave. distance from Earth to the Sun).
At the scale of the Milky Way Galaxy distances are described in terms of Light-years which is the distance light travels in one year.
Thousands of km Astronomical Unit A few to about 1,000 Light-years 10,000 to 100,000 Light-years Millions of Light-years Billions of Light-years
My wish is that this experience will make you a better human!! Breath!!! Life is a journey not a destination! The only certain thing in life is change!!
GO CONFIDENTELY IN THE DIRECTION OF YOUR DREAMS!! LIVE THE LIFE YOU’VE IMAGINED