Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Astronomy 101 Section 4
Document related concepts
Space Interferometry Mission wikipedia , lookup
Drake equation wikipedia , lookup
History of Solar System formation and evolution hypotheses wikipedia , lookup
Aquarius (constellation) wikipedia , lookup
Formation and evolution of the Solar System wikipedia , lookup
Outer space wikipedia , lookup
Dialogue Concerning the Two Chief World Systems wikipedia , lookup
Fermi paradox wikipedia , lookup
Geocentric model wikipedia , lookup
Observational astronomy wikipedia , lookup
Shape of the universe wikipedia , lookup
History of astronomy wikipedia , lookup
Ultimate fate of the universe wikipedia , lookup
Non-standard cosmology wikipedia , lookup
Astrobiology wikipedia , lookup
H II region wikipedia , lookup
Rare Earth hypothesis wikipedia , lookup
High-velocity cloud wikipedia , lookup
Planetary habitability wikipedia , lookup
Corvus (constellation) wikipedia , lookup
Expansion of the universe wikipedia , lookup
Lambda-CDM model wikipedia , lookup
Fine-tuned Universe wikipedia , lookup
Flatness problem wikipedia , lookup
Physical cosmology wikipedia , lookup
Extraterrestrial life wikipedia , lookup
Transcript
Astronomy 101 Section 020 Lecture 1 John T. McGraw, Professor Laurel Ladwig, Planetarium Manager Introduction The syllabus – The success of this class depends upon your success! – Responsibility for assignments to attend class to prepare interesting, educational lectures and activities to talk to someone when something isn’t right A Brief Tour of the Universe Our tour starts from our Earth, the only planet known to harbor life. Earth and its moon are almost a “double planet.” Mars is a “rocky,” or terrestrial planet that once had surface water. The sun and planets to scale. Is our multi-planet solar system unique? Comets and asteroids also orbit the sun. The Sun, a normal star, is the heart of our solar system. All of the stars we see at night are in our Milky Way Galaxy. So are all the nebulae that mark star birth and star death. The Milky Way - self-portrait. The Milky Way - detail. (with apologies to Gary Larson) Our tour continues with a visit to the nearest galaxies - here the Large Magellanic Cloud. Many galaxies are spirals, similar to our Milky Way. The most numerous galaxies are ellipticals. We’ll visit galaxies in collision - or worse! Most galaxies tend to cluster - or even supercluster! A quasar (it’s the “star” on the right) - pretty boring until you get close. But not too close! The most distant reaches of the universe are populated by galaxies and quasars. Galaxies map the structure of the universe. The Earliest Observable Universe – And Structure is Present News of the universe! … (make your own “clack, clack, clack” wire service sounds here) 90% of the Universe is missing! We all know that the Universe is expanding – but now it is accelerating! Particles from the center of the sun bombard Earth – but what flavor are those particles? Stay tuned for more – much more!
