1 / 8

Cosmology Today

Cosmology Today. Cosmic Answers, Cosmic Questions. The universe is flat, 13.7billion years old , and it is composition is as follows:. What is dark matter? What is dark energy? What caused inflation? Why is there an excess of matter over antimatter. The Expanding Universe. Modern Cosmology.

nariko
Download Presentation

Cosmology Today

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Cosmology Today

  2. Cosmic Answers, Cosmic Questions The universe is flat, 13.7billion years old , and it is composition is as follows: • What is dark matter? • What is dark energy? • What caused inflation? • Why is there an excess of matter over antimatter

  3. The Expanding Universe Modern Cosmology Slides based on material by Joe Mohr, Wayne Hu, Rocky Kolb and other web sites.

  4. 1. Introduction From the Earth to the Universe 108,1013,1022,1026m Standard Candles and Hubble Law 2. Modern Observations Measuring recession velocities Nature of light and emission Doppler effect Galaxy spectroscopy Estimating large distances Standard candles and rods Supernovae as standard candles Results from Type Ia supernovae Outline • 3. Interpretation • The bad neighbor hypothesis • Homogeneous expansion • 4. Summary

  5. NASA Image of Planet Earth 104 km Density 5000kg/m3 A high density anomoly Average density of universe 10-27 kg/m3

  6. Our Place in the Solar System Nine planets. SUN- average low mass star, ~109m diam, 1030kg Earth orbital radius: 1011m ( the only place in the universe where we know there is life.) Pluto orbit: 1013m Oort Cloud: 1014m, 1011 objects

  7. M31, the Andromeda Galaxy Our solar system lies within the Milky Way, a gal- axy much like M31. Nstars~1012. M~1043kg Rad~10kpc=30kly Density~10-17kg/m3 Distance~1Mpc Telescopes are time machines! The further we look, the further we see into the past If this picture were of the Milky Way, our solar system would lie here.

  8. Deep Hubble Space Telescope Image A younger part of the universe. A deep image of an “empty” portion of the sky with the Hubble Space Telescope reveals that the universe is filled with galaxies- many just like our own. The light we see from the most distant galaxies has traveled approx- imately 10 billion years to reach us. ~few 1000 galaxies density~10-27kg/m3

More Related