The Milky Way, Schroedinger’s Cat, and You. Galaxies, the Building Blocks of the Universe. Raja Guha Thakurta (in collaboration with Sandra Faber) UCO/Lick Observatory University of California at Santa Cruz.
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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
Galaxies, the Building Blocks of the Universe
Raja Guha Thakurta
(in collaboration with Sandra Faber)
University of California at Santa Cruz
Thursday, September 23, 2004 Astronomy 2 (ASTR –002-02)
Kresge Town Hall Overview of the Universe
Basic building blocks of life
Earth and Sun:
Home of the C,N,O atoms from which
these protein molecules were assimilated
Sun’s ancestral stars:
Their nuclear fusion reactions
produced these C,N,O atoms
The Answer Will Take Us Back to the Earliest Moments of the Universe
A Computer Simulation
Energy density of the Universe
0 0.99995 1.00000
Position in Space
Number of radiactive decays per minute
Number of kernels popping per minute
0 10 20 30
Schroedinger’s Cat(a “thought experiment” by Erwin Schroedinger)
A rapid and dramatic phase of expansion shortly after the Big Bang blows up these quantum fluctuations and “freezes” them into the fabric of the Universe. These are the seeds of cosmic structure.
The Hubble Space Telescope is in orbit above the Earth’s atmosphere and so is able to take sharp pictures……but…..
….. it is prohibitively expensive to build telescopes that are based in space
A new method called “Adaptive Optics” allows us to sharpen the vision of telescopes that are on the ground, by correcting for the blurring caused by the Earth’s atmosphere
like our own
Sun’s stellar ancestors
Our planet & star
Completing the Cycle……