Notes

Slide Show

Outline

1	Astronomical Tools Chapter 5
2	Astronomical Telescopes
3	Light and Other Forms of Radiation The Electromagnetic Spectrum
4	Light as a Wave (I) Light waves are characterized by a wavelength l and a frequency f.
5	Wavelengths and Colors Different colors of visible light correspond to different wavelengths.
6	Dark Side of the Moon “There is no dark side really. It’s all dark.” -- Pink Floyd
7	Dark Side of the Moon What is wrong with this picture? Front: Not all primary colors (eg, pink, magenta), also refraction angles inconsistent Back: Spectrum is Convergent – I think done for art’s sake
8	Light as a Wave (II) Wavelengths of light are measured in units of nanometers (nm) or angstrom (Å):
9	Light as Particles Light can also appear as particles, called photons (explains, e.g., photoelectric effect). A photon has a specific energy E, proportional to the frequency f:
10	The Electromagnetic Spectrum
11	Refracting / Reflecting Telescopes
12	Secondary Optics
13	Disadvantages of Refracting Telescopes
14	The Powers of a Telescope: Size does matter!
15	The Powers of a Telescope (II)
16	Seeing
17	The Powers of a Telescope (III) 3. Magnifying Power = ability of the telescope to make the image appear bigger.
18	The Best Location for a Telescope
19	The Best Location for a Telescope (II)
20	Traditional Telescopes (I)
21	Traditional Telescopes (II)
22	Advances in Modern Telescope Design
23	Adaptive Optics
24	Examples of Modern Telescope Design
25	Interferometry
26	CCD Imaging
27	Negative Images
28	The Spectrograph
29	Radio Astronomy
30	Radio Telescopes
31	Radio Maps
32	Radio Interferometry
33	The Largest Radio Telescopes
34	Science of Radio Astronomy
35	Infrared Astronomy
36	Infrared Telescopes
37	Ultraviolet Astronomy Ultraviolet radiation with l < 290 nm is completely absorbed in the ozone layer of the atmosphere.
38	NASA’s Great Observatories in Space (I)
39	Hubble Space Telescope Images
40	NASA’s Great Observatories in Space (II)
41	NASA’s Great Observatories in Space (III) The Chandra X-ray Telescope
42	Chandra X-ray Observatory
43	The Highest Tech Mirrors Ever! Chandra is the first X-ray telescope to have image as sharp as optical telescopes.
44	NASA’s Great Observatories in Space (IV)
45	Spitzer Space Telescope Images
46	Spitzer Space Telescope Discovered by a Wyoming grad student and professor. The “Cowboy Cluster” – an overlooked Globular Cluster.
47	Kepler’s Supernova with all three of NASA’s Great Observatories Just 400 years ago: (Oct. 9, 1604) Then a bright, naked eye object (no telescopes) It’s still blowing up – now 14 light years wide and expanding at 4 million mph. There’s material there at MANY temperatures, so many wavelengths are needed to understand it.
48	A Multiwavelength Look at Cygnus A A merger-product, and powerful radio galaxy.
49	The Future of Space-Based Optical/Infrared Astronomy: