'Cepheid variable stars' presentation slideshows

Chapter 20 Galaxies and the Foundation of Modern Cosmology

Chapter 20 Galaxies and the Foundation of Modern Cosmology. 20.1 Islands of Stars. Our goals for learning: How are the lives of galaxies connected with the history of the universe? What are the three major types of galaxies? How are galaxies grouped together?.

805 views • 63 slides

The Milky Way

The Milky Way. Our home galaxy, full of stars, gas and mysterious dark matter We decompose it into a disk and a halo and a few other parts. Second Exam Results. Mean: 53.7 + 20 pt curve = 73.9 Standard deviation: 10.4 Maximum: 76 raw, 92 curved ; Minimum: 36 raw, 56 curved.

701 views • 62 slides

Observational Cosmology

693 views • 52 slides

Brightness and Distance Measurement

Brightness and Distance Measurement. Flux and Intensity/Brightness. F lux (density) (Wm -2 Hz -1 ) Energy Time Area Frequency/Wavelength interval Intensity/surface brightness (Wm -2 Hz -1 sr -1 ) Flux density / unit solid angle

588 views • 40 slides

The Milky Way Galaxy

531 views • 40 slides

Evidence for Stellar Evolution

Ohio University - Lancaster Campus slide 1 of 34 Spring 2009 PSC 100. Evidence for Stellar Evolution. What evidence do we have that stars evolve the way we think they do?.

449 views • 34 slides

HR Diagrams

HR Diagrams. AST 112. Measurements. We can measure: Temperature Mass Spectra Size Luminosity Distance We can make measurements on trillions of stars. A pattern? Seriously?.

393 views • 27 slides