Breaking News! Report of Faster-Than-Light Speed!
- the experiment: time of flight for neutrinos to go from CERN to Gran Sasso
- original paper posted last Thursday
- popular discussion: press release, NY Times, Cosmic Variance, Bad Astronomy
Our Milky Way Galaxy
Our Place in the Milky Way
- The naked eye Milky Way:
southern hemisphere, zoom to dark lanes - Galileo: telescope
- Immanuel Kant
- William Hershel's model (top view)
- Harlow Shapley globular cluster distribution: on the sky, top view in 3-D space
- interstellar dust
another example of scattering and absorption - simulated view of Milky Way seen from outside; a possible similar galaxy
Multiwavelength Milky Way: All-Sky Views
- optical: dust-obscured
- near infrared: stars, less dust
- radio at 21 cm: neutral hydrogen atoms
Galactic Rotation Curve
Milky Way Dark Matter
- What the heck is it?!?
- Case study: white dwarf dark matter
- predictions: we see omlettes, so where are the broken eggs?
- tests: HST non-observation and
of dim halo white dwarfs
other troubles
- favorite candidate today: exotic relic particles
underground detection experiment
