350 likes | 356 Views
PX269 Galaxies. Part 2: The Milky Way 2.1 Components and Structure. The Milky Way. Wei-Hao Wang University of Hawaii. First map of Milky Way: Sun near centre. Herschel, 1785. Globular cluster 47 Tuc, 2MASS. Distribution of globular clusters suggests Sun not close to centre. Wei-Hao Wang
E N D
PX269 Galaxies Part 2: The Milky Way 2.1 Components and Structure
The Milky Way Wei-Hao Wang University of Hawaii
First map of Milky Way: Sun near centre Herschel, 1785
Globular cluster 47 Tuc, 2MASS Distribution of globular clusters suggests Sun not close to centre
Wei-Hao Wang University of Hawaii Extinction in plane of Milky Way
NGC 6744, Milky Way-like galaxy Capella Observatory
M 51 the Whirlpool Galaxy HII regions
HII regions: the Orion Nebula Mike Fleenor
Pleiades open cluster Scattered light Philip Perkins
NGC 891 Optical Infra-red 2MASS CFHT
Wei-Hao Wang University of Hawaii
Part 2: The Milky Way 2.2 Kinematics
Galactic co-ordinates Carroll & Ostlie, 1996
Peculiar velocities of nearby stars Carroll & Ostlie, 1996
21 cm line profile along one line of sight Carroll & Ostlie, 1996
A = rotation curve for centrally-concentrated mass distribution B = rotation curve for extended mass distribution
First detection of a gravitational microlensing event Alcock et al 1993
Discovery of a 5 Earth mass planet Beaulieu et al 2006