9
Hydrogen and the Structure of Galaxies
Lecture no. 9 from the course: Radio Astronomy: Observing the Invisible Universe
Loading the player...
Taught by Professor Felix J. Lockman | 32 min | Categories: Science
Using the laws of physics and electromagnetic radiation, astronomers can "weigh" a galaxy by studying the distribution of its rotating hydrogen. But when they do this, it soon becomes clear something is very wrong: A huge proportion of the galaxy's mass has simply gone missing. Welcome to the topsy-turvy world of dark matter-which we now believe accounts for a whopping 90 percent of our own Milky ...
25 Lectures
1
Radio Astronomy and the Invisible Universe
0
of 31 min
2
Thermal Radio Emission: The Planets
0
of 29 min
3
The Birth of Radio Astronomy
0
of 30 min
4
The Discovery of Interstellar Hydrogen
0
of 27 min
5
Radio Telescopes and How They Work
0
of 34 min
6
Mapping the Hydrogen Sky
0
of 31 min
7
Tour of the Green Bank Observatory
0
of 29 min
8
Tour of the Green Bank Telescope
0
of 31 min
9
Hydrogen and the Structure of Galaxies
0
of 32 min
10
Pulsars: Clocks in Space
0
of 30 min
11
Pulsars and Gravity
0
of 31 min
12
Pulsars and the 300-Foot Telescope
0
of 32 min
13
The Big Bang: The Oldest Radio Waves
0
of 31 min
14
H II Regions and the Birth of Stars
0
of 31 min
15
Supernovas and the Death of Stars
0
of 32 min
16
Radio Stars and Early Interferometers
0
of 30 min
17
Radio Source Counts
0
of 31 min
18
Active Galactic Nuclei and the VLA
0
of 31 min
19
A Telescope as Big as the Earth
0
of 31 min
20
Galaxies and Their Gas
0
of 31 min
21
Interstellar Molecular Clouds
0
of 32 min
22
Star Formation and ALMA
0
of 33 min
23
Interstellar Chemistry and Life
0
of 33 min
24
The Future of Radio Astronomy
0
of 37 min
25
Three New Discoveries
0
of 13 min
