Topic 13 - Exploring Starlight Flashcards
1
Q
What information can be obtained from a stellar spectrum?
A
- Chemical composition
- Temperature
- Radial Velocity
2
Q
What is the relationship between distance and light intensity?
A
Distance is inversely proportional to light intensity squared.
3
Q
What is a parsec?
A
The distance at the parallax angle of a star is 1 arcsec
4
Q
What radiation does Earth’s atmosphere not block?
A
Visible and radio
5
Q
What telescopes should be located at sea level?
A
Optical and radio telescopes
6
Q
What is it called when multiple radio telescopes work together?
A
Aperture synthesis system
7
Q
Why has radio astronomy been important?
A
It has been important in the discovery of quasars, jets from black holes, the structure of the Milky Way and protoplanetary discs.
8
Q
Why has infrared Astronomy been important?
A
