Chapter 15 Exoplanets Flashcards
1
Q
How can we detect exoplanets?
A
- Direct imaging
- Doppler shift
- brightness change in star due to planets passing in front of the star
2
Q
How many exoplanets have been found
A
2000
3
Q
What’s is radial velocity?
A
Velocity along our line of sight
4
Q
Why do we find giant planets near there sun?
A
Hot Jupiters will migrate over millions of years due to friction with the solar nebula
5
Q
What types of stars are more likely to have there own planets
A
More metal rich stars
6
Q
What are some characteristics of brown dwarves?
A
Low mass
Can’t initiate nuclear fusion
7
Q
What is the habitable zone?
A
An distance from a start that allows a planet to have liquid water
8
Q
What are the flaws of the calculation to find the habitable zone?
A
It only takes in distance from the star and size of the star, nothing to do with atmosphere or greenhouse effect
