Exam 3 Recap Info

Question 1

High mass or low mass star: forms faster due to stronger gravity

Answer 1

High mass

Question 2

High mass or low mass star: born with less hydrogen and helium

Answer 2

Low mass

Question 3

High mass or low mass star: slower fusion rates due to lower core temperature

Answer 3

Low mass

Question 4

High mass or low mass star: longer lifetime

Answer 4

Low mass

Question 5

High mass or low mass star: only able to fuse lighter, less repulsive nuclei

Answer 5

Low mass

Question 6

High mass or low mass star: after main sequence becomes supergiant

Answer 6

High mass

Question 7

High mass or low mass star: dies in violent supernova

Answer 7

High mass

Question 8

High mass or low mass star: leaves core as a neutron star, black hole, or nothing

Answer 8

High mass

Question 9

Sunspot

Answer 9

Dark spot cooled by strong local magnetic field poking out of sun

Question 10

Flare

Answer 10

Explosion on sun from magnetic field snapping, just emits light

Question 11

How long is a sunspot cycle? What causes it?

Answer 11

11 years; by magnetic field reversing polarity

Question 12

Distance object must be to shift one arcsecond over six months

Answer 12

Parasec

Question 13

Parallax

Answer 13

The angle an object seems to move when you look at it from two different vantage points

Question 14

Transit method

Answer 14

Only works if we see edge on

Star dims as planner passes in front of it

Question 15

Doppler shift

Answer 15

Planet makes star wobble as it orbits

Works for range of inclinations, still won’t see face-on system

Question 16

What spectral type is the sun?

Answer 16

G

Question 17

What tells you the surface temperature of the star, and gives an idea of its color

Answer 17

Spectral type

Question 18

What tells you how much energy the star is generating

Answer 18

Luminosity

Question 19

What tells you the stage the star is in

Answer 19

Luminosity class

Question 20

Spectral type

Answer 20

OBAFGKM - surface temp and color

Question 21

Given by Roman numerals

Answer 21

Luminosity class (tells stage)

Question 22

Usually given in units like 100Lsun

Answer 22

Luminosity

Question 23

Metalicity

Answer 23

Describes how polluted a star is with heavy elements generated by previous generations of stars

Question 24

Types of stars that can be open cluster

Answer 24

High mass
Young stars
High metallicity
High mass star death

Question 25

Types of stars that can be globular

Answer 25

Old stars
Low metalicity
Over weight WD SN

Question 26

Types of stars that can extend open or closed (both)

Answer 26

Low mass stars
Main sequence stars
Stars 70% H and 29% He

Question 27

Rouge planet

Answer 27

Planet

Question 28

A planet that was ejected from its star and wanders through space, not orbiting any star

Answer 28

Rouge planet

Question 29

A massive planet orbiting shockingly close to its host star

Answer 29

Hot Jupiter

Question 30

A lower mass planet that is still more massive than earth

Answer 30

Super earth

Question 31

A planet close enough to its star that it is warm enough for water to be a liquid

Answer 31

Habitable planet

Question 32

A failed star but sometimes mistaken for a planet

Answer 32

Brown dwarf