Stars
Life Cycle of Stars
HR Diagram
Distance
100
What color of star is the hottest?
Blue
100
All Stars start off as what?
Nebula
100
What goes along the bottom of the HR diagram?
Temperature
100
What is parallax?
The apparent shift of a star relative to the background stars
200
Which color of star is the coolest?
Red
200
Most stars like our Sun exist in What phase?
Main sequence
200
What goes up the side of the HR diagram?
Brightness or absolute magnitude
200
The unit we use to measure distant stars
Parsec or Light year
300
What are the 2 most common elements in a Star?
Hydrogen and Helium
300
Explain the phases that happen at the end of a low mass star? (after red giant)
Planetary Nebula --> White Dwarf -- Black Dwarf
300
What kind of stars move diagonally across the HR diagram?
Main sequence
300
Calculate the distance of a star that has .5 arcsecond parallax
2 Parsecs
400
What type of stars have a longer lifespan? (Large or Small?)
Small Stars
400
What is nuclear fusion?
Joining two hydrogens to create a helium
400
Explain the characteristics of Blue stars in terms of temperature and brightness
High Temperature and High Brightness
400
Calculate the parallax of a star that is 10 parsecs away
.1 arcseconds of parallax
500
Explain how we can find what element makes up a star?
Match a spectra of elements to spectra of star and see if they line up
500
Name one of the 2 possible ways of how a MASSIVE star will end its life? (After Supernova)
Black Hole or Neutron Star
500
Using the HR diagram, are red giants typically very bright or really dim?
Very bright
500
How does distance to a star effect the parallax we see
further the star the smaller the parallax angle