What kind of star is that?
Using the HR Diagram and your knowledge of the roman numeral system, figure out
what type of stars are listed.
Remember:
O stars are "blue",
B "blue-white",
A stars "white",
F stars "yellow-white",
G stars "yellow",
K stars "orange",
M stars "red",
I, Ia, Ib = supergiants
II= bright giants
III= giants
IV= sub-giants
V= main sequence
VI= subdwarfs
VII= white dwarfs
Our Sun is a G2V.
Star Name
Betelgeuse
Pollux
Sirius
Aldebaran
Alpha Centauri
Arrakis
Spica
Mintaka
Altair
Antares
Spectral Class
M2Ib
K2III
A1V
K5III
G2V
F7V
B1III
O9II
A7V
M2Ia
Color
Size
Star Name
Betelgeuse
Pollux
Sirius
Aldebaran
Alpha Centauri
Arrakis
Spica
Mintaka
Altair
Antares
Spectral Class
M2Ib
K2III
A1V
K5III
G2V
F7V
B1III
O9II
A7V
M2Ia
Temperature?
Good for life?
After you have filled in the chart, try to predict where those 10 stars are
positioned on the HR Diagram.
How many would be good for life?
Pick one “good for life” star and explain why you think we could live near
that planet.
If we picked a blue or red star to live on, what kind of impact would that
have on our earth lifeforms that are used to light with all the colors of the
rainbow?
What kind of spectral class are you looking for for your new planet home?