h-r diagram
Whats the h-r diagram used for?
summarise the evolution of stars or to study the properties and collections of stars
What kind of galaxy is the milky way?
Spiral galaxy
Whats the nebula stage of a star?
the start of its life
whats the photosphere
lowest layer of the suns atmosphere
whats the name of our galaxy
milky way
temperature and size
What's the closest galaxy to the milky way?
Andromeda
how are stars classified?
their physical looks like color, mass, light
whats the chromosphere
layer of the suns atmosphere above the photosphere
how old is our solar system
4.5 billion years
Whats the full name of the h-r diagram
Hertzsprung Russell diagram
Whats a galaxy that doesn't have a particular shape called?
Irregular galaxy
biggest kind of star?
supergiants
outer, largest layer of the suns atmosphere
what is the coolest type of star
red stars
Why do we use the h-r diagram?
it gives valuable information about the stars
what are galaxies made of?
dust,gas,dark matter
What are stars made of?
hydrogen and helium
what is a sunspot?
areas on the sun that are less bright and cooler
whats the hottest type of star
blue stars
Who made the h-r diagram?
astronomer Ejnar Hertzsprung
how many stars are usually in a galaxy?
1 billion
what determines a stars color
how old is the sun
4.603 billion years
what is the "big bang theory"?
12 to 15 billion years ago the universe began with a huge fiery explosion