Galileo
What equipment did Galileo use to study the stars?
telescope
How are Caroline Herschel & William Herschel related?
What was Henrietta Leavitt studying in 1912?
the Small Magellanic Cloud
Whose work did Harlow Shapley use to inform his own work?
Henrietta Leavitt
What is the diameter of the Milky Way?
over 80.000 lightyears
Galileo discovered that the milky circle in the sky was made up of...
stars!
The Herschels decided to create a map of...
the galaxy
What was Henrietta Leavitt looking for?
changes in the stars
What did Harlow Shapley discover about the size of our galaxy?
it is very large
How many stars are there in the Milky Way galaxy?
more than 100 billion stars
T/F: About half of what you can see in the night sky is our galaxy & the other half is the Sombrero galaxy.
False!
When counting stars, how many directions did they use?
683
T/F: The brightest stars move the slowest.
true!
the distance between the stars
What is the shape/type of the Milky Way galaxy?
spiral galaxy
What blocks light, preventing us from seeing very far in space?
Interstellar dust
The Herschels thought that this was in the middle of our galaxy.
The Sun
She concluded that there is a relationship between the distance of the star from Earth & the star's...
luminosity
Harlow Shapley discovered that the center of our galaxy is close to...
the constellation Sagittarius
What did ancient Greeks call the galaxy?
The milky circle