Stars
Where does the sun fall on the H-R diagram?
Main Sequence
Where do we live in the Milky Way?
Near the edge
Is the universe contracting or expanding?
Expanding
All of space and everything in it.
The Universe
About 90% of stars fall on this part of the H-R diagram.
Main sequence
What is the name of the diagram we use to classify stars?
Hertzsprung-Russell diagram
Where are new stars formed in a spiral galaxy?
In the arms
How many years ago did the universe begin?
13.7 billion
A continuous band diagonally across the middle of the diagram; luminosity increases as temperature increases
Main sequence
On the H-R diagram which axis does temperature go on, and which axis does luminosity go on?
Temperature = x-axis
Luminosity = y=axis
What elements are stars mainly composed of?
Hydrogen and Helium
What type of galaxy is the Milky Way? (specific)
Barred Spiral
What color do things look the further away they are from Earth?
Red
Stars near the bottom of the diagram; moderately hot stars with low mass and not very luminous.
White dwarf
Using the H-R diagram, what category would this star fall into?
Temperature 6,381K
Luminosity 102
Red Giants
Explain how a star's mass affects its life cycle.
More mass = shorter life
Less mass = longer life
What is the bright center part of a spiral galaxy?
The galactic bulge
What is the leftover glow from the Big Bang called?
Cosmic Microwave Background
When lightwaves get stretches out and become longer due to the expansion of the universe and stars/galaxies moving away from us.
Redshift
FALSE
Describe (in order) the life cycle of an average star. (hint: there are 5 stages)
Begins as a stellar nebula, then becomes an average star, then a red giant, then forms a planetary nebula, then ends as a white dwarf
What characteristics are used to classify galaxies?
Structure and star arrangement
What is an example of blueshift?
Andromeda heading towards the Milky Way
The phenomenon in which sounds or light from a moving object changes frequency or wavelength in relation to a stationary observer.
The Doppler effect
Using the H-R diagram, what is the name of the star that is the coolest and dimmest?
Van Maanen's Star