Show:
Classify stars
Characteristics
Color and Mass
stages of stars
lives of stars
100
The sun is classified as a __________
star
100
What is parallax?
The apparent change in position of an object when viewed from different place.
100
What color are the "cooler stars"
reddish
100
What is a protostar?
early stage of life of a star before nuclear fusion begins.
100
What factor determines how long a star lives?
mass
200
Name three characteristics to classify stars
color temperature size mass composition brightness
200
What is a light year?
The distance light travels through space in one year.
200
What color are the hottest stars
blue
200
What is a nebula?
a cloud of gas and dust with great volume
200

Average stars become what kind of stars? 

Red Giant 

300
What is the difference between apparent brightness and absolute brightness.
Apparent: How bright a star appears to be as seen from Earth Absolute: The brightness a star would have if it were at a standard distance to Earth
300

What is a galaxy?

cluster of stars, gas, and dust bound together by gravity

300
Fill in the blanks In general Hotter stars have a _________ brightness In general Bigger stars have a __________ brightness
high high
300

what is a supernova

an explosion that occurs when a massive star dies

300

massive stars become what? 

Super giant stars

400
What are two ways astronomers can use an H-R diagram for?
To classify stars understand how stars change over time
400

All of space and everything in it

what is the universe

400
Star Nikhil is a very HOT star and has a blue color, however does now have the highest absolute brightness. What can you infer about Star Nikhil?
small star
400
Why do bigger stars live shorter lives than smaller stars?
They burn their fuel faster.
400
What is a black hole? What does it result from?
intense body of gravity, a supernova exploding star
500
What two charactersitics are shown IN An H-R diagram?
Surface temperature of a star and absolute brightness.
500

the location on the HR diagram where most stars lie (hint our sun is one of them) 

Main sequence 

500
Star Catalina is a "cooler star" (reddish) but has a very high absolute brightness. What can you infer about Star Catalina?
It is very big
500
What is a white dwarf and what type of star does it result from?
the blue-white core from a red giant, results from alow mass star.
500
What is a neutron star? What does it result from
remains of high mass stars from the explosion