Big Bang!
How many stars are there in our solar system?
one
nebula
brown dwarf
The explosion of a massive star results in this.
supernova explosion
What is the full name of the H-R diagram?
Hertzsprung - Russell diagram
What is the name of the galaxy to which our sun belongs.
the milky way
The source of heat generated in a star's core is this.
Fusion
A star that is balancing the opposing forces of gravity and heat expansion is called this.
a main sequence star
The outer layers of a star that are blown away as the star dies forms what is called this.
planetary nebula
Cooler stars are on which side of the H-R diagram (top, bottom, left, or right)
left
A group of billions of stars held near each other by the force of gravity is called _____ .
a galaxy
The hottest stars are this color.
blue
The type of star with the longest life -span is this.
red dwarf
black hole
The H-R diagram shows us that the color of a star is an indication of this.
the surface temperature of the star
The age of the universe is approximately how many years old?
14-15 billion years
Which stars have longer life spans - small ones or large ones?
small ones
A star that is so massive that gravity squezes it to the size of a small city (like Huntington) is called this.
A neutron star
The brightness of a star as it appears from the earth is called ___ .
apparent brightness
Compared to our sun, the luminosity of a white dwarf is (greater / lower).
lower
The age of our sun is approximately how many years old?
5 billion years
Where are all elements heavier than oxygen formed?
supernova explosions
A rapidly rotating neutron star that radiates electromagnetic radiation from its poles is called this.
pulsar
The total amount of energy that is given off from the surface of a star per second is called this.
luminosity
The type of star that is relatively cool but highly luminous is ____ .
red (super)giant