Show:
Structure of the Universe
Stars
Life Cycles of Stars 1
Life Cycles of Stars 2
H-R Diagrams
100
What includes space and all the matter and energy in it?
The universe
100
What is a large celestial body that is composed of gas and emits light?
Star
100
Where are stars formed?
Nebula (dense cores)
100
What is the hot, dense core of matter that remains from the collapse of a low-mass star?
White dwarf
100
Where are the hottest stars shown on an H-R diagram?
The left
200
What is a collection of large and small bodies that orbit a central star?
Solar system
200
What is the measure of a star's brightness as seen from Earth called?
Apparent magnitude
200
In what stage do stars spend most of their lives?
Active fusion stage
200
What is the gigantic explosion in which a high-mass star throws its outer layers into space?
Supernova
200
Where are the brightest stars located on an H-R diagram?
The top
300
What is a spherical body that orbits a star?
Planet
300
What is it called when three or more stars are bound together by gravity?
Multiple star system (multiple stars)
300
What mass-type of star ends its life as a white dwarf?
A low-mass star
300
What is a small, incredibly dense ball of closely packed neutrons?
Neutron star
300
Where are the coolest stars located on an H-R diagram?
The right side
400
What is a large collection of stars, gas, and dust that is held together by gravity?
Galaxy
400
What is a measure of how bright a star would be if it were seen from a standard distance?
Absolute magnitude
400
What are neutron stars that emit a beam of electromagnetic radiation?
Pulsar
400
What is an invisible object with gravity so great that nothing can escape it?
Black hole
400
Where are the dimmest stars located on an H-R diagram?
The bottom
500
What is the distance that light travels through space in 1 year called?
Light-year
500
What is an object whose color depends only on temperature called?
Blackbody
500
What is a graph that shows the relationship between a star's surface temperature and absolute magnitude?
H-R diagram
500
What mass-type of star might end its life as a neutron star?
A high-mass star
500
What is the region of the diagram where stars spend most of their lives?
Main sequence