Show:
CLASSIFYING STARS
BRIGHTNESS
MEASURING DISTANCES
Hertzsprung-Russell Diagram
100
Imaginary patterns of stars
What is constellation
100
The two types of brightness
What is Apparent and absolute
100
A trip to this star would take 4.2 years
What is Proxima Centauri
100
The graph astronomers use today is called?
What is Hertzsprung-Russell Diagram
200
The five classifications of stars
What is Brightness, temperature, color, size, composition
200
This depends on the stars size and color
What is brightness
200
This is the name of the measurement to measure distances between the stars.
What is Light-year
200
These two point were plotted on the graph
What is Absolute brightness and surface temperature
300
The largest stars in the solar system are known as
What is giant star (supergiant)
300
This star is very hot and gives off a lot of light
What is Rigel
300
The apparent movement of a star when seen from a different position is called?
What is a parallax
300
H-R diagrams are used by astronomers for what purpose?
What is to classify stars and to understand how stars change over time.
400
73% hydrogen, 25% hellium, and 2% other
What is composition of star
400
This type of brightness is its brightness as seen from Earth
What is apparent brightness
400
In a light-year, light travels how far in one year?
What is 9.5 million million kilometers
400
The two scientist who came up with the diagram
What is Ejnar Hertzsprung and Henry Norris Russell
500
The name for the brightest star on Orion's shoulder
What is Betelgeuse
500
This type of brightness is the brightness the star would have if it were at a standard distance from Earth.
What is absolute
500
Who uses parallax to measure the distances to nearby stars
What is astronomers
500
90% of the stars, including the sun, are known as?
What is main sequence stars