Show:
Star Basics
H-R Diagram
Shining Stars
Random star factoids
Star size
100
A collection of billions of stars
What is a galaxy?
100
Most stars in the universe are this type
What is main sequence?
100
another name for a star's brightness
What is magnitude?
100
The energy emitted by a star is in the form of this
What is electromagnetic radiation
100
This size star will have the shortest life spans
What are giants and supergiants?
200
The types of E-M radiation emitted by stars
What is radio-, micro-, infra-red, visible light, U-V, X-rays, Gamma rays?
200
This group of stars is very bright but not hot--upper right
What are the red giants?
200
The term for a star's brightness if it were a standard distance from earth
What is absolute magnitude?
200
This is the color the hottest stars will glow at ( 25,000 degrees C)
What is blue
200
The size of our sun
What is medium?
300
A unit of measurement in astronomy related to the distance light travels in a year
What is a light year
300
This group of stars is very hot but not very bright- lower left
What are the white dwarfs?
300
The measure of a star's brightness as seen from earth
What is apparent magnitude
300
The lowest temperature stars appear to be this color
What is red
300
Small dense stars about the size of earth
What is a white dwarf?
400
All of space and everything in it
What is the universe?
400
The 4 things that the HR-diagram can show
brightness, temperature, color, size
400
This can measure the chemical composition and temperature of stars
What is the spectroscope?
400
Temperature affects the color of a star and also this variable
What is brightness
400
Stars that are up to 1000 solar radii are called this
What are supergiants?
500
The majority of a star's composition these two elements
What is hydrogen and helium
500
As a main sequence star's temperature decreases its brightness does this.
What is decreases
500
A diagram that plots the temperature of a star compared to its brightness
What is the Hertzsprung-Russell diagram?
500
The closest star to earth after the sun and its distance.
What is Proxima Centauri at 4.2 light years?
500
The smallest, densest stars are called this
What is a neutron star?