 Stars can be classified in three ways:
 Size – How massive the star is
 Temperature – A star’s color reveals its
tempe...
 How bright a star looks from Earth depends
upon both how far the star is from Earth and
how bright the star actually is....
 Apparent magnitude is the brightness of a
star as seen from Earth.
 Absolute magnitude is brightness of a star as
if it...
 An HR diagram shows the two most
important characteristics of stars, which are
temperature and absolute magnitude
(brigh...
 An HR diagram shows the two most
important characteristics of stars, which are
temperature and absolute magnitude
(brigh...
H r diagram
Upcoming SlideShare
Loading in …5
×

H r diagram

6,955 views

Published on

Published in: Education
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
6,955
On SlideShare
0
From Embeds
0
Number of Embeds
5,621
Actions
Shares
0
Downloads
8
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

H r diagram

  1. 1.  Stars can be classified in three ways:  Size – How massive the star is  Temperature – A star’s color reveals its temperature. ▪ Red stars have a cooler temperature, and blue stars have a warmer temperature.  Brightness/Magnitude – The amount of light a star gives off depends on its size and temperature.
  2. 2.  How bright a star looks from Earth depends upon both how far the star is from Earth and how bright the star actually is.  A star’s brightness can be can be described in two ways: apparent magnitude and absolute magnitude.
  3. 3.  Apparent magnitude is the brightness of a star as seen from Earth.  Absolute magnitude is brightness of a star as if it were 32.6 light years from Earth.  The brightness of the stars is compared to the brightness of our Sun. We call this luminosity.
  4. 4.  An HR diagram shows the two most important characteristics of stars, which are temperature and absolute magnitude (brightness) and/or luminosity.  Scientists plot the surface temperatures of stars and their brightness on a graph.
  5. 5.  An HR diagram shows the two most important characteristics of stars, which are temperature and absolute magnitude (brightness) and/or luminosity.  Scientists plot the surface temperatures of stars and their brightness on a graph.

×