Your SlideShare is downloading. ×
0
Putting order to billions of stars Classifying Stars
Size <ul><li>Astronomers use 4 sizes for the stars.  The largest stars in the universe are called  super giants .  The sta...
Temperature <ul><li>Temperature of stars can be estimated from earth using the  color  of the star. A star that is  red  i...
Brightness <ul><li>By definition, brightness is the amount of  light  given off.  Brightness depends on the star’s  distan...
How did stars get there? Lives of Stars
Red Giant or Supergiant Protostar Nebula Supernova Black Hole White Dwarf Black Dwarf Neutron Star
Birth <ul><li>All stars, before they are formed, begin as part of a  nebula  (a large collection of gas and dust in an are...
Lifetime <ul><li>How long a star will last depends on its  mass .  Big  stars with large mass, will burn up  very  rapidly...
Death <ul><li>Stars do eventually burn out or die when they  run out  of fuel.  But the size of the star determines how th...
Death continued <ul><li>Small  and  medium  stars have less violent deaths.  The outer layers  expand  and drift away from...
Death continued <ul><li>Super giant  stars are considerably more violent.  When their fuel runs out, these stars explode i...
Death continued <ul><li>The most  massive  stars follow a slightly different path.  They exploded into a supernova much li...
Red Giant or Supergiant Protostar Nebula Supernova Black Hole White Dwarf Black Dwarf Neutron Star
There’s more out there than our Milky Way Galaxies
Side View Top View Sun’s Location About 100,000 light-years
Spiral <ul><li>Spiral galaxies consists of twin  spirals  that slowly rotate.  The arms appear to rotate  and spiral outwa...
Elliptical <ul><li>Elliptical galaxies are  oval  or look like a football.  These galaxies contain  very little  gas and d...
Irregular <ul><li>Irregular galaxies are very diverse.  There are no  regular  shapes or patterns to these galaxies. The L...
Upcoming SlideShare
Loading in...5
×

Stars concept map_notes2_2

1,377

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
1,377
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
106
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Transcript of "Stars concept map_notes2_2"

  1. 1. Putting order to billions of stars Classifying Stars
  2. 2. Size <ul><li>Astronomers use 4 sizes for the stars. The largest stars in the universe are called super giants . The star Betelgeuse is a super giant star. The next step down in size are called medium stars. The star in our solar system, Sun, is a medium star. White dwarf stars about the size of Earth, and neutron stars are the smallest at about 20km in diameter. </li></ul>
  3. 3. Temperature <ul><li>Temperature of stars can be estimated from earth using the color of the star. A star that is red is cool in temperature, around 3,200 ° C . White stars are considered hot at about 5,500 ° C . Blue colored stars are the hottest with temperatures of 10,000 ° C or more . </li></ul>
  4. 4. Brightness <ul><li>By definition, brightness is the amount of light given off. Brightness depends on the star’s distance from Earth as well as its actual brightness . Brightness is measured by two methods: absolute magnitude which is difficult, and apparent magnitude which is easier. Absolute magnitude involves mathematically moving the stars to the same distance from earth and then rating how bright they are. Apparent magnitude is comparing from earth, the visual brightness of one star to another’s brightness. </li></ul>
  5. 5. How did stars get there? Lives of Stars
  6. 6. Red Giant or Supergiant Protostar Nebula Supernova Black Hole White Dwarf Black Dwarf Neutron Star
  7. 7. Birth <ul><li>All stars, before they are formed, begin as part of a nebula (a large collection of gas and dust in an area). As more and more matter collects in the area, gravity begins to pull together the dust and gas which creates a protostar. This protostar continues to form until nuclear fusion begins. Once this happens, a star is born. </li></ul>
  8. 8. Lifetime <ul><li>How long a star will last depends on its mass . Big stars with large mass, will burn up very rapidly and have a short life. Small stars with small mass have a long life because they burn up their fuel slowly . It is a lot like fuel efficiency of vehicles, larger vehicles like suburbans and big trucks take more gas to move than the smaller cars like minis and civics. </li></ul>
  9. 9. Death <ul><li>Stars do eventually burn out or die when they run out of fuel. But the size of the star determines how the star will die. </li></ul>
  10. 10. Death continued <ul><li>Small and medium stars have less violent deaths. The outer layers expand and drift away from the center. The core is left behind, which forms a white dwarf star. The white dwarf then simply stops glowing , and is called a black dwarf. </li></ul>
  11. 11. Death continued <ul><li>Super giant stars are considerably more violent. When their fuel runs out, these stars explode in what’s called a supernova . The material that is left behind and not scattered too far can reform into a neutron star. </li></ul>
  12. 12. Death continued <ul><li>The most massive stars follow a slightly different path. They exploded into a supernova much like the supergiant stars, but the leftover gases do not reform neutron stars. The incredible explosion creates such a huge force that these gases are pulled inward . Gravity becomes so strong so quickly that everything begins to be drawn in and a black hole forms. </li></ul>
  13. 13. Red Giant or Supergiant Protostar Nebula Supernova Black Hole White Dwarf Black Dwarf Neutron Star
  14. 14. There’s more out there than our Milky Way Galaxies
  15. 15. Side View Top View Sun’s Location About 100,000 light-years
  16. 16. Spiral <ul><li>Spiral galaxies consists of twin spirals that slowly rotate. The arms appear to rotate and spiral outward due to its rotation. Spiral galaxies contain lots of dust , and particles . therefore astronomers watch these types of galaxies for new stars to form. Earth is located in a spiral galaxy called the Milky Way. </li></ul>
  17. 17. Elliptical <ul><li>Elliptical galaxies are oval or look like a football. These galaxies contain very little gas and dust. Astronomers watch elliptical galaxies for black dwarfs or supernovas, since most of the stars here are old stars. </li></ul>
  18. 18. Irregular <ul><li>Irregular galaxies are very diverse. There are no regular shapes or patterns to these galaxies. The Large Magellanic Cloud is the name of the closest galaxy to us in space. </li></ul>
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×