Black holes
-
Upload
kumar -
Category
Technology
-
view
156 -
download
1
Transcript of Black holes
Black Holes
Black HolesThe intense gravitational field left when a giant star collapses
It is called a black hole because not even light can escape
Photon Sphere
The outer edge where light bends but is still escapable
Event HorizonThe point at which no light can escape
SingularityThe shrunken star too small to be measured but with indefinite density
Galaxies
GalaxyA large assembly of stars and nebulae
Group of Galaxies
The Milky WayOur galaxyFlat disk with spiral arms
Three Types of Galaxies
EllipticalOval shapedMost common type of galaxy found
Contains little gas and dustMost are dim and difficult to see
Spiral Dense center with spiral armsBright and easy to see
Contains large amounts of gas and dust – always producing new stars
IrregularNo specific shapeContains large amounts of gas and dust
Small and faint therefore hard to see
Quasars
QuasarsSmall, powerful source of energy thought to be cores of distant spiral galaxies
They emit radio waves and bright light
This powerpoint was kindly donated to www.worldofteaching.com
http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.