Download Physical properties of stars

Physical properties of stars
Magnitude- the brightness of a star
Absolute magnitude depends on:
 The size of the star
 The temperature of the star
Apparent magnitude depends on:
 The size of the star
 The temperature of the star
 The distance of the star
Pg. 444 scale of objects and their
apparent magnitude.
Absolute motion- the actual motion of
stars in space.
Apparent motion- the motion of stars as
seen from Earth.
Size:
The size ranges from stars
approximately 10 km across to stars
that are 1,000 times larger than our
sun. pg. 450
Temperature:
Surface temperatures range from 3000K
to 30,000K
Color is an indication of temperature.
Blue hottest
White
Yellow
Orange
Red coolest
Mass
While the size of stars varies widely the
mass does not. 15 times our Sun’s mass
to .2 times our Sun’s mass
Too little mass-failed star (Brown dwarf)
Too much mass- Blue Giants that fuse
their fuel at incredible rates and have
short lived lives.
Pg 460 diagram of stellar masses
Chemical Composition:
Primarily hydrogen and helium
Trace amounts of other elements
Nuclear fusion is the source of energy
for all stars.