The Sun Review
__% Carbon atoms in the Sun ___% of total mass
0.043% and 0.40%
__% Oxygen atoms in the Sun ___% of total mass
0.078 and 0.97
What is the SUn's mass?
1.99*10^30 kg
How many earth;s does it take to go acorss the sun?
100
How long is the Sunspot cycle?
11 years
The average density of the Sun
1410 kg/m^3
Convection zone in km
200,000 km
How many kilometers to the sun
200,000 km
How long is the Solar Cycle?
22 years
Sun's rotation period
24.9 days (equator); 29.8 days (poles)
In light-years how big is parsec?
3.3 years
SUn's luminosity
3.86 10^26 Watts
Radiation zone
300,000 km
the Photosphere
500 km
Sun's surface temperature
5780K
What is the temperature of the Sun on the surface?
6000 K
What is the Sun's radius?
696,000 km (100 Earth Radii)
__% Helium atoms in the Sun ___% of total mass
8.7% and 27.1%
___% Hydrogen atoms in the Sun ___% total mass
91.2% and 71%
Definition of a star
A glowing ball of gas held together by its gravity and powered by nuclear fusion.
Mass--_____--______
Binary star system, Kepler's 3rd law
If a main sequence star with a mass less than the Sun what quadrant?
Lower right
Can a white dwarf go nova by itself?
No; has to have binary star
If you want to measure temeprature what law?
Wiens law
How many Earth's would it take to fill up the SUn?
a million
What is the suns lifetime?
about 10 billion years
Whats the core temperature?
around 15 million in the core
Apparent magnitude scale is talking about ?
brightness
If you know luminosity and brightness you can calculate?
distance
What do you get from parallax?
distance
Where is the energy produced in the Sun?(i.e. where is the fusion occurring AND what elements are involved in the fusion process)?
energy is produced at the core from hydrogen and helium
What is the name we use for the state that the size of the defines sun? (2 things)
gravity and gas pressure
• What is it called when 2 forces cancel each other out
hydrostatic equilibrium
What quadrant are white dwarves found in?
lower left
WHats the Chandrasekhar limit
mass difference between a white dwarf and neutron star?
what is the absolute magnitude?
measure of its luminosity
*****What we see and call the 'surface' of the Sun
photosphere
Radial velocity--____--_____
red shift/blue shift, Doppler's Effect
IF you want to measure radiu
stefan boltman
Where on the main sequence would ultimately be Type 2 supernova explosions?
upper left
WHere are red giants found?
upper right