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30 Cards in this Set
- Front
- Back
Age of the Sun |
4.57billion halfway through its life |
|
mass of the Sun |
1.99*10^30 kg 333000 times the earth |
|
radius of the Sun |
696000km |
|
luminosity of the Sun |
4*1026 watts |
|
magnitude of the Sun |
apparent -26.7 absolute 4.8 |
|
Rotation of the Sun |
25.1 days at the equator 36 days at the poles |
|
How many elements in the Sun |
67 |
|
Two most common elements in the Sun |
Hydrogen and Helium |
|
Temp. of the Sun's core |
15,000,000K |
|
temp. of the Sun's radiation zone |
7,000,000K |
|
Sun's coolest zones |
Photosphere, Chromosphere, and transition zone |
|
Temperature increase in the Sun |
Transition zone |
|
Required for fusion |
temperature higher than 10^7K |
|
Most stable element |
iron Fe |
|
Sunspot cycle length |
22 years |
|
Characteristics of solar minimum |
few sunspots that occur at higher latitudes |
|
characteristics of solar maximum |
lots of sunspots that occur at lower latitudes |
|
Maunder minimum |
1642-1715 |
|
Dalton minimum |
1790-1820 |
|
Nearest star to us besides the Sun |
Proxima Centauri |
|
faintest magnitude we can see with the naked eye |
+6
|
|
temperature of spectral class O |
30,000K |
|
temperature of spectral class B |
20,000K |
|
temperature of spectral class A |
10,000K |
|
temp of spectral class F |
7,000K |
|
temp of spectral class G |
6,000K |
|
temp of spectral class K |
4,000K |
|
temp of spectral class M |
3,000K |
|
characteristic of a neutron stars |
made completely of neutrons |
|
characteristic of pulsars |
fast rotating neutron stars |