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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