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Chapters 10 and 11 The Sun & the Characterizing Stars. “We are star stuff”. - Carl Sagan. Kelvin Temperature Scale. Kelvin Temperature = _______ Temperature + _____. The Sun and other stars are huge and massive!!!. Sunspots. regions of the solar surface that
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“We are star stuff” - Carl Sagan
Kelvin Temperature Scale Kelvin Temperature = _______ Temperature + _____
Sunspots • regions of the solar surface that • is dark and relatively cool • appear dark because they give • off less radiation per unit area • than the photosphere that • surrounds them • can use sunspots to determine • the Sun’s period of rotation
Sunspot Cycle Minimum number Maximum number
Solar magnetic fields also create other atmospheric phenomena
Binary Stars ___________: multiple systems bound by gravity and orbiting each other around their center of mass (___________)
Star Clusters ________________ _____________ • closely packed toward • toward the center • shaped like a ball • all are old stars • 10,000-1,000,000 stars • located in the galactic • halo • loose grouping of stars • irregular shape • composed predominantly of young stars • hundreds of stars • located in the plane of the Milky Way
The orbital motion of binary stars affects the ___________ of their spectral lines
Colors and Temperatures A star’s color reveals its surface ____________
The Spectral Type of Stars • stars are classified by their spectral types: • _____________ to ___________ • ______________ to ____________ • An important sequence to remember: • Oh Be a Fine Guy (or Girl), Kiss Me
Stars are classified by their spectra as O, B, A, F,G, K, and M spectral types