A Review of Magnetic Activity in Sun-like stars Magnetic Stars Seminar Oct. 30, 2002.
Where are the Stars like our Sun?
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Transcript of Where are the Stars like our Sun?
1
Where are the Stars like our Sun?
Are all the stars we see in the night sky like our Sun?
2
TYPES OF STARS IN OUR GALAXY
90% HealthyStabl
e
9% White Dwarfs 1%
Giants
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TYPES OF STARS IN OUR GALAXY
9% White Dwarfs 1%
Giants
HealthyStabl
e Stars
7% Yellow/White
4
TYPES OF STARS IN OUR GALAXY
9% White Dwarfs 1%
Giants
HealthyStabl
e
7% Yellow/White
4% Hot, Blue
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TYPES OF STARS IN OUR GALAXY
9% White Dwarfs 1%
Giants
4% Hot, Blue
7% Yellow/White
HealthyStabl
e
79%
Cool
Red
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But what do we mostly see with just our eyes?
9% White Dwarfs 1%
Giants
4% Hot, Blue
7% Yellow/White
HealthyStabl
e
79%
Cool
Red
We see the
giants
We see the hot, bluish stars
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Orion
< Giant
< Giant
Giant >
< Giant
< Hot Bluish + Giant (Double star)
< Giant
Giant >
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Triangle
< Giant
< Giant
< Yellow: Giant + Blue: Hot Bluish (Double star - Albireo)
< Giant
< Hot Bluish
< Giant
Giant >
< Hot Bluish
Giant
Hot Bluish >
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Big Dipper& PolarisBig Dipper & Polaris
< Giant
< Mizar & Alcor: Both are Hot Bluish
Polaris: Giant >
Hot Bluish >
< Hot Bluish
Hot Bluish >
< Hot Bluish
Hot Bluish >
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Cassiopeia
< Giant<
Giant
Giant >
< Giant
< Hot BluishSun-like Star >
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Cetus
Tau Ceti >
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Kepler Search Area
100,000 stars for four years!
Vega
Deneb
Altair