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

3

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

5

TYPES OF STARS IN OUR GALAXY

9% White Dwarfs 1%

Giants

4% Hot, Blue

7% Yellow/White

HealthyStabl

e

79%

Cool

Red

6

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

7

Orion

< Giant

< Giant

Giant >

< Giant

< Hot Bluish + Giant (Double star)

< Giant

Giant >

9

Triangle

< Giant

< Giant

< Yellow: Giant + Blue: Hot Bluish (Double star - Albireo)

< Giant

< Hot Bluish

< Giant

Giant >

< Hot Bluish

Giant

Hot Bluish >

11

Big Dipper& PolarisBig Dipper & Polaris

< Giant

< Mizar & Alcor: Both are Hot Bluish

Polaris: Giant >

Hot Bluish >

< Hot Bluish

Hot Bluish >

< Hot Bluish

Hot Bluish >

13

Cassiopeia

< Giant<

Giant

Giant >

< Giant

< Hot BluishSun-like Star >

15

Cetus

Tau Ceti >

17

Kepler Search Area

100,000 stars for four years!

Vega

Deneb

Altair