police
Learning Target
1
2
3
4
Why are stars different colors?
How can scientists learn what stars are made of?
How can we measure the distance between stars?
Why do stars seem to move across the sky?
Follow along in your workbook notes.
=videos to watch
p. 365
p. 365
p. 366
p. 366
p. 366-367
TEMPERATURE
L
U
M
I
N
O
S
I
T
Y
p. 368
 Sirius?
 Betelgeuse?
 The
Sun?
 Polaris?
 -A
constellation is a group of stars that
appear to be next to each other in space.
 -When the stars are connected, they
resemble figures or things.
 -For centuries, people thought the position
of the moon or planets in these
constellations at the time of your birth
determined your fate (Astrology)
 Examples of constellations include the
following…
Stars that are seen all year long
Constellations 101
Will Polaris
always be
the North
Star?
Does it look
like a
dipper from
anywhere in
space?
p. 368-369
 Light
Year – the distance light travels in 1 year
 It is equal to about 6 trillion miles!
 The
next closest star, Proxima Centauri, is
4.2 light years away.
 Sirius
is 8.6 light years away.
 Parsec—say
 But

what?! (3.26 light years)
how do we measure the distance to a star?
Parallax
p. 370
1 How do stars change over time?
2 What is an H-R diagram?
3 What may a star become after a supernova?
Follow along in your workbook notes.
Reread each page and answer questions on those pages as you go
through this powerpoint.
=videos to watch
p. 371-372
p. 372-374
p. 374-375
 -Cloud
of gas and
dust
 -Mostly hydrogen
 -Shockwaves from
the outside force
the cloud to
condense to start
a star forming
 -early
stars that
have just begun to
condense
(compact
together)
 Normal
 Massive
 -average,
 -middle-aged
middleaged star like the
Sun
star,
but very heavy
 -bright
stars that
are 10 to 100
times larger than
the Sun
 -form when much
of the smaller
atoms have been
fused
 -bright
star this
usually well over
100 times greater
than the Sun
 -go through fusion
fast! (millions of
years)

 -forms
when the
outer gases of a
giant dissipate in a
halo shape
 -likely to condense
somewhere as a
new planet
 -the
sudden
collapse of a
supergiant that
lasts just a few
moments
 -million times
brighter than
normal
 -the
left over
glowing core of a
giant star
 -the fate of our
Sun
 -the

VERY VERY
dense leftover
core of a
supergiant that
exploded
(supernova)
p. 376
Are you ready for a quiz
next class?