stars and astrology

Question 0

hr measured by

Answer 0

x =temp

y= lumosity

Question 1

hr diagram

Answer 1

hertz Russell

Question 2

green band on hr

Answer 2

main sequence
90% of stars life
found top left to lower right

Question 3

dust cloud or nebula

Answer 3

the start of star=beginning of life

mostly hydrogen and 7% helium

Question 4

a kid -star stage

Answer 4

protostar
around a million years after nebula
gravity and temp increase the start of the fusing

Question 5

true star “teen- young adult”

Answer 5

core reaches 15mill degrees Celciu
“start of fusion”
-hydrogen turns to helium

Question 6

adult - main part of stars life

Answer 6

main sequence
90% of life
outward heat pressure balanced by gravity
fuse can last for mills or bills

Question 7

hotter stars are

cooler stars are

Answer 7

hotter blue -short wave lengths

cooler red orange- longer wave lengths like our sun

Question 8

bigger stars
shorter stars
why?

Answer 8

bigger - shorter stars (millons of yrs)

smaller - longer lives (billions of yrs”

Question 9

the forming of a red giant - explain process

Answer 9

once star runs out of elements to fuse to the core begins to contract and gravity loosens-
so outer later expands to 1000x bigger than main sequence

Question 10

stable red giant

Answer 10

once stable outer layer gives off cooler longer wave lengths (red)

Question 11

other elements in

Answer 11

fuses other elements up to iron

becuase if helium core gets hot enough the nuclei will form new elements

Question 12

life after red giant

Answer 12

after iron no fuse
used up fuel
shrinks to white dwarf-dense n glows

Question 13

massive stars (blue)

Answer 13

5-20x mass of sun

very bright cause it’s big

Question 14

red super giant

Answer 14

massive star gets bigger

will end in super nova

Question 15

life after a super nova (massive red super giant explosion)

Answer 15

neutron star - super small super dense and spins extremely fast
or black hole

Question 16

geocentric model

Answer 16

model where sun revolves around earth

Question 17

heliocentric

Answer 17

earth around sun

Question 18

asterism

Answer 18

stars part of a bigger constellations

Question 19

right ascension

Answer 19

⬅️➡️ longitude

Question 20

declination

Answer 20

⬆️⬇️latitude

Question 21

why do we only certain stars on certain seasons

Answer 21

we only see stars opposite of the sun because of how bright the sun is
when earth isn’t faced towards the sun it’s dark(night) and when it is the sun blocks out the sky(day)

Question 22

which star will be our next North Star

why

Answer 22

vega will be new North Star

because the tilt of the earth is determined by a wobble

Question 23

what’s the name of this wobble

Answer 23

precision -the wobble of the axis that cause this In the night sky to change Position to us
takes 26,000yrs

Question 24

1 degree equals

Answer 24

"1 hour" 60secs

Question 25

1' equals

Answer 25

60seconds

Question 26

1" equals

Answer 26

1second -3600" seconds in 1 degree(hour)

Question 27

sun low point | sun hight point

Answer 27

low - winter | high - summer

Question 28

planets follow a what path? | why

Answer 28

ecliptic path | becuase they are all on the same plain revolving around the sun

Question 29

eccentricity explain it

Answer 29

how ecliptic all the orbit of a planet is 0 = circle 1 = almost a line as time goes on the eccentricity of a planet will be greater

Question 30

precession

Answer 30

the wobbling motion of a planet and changes the tilt of axis and chances seasons every 26,000 years

Question 31

keplers 1st law

Answer 31

all planets orbit the sun in a path that resembles a ellipse sun located at center

Question 32

keplers 2nd law

Answer 32

2 imaginary lines drawn from center of sub to planet - think of sweeping model EQUAL ARES IN EQUAL TIMES

Question 33

3rd kepler law

Answer 33

ratio of the squared periods of any 2 planets is equal to the ratio of the cubes of their average distance to the sun

Question 34

p2= a3

Answer 34

3rd law p = years a= au

Question 35

parallax

Answer 35

a way to find distance from star if the object is closer the angle is larger if object is further the angle gets smalle

Question 36

magnitude

Answer 36

brightness of star on a scale were neg = bright (-26 is sun) positive = dim (7)

Question 37

apparent magnitude

Answer 37

the brightness how it appears

Question 38

absolute magnitude

Answer 38

putting stars side by side at 3.62LY away to compare against each other

Question 39

Milky Way

Answer 39

spiral galaxy | 3millon LY across in diameter

Question 40

andromeda galaxy

Answer 40

also spiral closest LARGE galaxy 2.5 millon ly away

Question 41

Magellanic Cloud

Answer 41

closet galaxy to ours a irregular galaxy 200,000 LY across smaller then ours

Question 42

spirals

Answer 42

most galaxies are spirals older stars in center younger within spiraling arms

Question 43

elliptical

Answer 43

takes a spherical shape like a globe far less gas and dust then spirals few new stars form in these

Question 44

irregular

Answer 44

No simple shape lots of dust and gas young stars

Question 45

``` km = to miles miles = to km ```

Answer 45

1. 61miles | 0. 621 km

Question 46

1 mile = feet

Answer 46

5280ft