Show:
astronamers
constalation
stars
H-R
black hole
100
Tempature, color, size, and chemical composition
How do astronamers classify stars ?
100
a large cloud of gas and dust spread out in a immense volume
What is a nebula
100
the use a device called the light-year
how do astronamers measure distances to stars
100
Very large stars are called giant stars or super giant stars. Small stars are called white dwarfs. the smallest stars are called neutron.
How do astronamers classify stars using size
100
the chemical composition of most stars are about 73 percent hydrogen, 25 percent helium, and 2 percent other elements by mass.
how do asronamers classify stars by using chemical composition
200
A contracting cloud of gas and dustwith anough force to form a star
What is a prostar
200
when the contracting gas and dust from a neubla become so dense and hot that nuclear fusion starts
how is a star born
300
most of the stars in the H-R diagram form a diagonal area
What is main sequence
300
paralex
What do astronamers also use to measure distances to stars
300
At night there is a slight difference in color
How do scientist classify stars by color ?
300
brightness as seen from earth
what is apparent brightness
300
the hotter stars are blue and cooler stars are red
how do astronamers classify stars using temperature
400
the apparant change in position of an object when you look at it from certain distances
What is a paraparallax
400
a device that breaks into color and produces and produces an image of resulting
what is a spectograph
400
to classify stars and to understand how stars change overtime
How do astronamersuse Herzsprung-Russel Diagram
500
brightness the star would have if it were a standered distance from earth
What is absolute brightness
500
the distance that light travels in one year, 9.5 million million travels
What is a light-year
500
it depends on the size and temperature
how is a stars brightnes determined