astrophysics

Question 1

whats a universe

Answer 1

a large collection of billions of galaxy’s

Question 2

whats a galaxy

Answer 2

large collection of billions of stars

Question 3

what galaxy contains our solar systems

Answer 3

the milky way

Question 4

what does the gravitational field strength around an object depend on

Answer 4

the mass of the object and the distance from the object

Question 5

what are comets

Answer 5

huge balls of grit and ice

Question 6

what do moons orbit

Answer 6

moons orbits planets

Question 7

what do planets orbit

Answer 7

planets orbit the sun

Question 8

what do artificial satellites orbit

Answer 8

artificial satellites orbit the earth

Question 9

what to comets orbit

Answer 9

comets orbit the sun

Question 10

artificial satellites can be used to do what

Answer 10

send information to places far away
monitors weather, forest fires etc
observe universe without the earths atmosphere distorting the image

Question 11

what shapes of orbit are moons comets and moons

Answer 11

elliptical

Question 12

what are the stages of the evolution of the stars

Answer 12

nebula
star main sequence
red giant
white dwarf

Question 13

what is a nebula

Answer 13

large gas cloud and small pieces of dust

nuclear reactions take place and a protostar is formed

Question 14

what is the main sequence star

Answer 14

a star will spend around 90% of its lifetime as a main sequence star
90%of the universe is sequence stars
star that is fusing hydrogen in its core

Question 15

if the temperature is between 50000-28000. what is the colour if you wanted to find out about what star it is?

Answer 15

blue

Question 16

if the temperature was between 28000-10000.what is the colour if you wanted to find out about what star it is?

Answer 16

blue-white

Question 17

if the temperature is between 10000-7500.what is the colour if you wanted to find out about what star it is?

Answer 17

white

Question 18

if the temperature is between 7500-6000.what is the colour if you wanted to find out about what star it is?

Answer 18

white yellow

Question 19

if the temperature is between 6000-4900. what is the colour if you wanted to find out about what star it is?

Answer 19

yellow

Question 20

if the temperature is between 4900-3500. what is the colour if you wanted to find out about what star it is?

Answer 20

orange

Question 21

if the temperature is between 3500-2000. what is the colour if you wanted to find out about what star it is?

Answer 21

red

Question 22

what is the evolution the stars with a nebula less than 4 times heavier than our sun?

Answer 22

nebula of mass
main sequence star
red giant
white dwarf

Question 23

what is the evolution of stars with a nebula more than 4 times heavier than our sun? (but less than 25 times heavier)

Answer 23

nebula of mass
main sequence star
red giant/red supergiant
supernova
neutron star

Question 24

what is the evolution of stars with a nebula more than 25 times heavier than our sun?

Answer 24

nebula of mass
main sequence star
red supergiant
supernova
black hole

Question 25

what is a red giant?

Answer 25

star expands as hydrogen fuel runs out, outer layer cools and is no longer white or yellow, but hot red.

Question 26

what is a white dwarf?

Answer 26

star shrinks until it is very small and dense, shining with a white light.