Space Physics

Question 1

what is SS made up of

Answer 1

8 planets
dwarf planets
moons (natural satellites)
asteroids
comets

Question 2

where is SS located

Answer 2

milky way galaxy

Question 3

HOW DOES STAR FORM

Answer 3

1. cloud of dust and gas (nebula) pulled together by gravitational attraction
2. forms protostar
3. as star becomes denser, particles collide more often and so temp increases as more energy is transferred to thermal energy store
4. when temp is high enough nuclear fusion begins
5. becomes main sequence star

Question 4

whats the main gas in a nebula

Answer 4

hydrogen

Question 5

why is a star stable

Answer 5

because the fusion reactions produce outward forces which are in equilibrium to gravitational forces pulling it in

Question 6

life cycle of stars: sunsized

Answer 6

protostar
main sequence star
red giant
white dwarf
black hole

Question 7

life cycle of stars:
much larger than sun

Answer 7

protostar
main sequence
red supergiant
SUPERNOVA
neutron star/blackhole

Question 8

as an object prbits what changes and what stays same

Answer 8

velocity constantly changes
speed stays same

Question 9

whats the name of the resultant force on orbiting body
-where does it act towards

Answer 9

centripetal force
-acts towards bodyits orbiting

Question 10

define red shift

Answer 10

name given to effect that makes wavelengths longer if light source moves away from observer

Question 11

what observations suggest that universe is expanding

Answer 11

further away galaxies are, the moe their light is redshifted

Question 12

what is dark energy

Answer 12

force responsible for acceleration of universe’s expansion

Question 13

define big bang theory

Answer 13

theory for start of universe where universe began as a singularity