Stars and Planets

Question 1

Measurements in space

Answer 1

Sun is 150 million kilometres from the Earth
Light-year

Question 2

Light-years

Answer 2

Distance light travels in a year. Light travels 300,000 km per second and takes 8 mins to reach us from the Sun.

Question 3

Astronomical unit (AU)

Answer 3

Mean average distance from Earth to the Sun is 1AU
1 AU= 1.5x10^11m

Question 4

Solar system data

Answer 4

Mercury 0.4
Venus 0.7
Earth 1.0
Mars 1.5
Jupiter 5.2
Saturn 9.6
Uranus 19
Neptune 30

Question 5

Life cycle of stars

Answer 5

Nebula -> Protostar -> Main sequence star-> Red giant-> White dwarf-> Supernova-> Neutron star -> Blacl hole

Question 6

Hertzsprung-Russell Diagram

Answer 6

2 astronimers that produced a diagram showing the relationship between a stars temp and luminosity
Diagonal band called the main sequence which is where the stars with a range of temp and luminosity
Cooler but brighter stars appear as giants towards the top right while hotter but dimmer stars appear as dwarfs in the bottom left