understanding universe

Question 1

appearance of observable universe

Answer 1

The universe is full of structures with things such as galaxies, stars, and solar systems.

Question 2

describe the structure of the universe in terms of stars and galaxies.

Answer 2

stars are luminoius, hot gas which vary in size
galaxies are vast systems containing trillions of stars

Question 3

why is a light year used

Answer 3

distance in space is very large and more convenient to communicate

Question 4

stars relation to gravitational force

Answer 4

for a protostar to be formed, the nebula must undergo gravitational attraction in high density regions. For stars to continue its journey to larger stars, must have gravitational force.

Question 5

galaxy relation to gravity

Answer 5

galaxy exists because gravity pulls the stars together creating a system.

Question 6

life cycle of high mass star

Answer 6

1. nebula
2. protostar
   HIGH MASS
3. red supergiant
4. supernova
5. black hole OR neutron star

Question 7

life cycle of a low mass star

Answer 7

1. nebula
2. protostar
   LOW MASS
3. red giant
4. white dwarf
5. black dwarf