astrophysics

What 2 factors affect gravitational field strength

Mass of planet, distance from centre of planet

What does total energy =

Kinetic energy + gpe

When comet is closer to the sun, which energy is more

ke is more, gpe is less

What comes is further from the sun, which is more and which is less energy

Gpe is more, ke is less

Definition of a universe

Billions of galaxies

Definitions of a galaxy

Billions of stars

What is the acronym for naming the planets

My very easy method just speeds up naming

Which colour is for cool and which is for hot

Red is cool, blue is hot

What is the starting cycle all stars go through

Nebula, collapses into protostar, increases in mass and temp until fusion turning into a main sequence star

How are main sequence stars like the sun stable

Outward radiation balances inward gravity

What is the sequence for low mass stars

Main sequence to red giant to white dwarf

What is the second sequence for larger mass planets

Main sequence to red super giant to supernova explosion to either neutron star or black hole