astrophysics Flashcards
universe
large collection of billion of galaxies
large collection of billions of galaxies are called?
universe
galaxy
large collection of billion of stars
large collection of billion of stars are called?
galaxy
solar system
collection of planets orbiting a common star. our solar system is in the milky way galaxy
collection of planets orbiting a common star is called?
solar system
weight calculation when gravitational field strength and mass are involved
weight = mass x gravitational field strength
gravitational field strength is measured in?
Newtons per kilogram
who orbits around who?
moon orbits planets
planets orbit sun
moon orbits…
planets
planets orbit…
sun
calculation to work out orbit speed when orbital radius and time period are involved
orbit speed = 2 x pi x orbital radius/time period
stellar evolution
protostar,
star,
red giant star or red giant super star,
white dwarf or supernova,
black dwarf or black hole or neutron star
what causes as star to get bigger?
hydrogen
