stars and galaxies Flashcards
blue/ white stars
hot and young
yellow stars
warm and middle age
red stars
cool and old
what is the difference between apparent and absolute magnitude
apparent is the amount of light received on earth and absolute is the actual amount
what do constellations help with
navigation, direction
what is nebula made of
gas and dust
how does mass affect life cycle of star
because it determines whether it will be high or low mass
what is the life cycle of low mass
nebula, protostar, main sequence, red giant, planetary nebula, white dwarf, black dwarf
what is the life cycle of high mass
nebula, protostar, main sequence, red super giant supernova to either neutron or black hole
what does high and low mass cycles share
nebula, protostar, main sequence
what happens during a planetary nebula
outer layers of the star start to break away the core is hot and luminous
what happens during a supernova
core becomes so heavy that it cannot withstand its own gravitational force it explodes on itself
how long is low mass in main sequence
10 billion
how long is high mass in main sequence
20 million
can the dust from a supernova become part of nebula
yes
what are the four types of galaxies
elliptical, spiral, barred spiral, irregular
how do irregular galaxies form
when two galaxies collide
