Expanding the universe Flashcards
What are stars made of
hydrogen and helium
how do stars produce their own heat and light
through nucellar reactions
What is the name of the galaxy that we live in
Milky way
What is the life cycle of the sun
10 billon years
What is the first life stage of a star?
Prostars
When will a protostar be considered a main sequence star?
(How does a prostar level up to a sequence star)
when the gases and dust release huge amounts of energy
What is the longest stage of the stellar life cycle
main sequence star
Around how long will it take for a star to run out of hydrogen fuel
around a billion years
After losing hydrogen fuel a star can become a
red giant supernova
What does a red giant supernova leave behind
a neutron star
if the red giant supernova can not become a neutron star, once is starts to slowly lose mass it can become a
white dwarf
How are black holes made from neuron stars
due to the density of the neutron star, the gravity can cause it to collapse on itself
What gave black holes their name
due to their gravity being so great that even light can not escape from them
How are galaxies held together
gravity
How are galaxies classified
by shape
What are the 4 different type of galaxies
barred spiral, elliptical, irregular and spiral
What type of galaxy is the milky way
Spiral
Why are spiral galaxies given its name
due to the way its dense circular center with arms spiraling out from the core
the milky way is known as part of a group of galaxies called
The Local Group
what is cosmologists
those who study the origin, properties and evolution of the universe
What is the big bang theory
exploded and caused all of this compacted material to be flung outward, accounting for the still expanding universe
