Birth
What happens to a stellar nebula before it turns into a protostar?
it collapses onto itself
What is the second stage in the Life Cycle of a star?
protostar
A black dwarf is black in color because ____
it has no more heat energy
Why would a white dwarf star lose its heat
it looses its heat to space because space is cooler and heat travels from hot to cold.
14 billion years old
What is a stellar nebula?
a giant gas and dust cloud
What determines whether a star becomes a red giant or red supergiant
its mass
What is left of a star after the gas and dust cloud of a planetary nebula goes away?
its core
Heat moves from ____ to _____ areas
hot to cold
Over billions of years, what happens to the core of a white dwarf and what does it turn in to?
It cools off and turns into a black dwarf
What happens to the extra matter around a protostar as it develops.
it is consumed by the star.
When a star turns into a Red giant or Supergiant, what happens to its atmosphere layers?
What is a black hole?
an object whose mass is so great that light cannot escape due to its intense gravity
A neutron star can weigh as much as
2 stars
How fast is the Universe expanding
150 thousand miles per hour
A stellar nebula collapses on itself due to its
huge mass and gravity
As a star turns into a Red giant or Supergiant, what happens to its core?
it shrinks
After a supernova event, a star can become either a _______ or ______.
neutron star or black hole
What is a neutron star?
extremely compact core of a red giant
On average, about how fast does a galaxy spin or rotate?
360 million miles per hour
A stellar nebula heats up because
the force of gravity and friction causes the matter to heat up
What happens to a red giant's atmosphere layers as it turns into a planetary nebula?
they are blown off into space
What is the next stage after a planetary nebula
white dwarf
A white dwarf is white in color because
it is very hot, white hot!
On average, about how fast do galaxies move through the Universe?
about 90 million mph
What is the final step that turns a protostar into an actual “star”?
nuclear fusion in its core
What causes the star to look red?
the stars rapid expansion and cooling
When a red supergiant goes supernova, its atmosphere layers _____
collapse onto the core
Over billions of years, what has the core of a star done?
created new elements
What is the name of the galaxy we live in
Milky Way