Nebula
What is a nebula
A cloud of gas
what is a protostar
A contracting mass of gas which represents an early stage in the formation of a star.
Where does the star spent the most time in its life
The main sequence
What color is the red super giant
Red
what can escape a black hole
nothing, not even light
What is the nickname of a nebula
The nursery
how old is a protostar usually
100,000 to 1 million years
what percent of a stars life is it in main sequence
90%
is the red super giant hotter or cooler that a white dwarf star
Cooler
why cant we see a black hole from earth
Black holes don't emit or reflect light, making them effectively invisible to telescopes
Is a nebula always in motion (True or False)
True
Is a protostar made of hydrogen or helium?
Both
what stage of life is our sun in
The main sequence
What is the stage after the red super giant
Super nova
Are there different types of black holes?
yes, there are 3 different types (stellar-mass, supermassive, and intermediate-mass.)
how does the nebula become a star
As it collapses, pressure from gravity causes the material at the center to heat up, creating a protostar
can fusion take place in a protostar
No, the core is not hot enough
how many years is a star in main sequence
about 20 million years
how long do red supergiants live
From 5 to 20 million years.
what can cause a black hole to form
when the center of a very massive star collapses in upon itself.
About how long does a nebula last
about 20,000 years
about how hot can a protostar get
about 10,000 kelvins
what is the radius of the sun
432,690 mi
What makes a red supergiant collapse
When there are no more elements for the star to fuse, the core succumbs to gravity and collapses
Why are black holes so dense
an enormous amount of mass is packed into a tiny volume.