How Stars Form
What is a Nebula?
Large cloud of dust spread out over a large volume of space
What determines a star's place on the main sequence and how long will it stay?
The star's mass
What is a planetary nebula?
Glowing cloud of gas that surrounds a dying star
Why do large stars die so fast?
They consume more energy than most stars
What are the three types of star clusters?
Open clusters, associations, and globular clusters
What part of the Nebulae do stars form in?
In the densest part
What do high-mass stars become?
Become very blue and bright main sequence stars
How is a black dwarf formed?
Once a white dwarf cannot produce anymore visible light
What is the collapse of a giant star called?
a supernova
What is a global cluster?
What is a Protostar?
A contracting cloud of gas and dust with enough mass to form a star
Why do average main-sequence stars live longer?
They use less energy because they aren't producing as much heat and brightness
What is the reason for a star to die?
Once a star runs out of hydrogen and helium have run out and other elements are not making the star shine
True or False- A supernova can create elements heavier than iron.
True
What are the four main types of galaxies?
Spiral, Barred-spiral, Elliptical, and Irregular
What is a Nuclear fusion?
When a star is formed when a contracting cloud of gas and dust becomes so dense and hot it begins a fusion
On the scale how big is the sun compared to other stars?
The Sun is an average-sized star
Has a black dwarf formed in our universe?
No, our universe isn't old enough yet
What is a neutron star?
Dense remnant of a high-mass star that has exploded as a supernova
What is a quasar?
A bright light from the center of a young galaxy
How does gravity help with the formation of a star?
Gravity pulls the nebula dust and gas together is a smaller more condensed area
Roughly how hot is the surface of a red star?
3,500K
How does a white dwarf form?
When a stars outer mass has died off only the core of the star remains
What is a pulsar?
A spinning neutron star that appears to give off strong radio waves
How many stars does the Milky Way have?
Roughly 200 to 400 billion stars