Birth of a Star
This force plays a major role in star formation
What is gravity?
The major factors in determining a star's life span is
What is size and mass?
After a supergiant explodes some material is leftover and may form a
What is a neutron star?
The X-axis on the HR diagram
What is temperature?
This cloud of dust and gas is the birth place of stars
What is a nebula (interstellar cloud)
A low or medium compressed star will ultimately turn into this at the end of it's life span
What is a dwarf star?
The death of an average-mass star is a beautiful event called this.
What is a planetary nebula?
The y-axis on the HR diagram.
What is luminosity?
When stars form, they are made of these two elements
What are hydrogen & helium?
After becoming a super red giant, a massive star ends its life with this event
What is a supernova?
The next phase in the Sun's life is this stage.
What is a red giant?
The roughly linear portion of the HR diagram which represents stars fusing H to He in their cores.
What is the main sequence?
This process separates stars from other celestial bodies
What is nuclear fusion?
A star with a core of this mass or greater will become a black hole.
What is 3x the mass of the sun?
This type of star has gravity so strong nothing can escape
What is a black hole?
The hot, dim category on the HR diagram.
What are white dwarves?
This is the first stage in a star's formation
What is a protostar?
A teaspoon of white dwarf has this approximate mass.
What is 50 bears?
This is the final element fused in the course of a massive star's regular lifetime.
What is iron?
The two scientists, H and R.
Who are Hertzsprung and Russell?