A region of interstellar space shining with a reddish hue is a
cold core of a molecular cloud.
region of cool gas and dust.
region of hot, ionized gas.
what is a region of hot, ionized gas
100
What is a giant molecular cloud?
What is large concentration of dust and gas
200
What does Fl mean
What is Fraction of planetson which life arises
200
Which physical parameter uniquely fixes a star's location on the main sequence of the Hertzsprung-Russell diagram when it reaches this stage of its evolution?
its mass
its chemical composition
its age
What is its mass
200
What is a dense core???
What is a concentration of gas cool enough from a star
300
What is fraction that develop technology and choose to communicate
What is Fc
300
New stars most likely to form in?
What is cold,dense clouds of gas and dust
300
What 3 ways does a star form?
What is supernova shockwave
collision of 2 molecular cloud
ejection of matter from energetic (big) star
400
What does L=
What is 100 yrs
400
Which wavelength range in the electromagnetic spectrum has proved to be the most useful in investigating star birth in dense molecular clouds?
What is infrared radiation
400
What is PMS
What is Pre-Main sequence star
500
What is the Drake equation
What is N=R*FpNeFlFiFcL
500
The Hertzsprung-Russell diagram of a globular cluster contains stars along a line called the horizontal branch. These stars are converting ________ to _________ in their core