The type of death a star will experience depends on
mass
Which force is most responsible for the formation of a pre-star?
gravity
Stars with surface temperature less than 3000K appear _______
red
Stellar distances are usually expressed in units called ______
light years
The brightness of a star, if it were at a distance of 32.6 light-years, is its
absolute magnitude
According to the Big Bang theory, a cataclysmic explosion created the matter in the Universe about _______ years ago
15 million
The magnitude of a star as we "see" it from Earth?
apparent magnitude
Very massive stars terminate in a brilliant explosion called a _______
supernova
One light-year is about __________.
9.5 trillion kilometers
A very young, large object that is soon to become a star but is not yet hot enough for nuclear fusion is termed a _________.
protostar
What is the main fuel for a red giant
helium
A(n) __________, is a famous interstellar mass that absorbs ultraviolet light from an embedded or nearby star and radiates, or emits this energy as visable light
bright nebula
Which color stars have the hottest surface temperature.
blue
The final stage for a star that is as massive as the Sun
white dwarf
The apparent change in wavelength of radiation caused by the relative motions of the source and the observer is referred to as _________.
the Doppler effect
Most stars are in this stage of evolution
main-sequence
The apparent change in the the position of a celestial object due to the orbital motion of Earth is called _________
stellar parallax
The red shifts exhibited by galaxies can be explained by ________
an expanding universe
What is labeled on the y-axis of the H-R Diagram?
Absolute magnitude
This is produced during a supernova event.
black hole
An interstellar accumulation of dust and gases is referred to as
nebula
Which part of the HR Diagram are the redgiants located?
upper right
What is produced as a result medium mass star collapsing?