Name____________________________________________________________________
Astronomy Packet 6
1) The source of all power in a star is ____________________ during this
process_______________________________ atoms are ________to make
________________________________ atom, The brightness of a star is called____________
there are 2 types ________________ and ________________. ________________ is defined
as how bright a star appears due to its __________ from the ___________ while
_____________ is the brightness when viewed from __________________________________.
Stars are broken into ___ Spectral Types M stars are _______ and have a surface temp
of___________ K-type are____________ with a surface temp of_________. Type G
are_______ and have a surface temp of _________. Type F stars are ___________ with a
surface temp of _____________. Type A are ___________ with a surface temp of__________,
Type B are ___________ with a surface temp of ______________, Type O are
_______________ with a surface temp of __________________. Stars are classified on the
________________________________ by ______________________ and
_____________________.Most stars are classified ____________________ with other
groupings as ________, __________ and______________.
2) All stars begin there lives in ___________ which are huge clouds of _________
and_________. There are many different types of ___________ that exist; ________________
give off large amounts of light and energy an example of which is the _____________________.
A _______________________ is one type of stellar cloud which gives off no light and is only
seen _________________________ an example being __________________. Another type is a
______________________which blocks light being produced from behind it an example being
the _____________ a_________________ is formed when a giant star dies and outgases an
example being the____________________. The final type of ________________ is called a
__________________ and is caused when a star_____________.
3) Infant stars are called_______________ and form through the process known
as____________. Once these infant stars reach a temperature of __________ and a mass
of_______ the Sun they begin their long lives. If a infant star fails to reach this threshold it
becomes a ________________ or stillborn star. The smallest main sequence stars are called
__________the average surface temperature is _________ and they are between
___________ solar masses. The life expectancy of these stars is roughly____________ making
them the_____________ stars. Two examples of this type of star are_____________ and
__________. The next type of star is a __________with the average surface temperature of
_________ and they are between ___________ solar masses. The life expectancy of these stars
is roughly____________ . An example of this type of star is_____________. The next type of
star is a __________with the average surface temperature of _________ and they are
between ___________ solar masses. The life expectancy of these stars is
roughly____________ . An example of this type of star is_____________. The next type of star
is a __________with the average surface temperature of _________ and they are between
___________ solar masses. The life expectancy of these stars is roughly____________ . An
example of this type of star is_____________. The next type of star is a __________with the
average surface temperature of _________ and they are between ___________ solar masses.
The life expectancy of these stars is roughly____________ . An example of this type of star The
next type of star is a __________with the average surface temperature of _________ and they
are between ___________ solar masses. The life expectancy of these stars is
roughly____________ . An example of this type of star is_____________.
is_____________. The next type of star is a __________with the average surface temperature
of _________ and they are between ___________ solar masses. The life expectancy of these
stars is roughly____________ . An example of this type of star is_____________. The next type
of star is a __________with the average surface temperature of _________ and they are
between ___________ solar masses. The life expectancy of these stars is
roughly____________ . 2 examples of this type of star are_____________ and
_______________..
4) The fate of a star depends on its ________ the _____________ this is the shorter the
lifespan of the star. Our sun is expected to live another__________ after which it will become a
____________ when its core begins fusing_________ into____________ and __________. This
will cause its outer layers to ________ and ____________. This will cause all the inner planets
to be____________ including us. Finally once the core is completely___________ the outer
layer will form a ____________________ and the core will become a __________________
roughly the size of______________ but with a density _______________ that of earth. A
teaspoonful of material from this object would weigh _________________ on earth As this
cools it will slowly turn into a _____________________________, For stars between 5-300x the
mass of our sun a much more violent death awaits a___________________. There are actually
2 types Type___ and ____. Type__ actual involve a binary star system consist of a main
sequence star and a _________. The _________ pulls material of its partner until it builds up a
mass of about 1.4x the mass of our Sun this is known as the
______________________________. The second type involves _____ and_______________
stars whose cores have begun to fuse heavy elements once the core is entirely _________ the
fusion reactions stops and the the star_____________, After the explosion the remaining core
can become either a ___________________ or_______________. A ______________ is what
happens when the core of an exploded star shrinks down to about 12 miles in diameter and all
the protons and ______ fuse to form __________ due to the massive amount of gravity
present. These objects often rotate very rapidly and beam out light in rapid___________ giving
them the name _____________. If they have extremely strong magnetic fields they are often
called ____________ It is suspected that objects colliding with these stellar corpses may cause
, _____________ which are among the most energetic events in the universe. The other
possible outcome for the core of the star is for it to form a______________. A ______________
is basically gravity gone ________. The strength of gravity is so strong that
the______________ for the ______________ is higher than the speed of____. The very center
of the ___________________ is known as the ______________ which is a region of
__________________ and _________________________.This object is surrounded by a region
known as the __________________ which is effectively a point of no-return for anything that
crosses this region of space. The distance away from the center of a __________________ at
which the ______________ is located is called the ____________________ radius. These
objects aren’t visible to us but can “seen by using________________ and _________________
waves given of by_______________ disk surrounding these objects. It was once believed that
these objects were stationary but we have found some that_______________. If one of these
encountered our planet it would _______________________ or pull all matter into itself.
There are 3 different categories for this type of object._____________________________ are
very small and exist only for a few___________. ________________________ are the second
type and most well understood type. The final and largest type is a
_______________________________ which are located in the ___________ of almost
all______________. In the Milky way this is identified as _____________________ It is
assumed to have a mass of approximately _________________. Most of this information was
collected through the use of the______________________ and ________________________
telescopes.