Stars and Constellation Flashcards
(26 cards)
● Huge collections of billions of stars
● Contain dark strips of dust and may
contain huge black holes at their
centers
galaxies
types of galaxies
spiral galaxy
elliptical galaxy
irregular galaxy
consist of a
central mass with one, two, or
three arms that spiral around
the center.
spiral galaxy
flattened pinwheels in shape
spiral galaxy
is oval, with a
bright center that gradually,
evenly dims to the edges. They
are usually the brightest
galaxies.
elliptical galaxy
are not
asymmetrical and do not look
like spiral or elliptical galaxies.
irregular galaxy
is a group of
stars that looks like a particular
shape in the sky and has been
given a name.
constellation
are balls of gas that shine
or used to shine because of
nuclear fusion in their cores.
stars
(clouds of dust and mostly hydrogen
gas)
nebulae
A cloud of interstellar gas and dust
that gradually collapses, forming a
hot dense core, and evolves into a
star once nuclear fusion can occur in
the core.
protostar
colors of stars (hottest to coldest)
BLUE (HOTTEST)
BLUE-WHITE
YELLOW
ORANGE
RED (COLDEST)
KIND OF STARS
-main sequence
-Giant and Supergiant Stars
-White dwarf stars
-novas
-supernovas
-neutron and pulsars
-black holes
are objects that are so
massive and dense that their
immense gravitational pull does
not even let light escape.
black holes
are a special type of
neutron star.
pulsars
are the collapsed
cores sometimes left behind by
supernovas explosions.
neutron stars
star that suddenly
increases greatly in brightness
because of a catastrophic
explosion that ejects most of its
mass.
supernovas
binary, or double, star in
which one member is a white dwarf
and the other is a giant or
supergiant.
novas
these stars are
smaller and dimmer
white dwarf stars
dead star
black dwarf
Stars swell as they move off the
main sequence, becoming giants
and for more massive stars–
supergiants.
giant and supergiant stars
is any star that
has a hot, dense core
which fuses
hydrogen into helium
to produce energy.
main-sequence
heliocentric
sun
geocentric
earth