Card Set Information
faiths cards astronomy test mr tom quiz mr tom test astronomy stars planets
What is astronomy?
The study of the universe
How was the Universe created?
the big bang theory
What is the Big Bang theory?
A massive explosion occurred between 10-20 billion years ago.
Ever since the big bang theory the universe has been...
All galaxies are part of the...
what is a galaxy?
a collection of millions or billions of stars
What are galaxies classified by?
what are the different types of galaxies?
spiral, elliptical, irregular
what is the main type of galaxy?
what type of galaxy is our milky way?
where is the sun located in our galaxy ?
on one of the spiral arms far from the galactic center
our sun is an ________ sized star and a _______ aged star
how old is our sun estimated to be?
4.5 billion years old
the solar system includes...
our sun, eight planets, comets, asteroids, meteoroids
What are the order of the planets?
mercury, venus, earth, mars, jupiter, saturn, uranus, neptune, (pluto)
what is in between mars and jupiter?
an asteroid belt
how did our star (sun) form?
From a nebular cloud (composed of gas and dust)
what was our sun before it was a star?
what are terrestrial planets?
the inner planets that are small and rocky
what are gas giants?
the outer planets that are large and gaseous
what are comets made of?
chunks of ice and dust
what kind of orbit do comets revolve around the sun?
an elliptical orbit
what are asteroids?
small and rocky objects that revolve around the sun
what are meteoroids made of?
chunk of rock or dust in space
what do meteoroids come from?
part of a comet or an asteroid
what was the Geocentric theory?
that the earth was in the center of our solar system
what is the Heliocentric theory?
that the sun is in the center of our solar system
what keeps planets moving?
what keeps planets in their orbit around the sun?
as earth gets closer to the sun it moves...
as earth moves further away form the sun it moves...
what are stars born from?
electromagnetic energy is radiated by...
stars vary in their...
size, mass, density, temperature and color
what is the H-R diagram used for?
to classify stars
what is a ring (for a planet)?
thin disk of small particles of rock and ice surrounding a planet
what units of measurement would we use to measure the distances of our sun to the planets in our solar system?
which are the two largest planets?
jupiter and saturn
which planet is closest size to earth?
what is a star life cycle determined by?
the stars mass
The medium sized star in our solar system is the...
to shine brightly
a star that doesn't give off light is a...
a glowing ball of gas is a...
what is the core of the star?
the middle or center of the star
what is a red giant?
a large star that glows red
to grow larger
What is the life cycle of a medium star?
nebula, medium star, red giant, planetary nebula,white dwarf, black dwarf
what is the life cycle of a huge star?
nebula, huge star, red super giant, supernova, neutron star
what is the life cycle of a giant star?
nebula, giant star, red super giant, supernova, black hole
which color star has the highest (hottest) surface temperature?