metors
how many types of meteors are there
3 types
how many types of galaxies are there
spiral, elliptical, and irregular.
where do stars come from
clouds of gas and dust
what are asteroids
small, rocky objects that orbit the Sun.
is the sun a star
Our Sun is a medium-sized star
types of meteors
iron, stony, stony-iron
what are the types of galaxies
elliptical, spiral and irregular.
What is the birth of a star called?
Nova
what are asteroids made of
clay and silicate rocks, and are dark in appearance
what is the sun mostly made of
hydrogen (about 70%) and helium (about 28%).
what are meteor showers
lyrids, perseids, and leonids
what are galaxies made up of
Galaxies consist of stars, planets, and vast clouds of gas and dust
planetary nebula
a region of cosmic gas and dust formed from the cast-off outer layers of a dying star.
What is a Near-Earth Object (NEO)?
an asteroid or comet which passes close to the Earth's orbit.
what is a sunspot
areas that appear dark on the surface of the Sun.
what causes a meteor shower
when the Earth passes through the trail of debris left by a comet or asteroid.
how are galaxies classified
by shape.
what is a supernova
A supernova is the colossal explosion of a star.
how many asteroids are in the solar system
between 1.1 and 1.9 million
How hot is the Sun?
about 10,000 Fahrenheit
how are meteors made
Meteoroids are space rocks that range in size from dust grains to small asteroids.
where are we located in our galaxy
one of the spiral arms of the Milky Way
the life cycle of a star
From nebula to protostar, through the main sequence to red giant before ending as a white dwarf, neutron star, or black hole
Why is the asteroid belt located between Mars and Jupiter?
one or more planets could have formed, but the gravity from Jupiter kept pulling things apart.
How old is the Sun.
4.6 billion years ago