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the full moon is when the earth can cause a shadown on the moon & a lunar eclipse is formed by earth 's shadow falling on the moon -> the <mask> moon is when a lunar eclipase can happen
full
the full moon is when the earth can cause a shadown on the moon & a lunar eclipse is formed by earth 's shadow falling on the moon -> the full <mask> is when a lunar eclipase can happen
moon
the full moon is when the earth can cause a shadown on the moon & a lunar eclipse is formed by earth 's shadow falling on the moon -> the full moon is when a lunar eclipase can <mask>
happen
a galaxy is held together by gravity & a galaxy is made of stars -> a <mask> is made of stars that is held together by gravity
galaxy
a galaxy is held together by gravity & a galaxy is made of stars -> a galaxy is <mask> of stars that is held together by gravity
made
a galaxy is held together by gravity & a galaxy is made of stars -> a galaxy is made of <mask> that is held together by gravity
stars
a galaxy is held together by gravity & a galaxy is made of stars -> a galaxy is made of stars that is <mask> together by gravity
held
a galaxy is held together by gravity & a galaxy is made of stars -> a galaxy is made of stars that is held together by <mask>
gravity
a galaxy is made of stars that is held together by gravity & a galaxy is a kind of very large system of stars -> a <mask> is a large system of stars that is held together by gravity
galaxy
a galaxy is made of stars that is held together by gravity & a galaxy is a kind of very large system of stars -> a galaxy is a <mask> system of stars that is held together by gravity
large
a galaxy is made of stars that is held together by gravity & a galaxy is a kind of very large system of stars -> a galaxy is a large <mask> of stars that is held together by gravity
system
a galaxy is made of stars that is held together by gravity & a galaxy is a kind of very large system of stars -> a galaxy is a large system of <mask> that is held together by gravity
stars
a galaxy is made of stars that is held together by gravity & a galaxy is a kind of very large system of stars -> a galaxy is a large system of stars that is <mask> together by gravity
held
a galaxy is made of stars that is held together by gravity & a galaxy is a kind of very large system of stars -> a galaxy is a large system of stars that is held together by <mask>
gravity
galaxies often contain hundreds of billions of stars & galaxies are usually thousands of light years in diameter & galaxies are located millions of light years from earth -> <mask> often contains billions of stars, and are located millions of light years from earth, and are thousands of light years in diameter
galaxies
galaxies often contain hundreds of billions of stars & galaxies are usually thousands of light years in diameter & galaxies are located millions of light years from earth -> galaxies often <mask> billions of stars, and are located millions of light years from earth, and are thousands of light years in diameter
contains
galaxies often contain hundreds of billions of stars & galaxies are usually thousands of light years in diameter & galaxies are located millions of light years from earth -> galaxies often contains <mask> of stars, and are located millions of light years from earth, and are thousands of light years in diameter
billions
galaxies often contain hundreds of billions of stars & galaxies are usually thousands of light years in diameter & galaxies are located millions of light years from earth -> galaxies often contains billions of stars, and are <mask> millions of light years from earth, and are thousands of light years in diameter
located
galaxies often contain hundreds of billions of stars & galaxies are usually thousands of light years in diameter & galaxies are located millions of light years from earth -> galaxies often contains billions of stars, and are located <mask> of light years from earth, and are thousands of light years in diameter
millions
galaxies often contain hundreds of billions of stars & galaxies are usually thousands of light years in diameter & galaxies are located millions of light years from earth -> galaxies often contains billions of stars, and are located millions of <mask> years from earth, and are thousands of light years in diameter
light
galaxies often contain hundreds of billions of stars & galaxies are usually thousands of light years in diameter & galaxies are located millions of light years from earth -> galaxies often contains billions of stars, and are located millions of light <mask> from earth, and are thousands of light years in diameter
years
galaxies often contain hundreds of billions of stars & galaxies are usually thousands of light years in diameter & galaxies are located millions of light years from earth -> galaxies often contains billions of stars, and are located millions of light years from earth, and are <mask> of light years in diameter
thousands
galaxies often contain hundreds of billions of stars & galaxies are usually thousands of light years in diameter & galaxies are located millions of light years from earth -> galaxies often contains billions of stars, and are located millions of light years from earth, and are thousands of <mask> years in diameter
light
galaxies often contain hundreds of billions of stars & galaxies are usually thousands of light years in diameter & galaxies are located millions of light years from earth -> galaxies often contains billions of stars, and are located millions of light years from earth, and are thousands of light <mask> in diameter
years
galaxies often contain hundreds of billions of stars & galaxies are usually thousands of light years in diameter & galaxies are located millions of light years from earth -> galaxies often contains billions of stars, and are located millions of light years from earth, and are thousands of light years in <mask>
diameter
galaxies often contains billions of stars, and are located millions of light years from earth, and are thousands of light years in diameter & a galaxy is a kind of celestial body / celestial object & a celestial object has 200 billion stars, 30 million light years from earth, and 500 light years in diameter -> the <mask> being described are galaxies
objects
galaxies often contains billions of stars, and are located millions of light years from earth, and are thousands of light years in diameter & a galaxy is a kind of celestial body / celestial object & a celestial object has 200 billion stars, 30 million light years from earth, and 500 light years in diameter -> the objects being <mask> are galaxies
described
galaxies often contains billions of stars, and are located millions of light years from earth, and are thousands of light years in diameter & a galaxy is a kind of celestial body / celestial object & a celestial object has 200 billion stars, 30 million light years from earth, and 500 light years in diameter -> the objects being described are <mask>
galaxies
spiral is a kind of shape & galaxies can be classified by shape -> <mask> galaxy is a type of galaxy
spiral
spiral is a kind of shape & galaxies can be classified by shape -> spiral <mask> is a type of galaxy
galaxy
spiral is a kind of shape & galaxies can be classified by shape -> spiral galaxy is a <mask> of galaxy
type
spiral is a kind of shape & galaxies can be classified by shape -> spiral galaxy is a type of <mask>
galaxy
spiral galaxy is a type of galaxy & the milky way is spiral in shape & the milky way is a kind of galaxy -> the milky <mask> is a kind of spiral galaxy
way
spiral galaxy is a type of galaxy & the milky way is spiral in shape & the milky way is a kind of galaxy -> the milky way is a <mask> of spiral galaxy
kind
spiral galaxy is a type of galaxy & the milky way is spiral in shape & the milky way is a kind of galaxy -> the milky way is a kind of <mask> galaxy
spiral
spiral galaxy is a type of galaxy & the milky way is spiral in shape & the milky way is a kind of galaxy -> the milky way is a kind of spiral <mask>
galaxy
a galaxy contains dusts / stars / planets & if something contains something else, then that something is made of that something else -> a <mask> is made of dusts, stars, and planets
galaxy
a galaxy contains dusts / stars / planets & if something contains something else, then that something is made of that something else -> a galaxy is <mask> of dusts, stars, and planets
made
a galaxy contains dusts / stars / planets & if something contains something else, then that something is made of that something else -> a galaxy is made of dusts, stars, and <mask>
planets
a galaxy is made of dusts, stars, and planets & a galaxy is held together by gravity -> a <mask> is made of dusts, stars, and planets held together by gravity
galaxy
a galaxy is made of dusts, stars, and planets & a galaxy is held together by gravity -> a galaxy is <mask> of dusts, stars, and planets held together by gravity
made
a galaxy is made of dusts, stars, and planets & a galaxy is held together by gravity -> a galaxy is made of dusts, stars, and <mask> held together by gravity
planets
a galaxy is made of dusts, stars, and planets & a galaxy is held together by gravity -> a galaxy is made of dusts, stars, and planets <mask> together by gravity
held
a galaxy is made of dusts, stars, and planets & a galaxy is held together by gravity -> a galaxy is made of dusts, stars, and planets held together by <mask>
gravity
a space telescope captured images of star clusters that contains billions of stars & galaxies often contain hundreds of billions of stars -> the <mask> cluster that captured by the space telescope is a galaxy
star
a space telescope captured images of star clusters that contains billions of stars & galaxies often contain hundreds of billions of stars -> the star <mask> that captured by the space telescope is a galaxy
cluster
a space telescope captured images of star clusters that contains billions of stars & galaxies often contain hundreds of billions of stars -> the star cluster that <mask> by the space telescope is a galaxy
captured
a space telescope captured images of star clusters that contains billions of stars & galaxies often contain hundreds of billions of stars -> the star cluster that captured by the <mask> telescope is a galaxy
space
a space telescope captured images of star clusters that contains billions of stars & galaxies often contain hundreds of billions of stars -> the star cluster that captured by the space <mask> is a galaxy
telescope
a space telescope captured images of star clusters that contains billions of stars & galaxies often contain hundreds of billions of stars -> the star cluster that captured by the space telescope is a <mask>
galaxy
a halo is a part of a galaxy & the milky way is a kind of galaxy -> a <mask> is part of the milky way
halo
a halo is a part of a galaxy & the milky way is a kind of galaxy -> a halo is <mask> of the milky way
part
a halo is a part of a galaxy & the milky way is a kind of galaxy -> a halo is part of the milky <mask>
way
a halo is part of the milky way & a halo contains mostly old stars -> the <mask> is the part of the milky way that contains mostly old stars
halo
a halo is part of the milky way & a halo contains mostly old stars -> the halo is the <mask> of the milky way that contains mostly old stars
part
a halo is part of the milky way & a halo contains mostly old stars -> the halo is the part of the milky <mask> that contains mostly old stars
way
a halo is part of the milky way & a halo contains mostly old stars -> the halo is the part of the milky way that <mask> mostly old stars
contains
a halo is part of the milky way & a halo contains mostly old stars -> the halo is the part of the milky way that contains mostly <mask> stars
old
a halo is part of the milky way & a halo contains mostly old stars -> the halo is the part of the milky way that contains mostly old <mask>
stars
a galaxy is a kind of structure & the milky way is a kind of galaxy -> the milky <mask> is a kind of strucutre
way
a galaxy is a kind of structure & the milky way is a kind of galaxy -> the milky way is a <mask> of strucutre
kind
the milky way is a kind of strucutre & the sun is located in the milky way galaxy -> the <mask> is located in the structure called milky way galaxy
sun
the milky way is a kind of strucutre & the sun is located in the milky way galaxy -> the sun is <mask> in the structure called milky way galaxy
located
the milky way is a kind of strucutre & the sun is located in the milky way galaxy -> the sun is located in the <mask> called milky way galaxy
structure
the milky way is a kind of strucutre & the sun is located in the milky way galaxy -> the sun is located in the structure <mask> milky way galaxy
called
the milky way is a kind of strucutre & the sun is located in the milky way galaxy -> the sun is located in the structure called milky <mask> galaxy
way
the milky way is a kind of strucutre & the sun is located in the milky way galaxy -> the sun is located in the structure called milky way <mask>
galaxy
galaxies often contain hundreds of billions of stars & a galaxy is a kind of structure -> <mask> are the structure that contain hundreds of billions of stars
galaxies
galaxies often contain hundreds of billions of stars & a galaxy is a kind of structure -> galaxies are the <mask> that contain hundreds of billions of stars
structure
galaxies often contain hundreds of billions of stars & a galaxy is a kind of structure -> galaxies are the structure that <mask> hundreds of billions of stars
contain
galaxies often contain hundreds of billions of stars & a galaxy is a kind of structure -> galaxies are the structure that contain <mask> of billions of stars
hundreds
galaxies often contain hundreds of billions of stars & a galaxy is a kind of structure -> galaxies are the structure that contain hundreds of <mask> of stars
billions
galaxies often contain hundreds of billions of stars & a galaxy is a kind of structure -> galaxies are the structure that contain hundreds of billions of <mask>
stars
if an object reflects light toward the eye then that object can be seen & a moon is a kind of celestial object / celestial body -> if the <mask> reflects light toward the eye then the moon can be seen
moon
if an object reflects light toward the eye then that object can be seen & a moon is a kind of celestial object / celestial body -> if the moon <mask> light toward the eye then the moon can be seen
reflects
if an object reflects light toward the eye then that object can be seen & a moon is a kind of celestial object / celestial body -> if the moon reflects <mask> toward the eye then the moon can be seen
light
if an object reflects light toward the eye then that object can be seen & a moon is a kind of celestial object / celestial body -> if the moon reflects light toward the <mask> then the moon can be seen
eye
if an object reflects light toward the eye then that object can be seen & a moon is a kind of celestial object / celestial body -> if the moon reflects light toward the eye then the <mask> can be seen
moon
if an object reflects light toward the eye then that object can be seen & a moon is a kind of celestial object / celestial body -> if the moon reflects light toward the eye then the moon can be <mask>
seen
eyes are part of a human for seeing & there are humans on earth -> <mask> on earth can see through their eyes
humans
eyes are part of a human for seeing & there are humans on earth -> humans on <mask> can see through their eyes
earth
eyes are part of a human for seeing & there are humans on earth -> humans on earth can <mask> through their eyes
see
eyes are part of a human for seeing & there are humans on earth -> humans on earth can see through their <mask>
eyes
if the moon reflects light toward the eye then the moon can be seen & humans on earth can see through their eyes & the moon reflects sunlight towards the earth -> the <mask> can be seen by the humans on earth
moon
if the moon reflects light toward the eye then the moon can be seen & humans on earth can see through their eyes & the moon reflects sunlight towards the earth -> the moon can be <mask> by the humans on earth
seen
if the moon reflects light toward the eye then the moon can be seen & humans on earth can see through their eyes & the moon reflects sunlight towards the earth -> the moon can be seen by the <mask> on earth
humans
if the moon reflects light toward the eye then the moon can be seen & humans on earth can see through their eyes & the moon reflects sunlight towards the earth -> the moon can be seen by the humans on <mask>
earth
the moon reflects sunlight towards the earth & the moon orbits the earth -> the <mask> reflects sunlight towards the earth and it orbits the earth
moon
the moon reflects sunlight towards the earth & the moon orbits the earth -> the moon <mask> sunlight towards the earth and it orbits the earth
reflects
the moon reflects sunlight towards the earth & the moon orbits the earth -> the moon reflects <mask> towards the earth and it orbits the earth
sunlight
the moon reflects sunlight towards the earth & the moon orbits the earth -> the moon reflects sunlight towards the <mask> and it orbits the earth
earth
the moon reflects sunlight towards the earth & the moon orbits the earth -> the moon reflects sunlight towards the earth and it <mask> the earth
orbits
the moon reflects sunlight towards the earth & the moon orbits the earth -> the moon reflects sunlight towards the earth and it orbits the <mask>
earth
the moon reflects sunlight towards the earth and it orbits the earth & a moon is a kind of satellite -> the <mask> is a satellite that reflects sunlight towards the earth and orbits the earth
moon
the moon reflects sunlight towards the earth and it orbits the earth & a moon is a kind of satellite -> the moon is a <mask> that reflects sunlight towards the earth and orbits the earth
satellite
the moon reflects sunlight towards the earth and it orbits the earth & a moon is a kind of satellite -> the moon is a satellite that <mask> sunlight towards the earth and orbits the earth
reflects
the moon reflects sunlight towards the earth and it orbits the earth & a moon is a kind of satellite -> the moon is a satellite that reflects <mask> towards the earth and orbits the earth
sunlight
the moon reflects sunlight towards the earth and it orbits the earth & a moon is a kind of satellite -> the moon is a satellite that reflects sunlight towards the <mask> and orbits the earth
earth
the moon reflects sunlight towards the earth and it orbits the earth & a moon is a kind of satellite -> the moon is a satellite that reflects sunlight towards the earth and <mask> the earth
orbits
the moon reflects sunlight towards the earth and it orbits the earth & a moon is a kind of satellite -> the moon is a satellite that reflects sunlight towards the earth and orbits the <mask>
earth