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the sun is a kind of star | 1 |
the earth revolves around the sun | 1 |
when a hemisphere is tilted away from the sun , that hemisphere receives less direct sunlight | 1 |
summer is when a hemisphere is tilted towards the sun | 1 |
the northern hemisphere is a kind of hemisphere of earth | 1 |
when a hemisphere is tilted towards the sun , that hemisphere receives more direct sunlight | 1 |
winter is when a hemisphere is tilted away from the sun | 1 |
receiving direct sunlight causes objects to become warm | 1 |
1 month is equal to 27-31 days | 1 |
a complete revolution / orbit of the moon around the earth takes 1 / one month | 1 |
earth rotating on its tilted axis occurs once per day | 1 |
a planet rotating causes cycles of day and night on that planet | 1 |
earth is a kind of planet | 1 |
a complete rotation of the moon takes 1 / one month | 1 |
rotation is the circular movement of an object around a center / axis | 1 |
australia is located in the southern hemisphere | 1 |
the winter in the southern hemisphere is during the summer in the northern hemisphere | 1 |
summer is when a hemisphere is tilted towards the sun | 1 |
the northern hemisphere is tilted toward the sun | 1 |
1 year is equal to 12 months | 1 |
a complete revolution / orbit of the moon around the earth takes 1 / one month | 1 |
a complete revolution / orbit of the earth around the sun takes 1 / one year / solar year / earth year | 1 |
a complete rotation of the moon takes 1 / one month | 1 |
the moon rotates on its axis | 1 |
summer is when a hemisphere is tilted towards the sun | 1 |
the northern hemisphere is a kind of hemisphere of earth | 1 |
a complete rotation of the earth on earth 's axis / itself takes 1 / one day | 1 |
1 year is equal to 365 days | 1 |
a complete revolution / orbit of the earth around the sun takes one year | 1 |
the solar system contains the moon | 1 |
the moon is the celestial object that is closest to the earth | 1 |
the stars in the night sky are very far away from the earth | 1 |
as distance to an object increases , that object will appear smaller | 1 |
a planet is a kind of celestial object / body | 1 |
a star is a kind of celestial object / celestial body | 1 |
the sun is the star that is closest to earth | 1 |
as distance from an object decreases , that object will appear larger | 1 |
earth is a kind of planet | 1 |
as the size of a light source increases , that light will appear brighter | 1 |
a star produces light and heat | 1 |
a source of something emits / produces / generates / provides that something | 1 |
stars are located light years apart from each other | 1 |
the sun is a kind of star | 1 |
light year is a measure of the distance light travels in one year | 1 |
proxima centauri is a kind of star | 1 |
stars are located light years apart from each other | 1 |
light years ly are an astronomy unit used for measuring length / distance generally used for values between 1 and 27000000000 | 1 |
light year is a measure of the distance light travels in one year | 1 |
an object is 10 light years from earth | 1 |
light years ly are an astronomy unit used for measuring length / distance generally used for values between 1 and 27000000000 | 1 |
stars are located light years apart from each other | 1 |
the new moon is when the moon is in between the sun and the earth | 1 |
a solar eclipse is when the moon blocks the earth from the sun | 1 |
the new moon is when the dark half of the moon faces the earth | 1 |
if the earth is in between the sun and the moon, then the earth can block the light on the moon | 1 |
an object blocking light causes a shadow | 1 |
the full moon is when the earth is in between the sun and the moon | 1 |
a lunar eclipse is formed by earth 's shadow falling on the moon | 1 |
a galaxy is held together by gravity | 1 |
a galaxy is made of stars | 1 |
a galaxy is a kind of very large system of stars | 1 |
galaxies often contain hundreds of billions of stars | 1 |
a galaxy is a kind of celestial body / celestial object | 1 |
a celestial object has 200 billion stars, 30 million light years from earth, and 500 light years in diameter | 1 |
galaxies are usually thousands of light years in diameter | 1 |
galaxies are located millions of light years from earth | 1 |
spiral is a kind of shape | 1 |
the milky way is spiral in shape | 1 |
galaxies can be classified by shape | 1 |
the milky way is a kind of galaxy | 1 |
a galaxy contains dusts / stars / planets | 1 |
if something contains something else, then that something is made of that something else | 1 |
a galaxy is held together by gravity | 1 |
a space telescope captured images of star clusters that contains billions of stars | 1 |
galaxies often contain hundreds of billions of stars | 1 |
a halo contains mostly old stars | 1 |
a halo is a part of a galaxy | 1 |
the milky way is a kind of galaxy | 1 |
a galaxy is a kind of structure | 1 |
the sun is located in the milky way galaxy | 1 |
the milky way is a kind of galaxy | 1 |
galaxies often contain hundreds of billions of stars | 1 |
a galaxy is a kind of structure | 1 |
if an object reflects light toward the eye then that object can be seen | 1 |
the moon reflects sunlight towards the earth | 1 |
a moon is a kind of celestial object / celestial body | 1 |
eyes are part of a human for seeing | 1 |
there are humans on earth | 1 |
a moon is a kind of satellite | 1 |
the moon reflects sunlight towards the earth | 1 |
the solar system contains the moon | 1 |
the moon orbits the earth | 1 |
the moon 's surface contains flat areas | 1 |
the lunar / moon 's surface contains many craters | 1 |
the moon 's surface contains highlands | 1 |
the earth 's surface contains many craters | 1 |
the lunar / moon 's surface contains many craters | 1 |
drier means lower in amount of water / wetness / moisture | 1 |
the moon has less water / air than the earth | 1 |
earth has air | 1 |