asteroid
سیارک
Asteroids are tiny planets that mostly orbit between Mars and Jupiter.
asteroid belt
کمربند سیارکی
The asteroid belt is a doughnut-shaped concentration of asteroids that orbit the Sun between the orbits of Mars and Jupiter.
astronaut
فضانورد
An astronaut goes up into space to explore.
astronomer
ستاره شناس
Astronomers are people who study astronomy and learn about objects in the universe, like stars and planets.
astronomy
ستاره شناسی
Astronomy is the science that studies the universe.
atmosphere
جو
The atmosphere is the gas that surrounds a planet.
atom
اتم
Everything is made up of tiny atoms.
aurora
سپیده دم
Auroras are beautiful lights in the near-polar sky.
Big Dipper
دب اکبر
The Big Dipper is a group of 7 stars contained in the Northern Hemisphere constellation Ursa major (the Great Bear).
1,000,000,000
billion
میلیارد
A billion is a thousand million. The Earth is billions of years old.
comet
ستاره دنباله دار
A comet is the a small, icy object that orbit the Sun. It’s tail always points away from the sun.
constellation
صورت فلکی
A constellation is a group of stars that we see in the sky. They are not necessarily located together in space, but looks as though they are from Earth.
crescent moon
هلال ماه
A crescent moon is smaller than a half moon.
Earth
زمین
The Earth is the third planet from the sun. It’s where we live!
eclipse
خسوف، کسوف
An eclipse happens when the moon blocks out light from the sun or the Earth’s shadow goes across the moon.
falling star
ستاره در حال سقوط
A falling star is not a star; it is a meteor (made of rock and/or iron) which is burning up in the Earth’s atmosphere.
full moon
ماه کامل
A full moon appears as an entire circle in the sky.
galaxy
کهکشان
A galaxy is an enormous group of stars.
gibbous moon
ماه محدب یا سه چهارم ماه
A gibbous moon is between a half moon and a full moon.
half moon
ماه نیمه
A half moon looks like half a circle.
Jupiter
مشتری
Jupiter is the largest planet in our solar system and the fifth planet from the sun.
Little Dipper
دب اصغر
The Little Dipper is a group of stars in the constellation Ursa minor (the Little Bear). This group of stars ends at Polaris, the pole star of the Northern Hemisphere.
