The stars we see at night may no longer be in the sky because the light takes years to get to earth.
The sun has a very large size, more than one million Earth can fit in it.
Planet Saturn has a ring consisting of ice and rock, and the ring is very thin, only about 20 meters thick.
There is a planet called the blue planet because the atmosphere consists of almost all methane gas, the planet is uranus.
There are more than 170 billion galaxies in the universe that we know, and each galaxy can have billions of stars.
Neutron stars have a very large mass, but the size is very small, only about 20 kilometers.
There is a black hole that has a mass of several billion times greater than the sun, and the gravity is very strong so that there is no light and material that can escape from it.
Planet Venus has a very high surface temperature, reaching nearly 500 degrees Celsius, and the atmosphere consists of toxic gas which makes the planet unfit for habitation.
Comets are celestial bodies consisting of ice, dust, and rocks, and usually have a tail that is seen when approaching the sun.
There are stars that release very strong radiation, called Gamma Ray stars because they produce gamma rays, which are electromagnetic radiation with very high energy.
