Do you want to travel to outer space?

Along with the development of science and technology, space travel is no longer just a dream.

NASA is planning to send two astronauts to space in May of this year.

Scientists discover Mars does not suit human inhabitation.

Earth is one of the 8 biggest planets in the solar system.

Earth is our common home.

Halley's Comet is one of the comets that can be seen with the naked eye, it circles the sun once every 76years.

1969 July 20th, humans landed on the moon for the first time.

Man-made satellites can be launched into space using rockets.

Gravity is the force experienced by objects due to the attractive force of the earth.

An apple falling from a tree to the ground can prove the existence of gravity.

After entering outer space, astronauts can live and perform scientific research in a space ship.

The distance between the Sun and Earth is about 149.6 million kilometers.

The sun rises every day.

The rain stopped, the sun came out.