Credit: ESA/NASA

Earth and its moon

Earth has one natural satellite (a space or celestial body that orbits another planet) called “Moon”.

The Moon lacks an atmosphere or weather and is very hot during the day (107 degrees Celsius) but very cold at night (-153 degrees Celsius).

The Moon it is a dusty ball of rock and its surface has mountains, huge craters from comets and asteroids that have collided with the surface over time and flat planes called ‘seas’ made of hardened lava.

Moon is the fifth largest moon in the Solar System and roughly a quarter of the size of Earth.

How many people walked on the moon?

In total, 14 people, as part of the Apollo program, have walked on the Moon: Neil Armstrong, Buzz Aldrin, Pete Conrad, Alan Bean, Alan Shepard, Edgar Mitchell, David Scott, James Irwin, John Young, Charles Duke, Eugene Cernan, and Harrison Schmitt.

What was Apollo 11?

Apollo 11, was the spaceflight that first landed humans on the Moon. It was made of 3 parts:

  1. The command module: were the 3 astronauts (Commander Neil Armstrong, pilot Buzz Aldrin, pilot Michael Collins) worked and slept.
  2. The service module: containing the power and life support systems.
  3. The lunar module “The Eagle”: that landed on the moon.

Commander Neil Armstrong and lunar module pilot Buzz Aldrin formed the American crew that landed the Apollo Lunar Module Eagle on July 20, 1969. They spent about 2 hours and collected lunar material to bring back to Earth. Command module pilot Michael Collins flew the command module “Columbia” alone in lunar orbit while the other 2 Astronauts were on the Moon’s surface.

Credit: NASA

Fun Facts

How was the Moon made?

The Moon was most-likely made when a rock the size of Mars smashed into Earth, shortly after the solar system began forming about 4.5 billion years ago.

Why is there no blue sky on the moon?

Because there is no atmosphere.

Do you see the same face of moon?

Yes, the Moon always shows Earth the same face, because it is in synchronous rotation with Earth.

Is the Moon distance from Earth always the same?

No, the Moon is moving approximately 3.8 cm away from our planet every year.

What are moonquakes?

Similar to earthquakes, moonquakes are caused by the gravitational influence of the Earth, much weaker than earthquakes but can last up to half an hour.

Is there water on the Moon?

The water on the Moon was likely delivered to the surface by comets. This is in the form of ice trapped within dust and minerals on and under the surface.