This was the dimension of the footprint left by Neil Armstrong boot in 1969. The exterior shell is the same size for all the astronauts’ boots. Neil Armstrong stepped on the moon during the Apollo 11 mission. Apollo 11 mission was the first space flight so far landing humans on the moon.

The diameter of the sun is 1392000km. The sun is around 149.6 million kilometers from Earth. It takes about 8 minutes and 19 seconds for sunlight to reach the Earth.

Different methods were used by scientists to measure the age of the universe. Methods such as measuring the composition of matter and energy density. They measured the age of the oldest stars in space to calculate the age of Earth. It is believed that Earth should continue to exist for billions of years.