Putting The Size of our Galaxy Into Perspective.

Reading this article should give you a better understanding of how vast our galaxy the Milky Way really is.

British spelling.

I will use the speed of Voyager 1 to give an understanding of how long it would take to reach distant objects inside our galaxy.

Voyager 1 blasted off from Cape Canaveral on September 5, 1977, sixteen days after its twin Voyager 2. Its objectives included flybys of the gas giants Jupiter, Saturn and Saturn’s largest moon Titan.

This planetary mission lasted 3 years and 3 months and since that time Voyager 1 continues to travel through space at over 60,000 kilometres per hour.

Back in 2012 it entered the Heliopause and was the first spacecraft to ever enter interstellar space, the Heliopause is the boundary of the Heliosphere, the region around the Sun that is filled with solar magnetic fields and solar winds.

This little spacecraft is the most distant man-made object that has ever left the Earth. It carries with it a gold disc, providing information about our planet Earth, the Solar System and life on Earth. Could it be possible that an extra-terrestrial life form will find it sometime in the distant future?

As of July 2022, Voyager 1 has travelled for almost 45 years and is now over 23 billion kilometres from our planet.

Voyager 1 will have its next close encounter in 38,000 years when it will pass the star AC+793888, at a distance of 1.7 light-years.

Most Scientists agree that our Moon which is 3,474 kilometres in diameter was formed about 4.5 billion years ago from ejected material thrown out into space when a planet roughly the size of Mars collided with the young Earth. It is thought that the collision is the reason the Earth is tilted on its axis by over 23 degrees, this tilt is responsible for the different seasons we witness each year.

The young Moon was a lot closer to the Earth back then, orbiting at an estimated distance of 20,000 to 30,000 kilometres from its surface, compared with the distance today of 384,400 kilometres. If mankind had been around then can you imagine how big the Moon would have looked in the night sky?

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