The solar system is racing along at about 828,000 kilometres per hour as it orbits the centre of our galaxy the Milky Way, that epic journey takes a long time to complete and is called a galactic or cosmic year.
Roughly how many Earth years is a galactic or cosmic year?
34 million years / 230 million years / 470 million years
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Answer to question 9 / 230 million years.
The Sun the Earth and the millions of other objects that make up the solar system travel around the centre of our galaxy once every 230 million years. As I said that long journey is called a galactic or cosmic year, so you could say that the Earth is almost 20 cosmic years old, which sounds a lot younger than 4.5 billion years old.
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Questions About Space
Non-FictionQuestions with multiple answers about space and our world. Choose one and scroll down to see the detailed answer. Good luck.
