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Curious Kids: how are galaxies formed?

By Jacco van Loon, Astronomer, Keele University
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How are galaxies formed? – Harsh, aged 14, Kolkata, India

To answer the question of how galaxies were formed, we need to travel back in time to close to the birth of the universe, nearly 14 billion years ago. The great thing about the universe is that we can do exactly that. Because light takes time to travel to us, when we look at a distant galaxy we are seeing it as it was in the past.

The furthest back we can look is 400,000 years after the


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