EXPANDING UNIVERSE
Dear HIW,
I know that the universe is constantly expanding, but I don’t understand how this works. Can you explain?
Tegan Yiu
Thank you for your question, Tegan. The expanding universe is a tricky one to envisage because it’s occurring on such a grand scale that we will never see it happening. Ever since the universe came into existence following the Big Bang, it has been expanding. Most other galaxies are moving away from ours, the Milky Way, all the time. This is because the Big