Still obsessed by not seeing the main auroras so I tried to imagine them and their spectacular colours. When you look at the incredible photos people have taken my rendition isn’t very exciting but I would have liked to see more than I did. Auroras are charged particles that follow the Earth’s magnetic field down to the poles. Without that magnetic shield we would be exposed to the radiation of space that would slowly deplete our atmosphere. Our magnetism is caused by Earth’s rotating molten core. Life on Earth is protected by it. Mars, a smaller planet has no magnetism and has lost its atmosphere because of this .