by Colin Stuart | May 17, 2017 | Astronomy, Explainer
The day may be 24 hours long now, but that hasn’t always been the case. Nor will it be the case in the far future. The Earth’s rotation is slowing under the gravitational influence of the Moon. Billions of years ago, the day was just 18 hours long. The Moon and the...
by Colin Stuart | Apr 30, 2017 | Explainer, Thoughts
A few weeks ago I was giving a talk in a school on my kids book Why Space Matters to Me. At the end a girl asked me what seemed a fairly simple question: “why is the sky up?” My answer was equally simple, but her jaw dropped when I gave it. “It...
