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ISSUE 148
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ISSUE 149
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It’s said that nothing can travel faster than the speed of light. Einstein’s theory of special relativity states that massless photons travelling within a vacuum are so fast, at speeds of 299,338 kilometres (186,000 miles) per second, that nothing in the universe can exceed them. Of course, physicists are continually trying to push the boundaries of our knowledge, as you’ll discover in our cover feature this issue. Will Einstein’s theory continue to stand the test of time? Elsewhere this issue, we reveal the top stargazing events of 2024 that can’t be missed. From solar and lunar eclipses to meteor showers and conjunctions, there’s something for everyone to observe, whether you have a telescope, binocular or are just content with using your unaided eye. We also keep you up to date with the latest space news and images from ground and spacebased telescopes alongside our regular features: Ask Space, where our experts answer your questions; reviews of the latest astronomy kit, books and software; future tech; interviews and more.