Tag Archives: Gravitational waves

Concept of a black hole acting as a lens on background light. Dotted Yeti/Shutterstock Adam McMaster, The Open University and Andrew Norton, The Open University Astronomers famously snapped the first ever direct image of a black hole in 2019, thanks to material glowing in its presence. But many black holes are actually near impossible to detect. Now another team using …

What happened during the Big Bang? FlashMovie/Shutterstock Francesco Muia, University of Cambridge Exactly what happened at the beginning of the universe, 14 billion years ago, is one of the greatest mysteries in physics – there’s no simple way to probe it. That’s because, in its early stages, the universe was filled with a dense plasma – a gas made out …