On Tuesday morning, solar activity news website Spaceweather.com reported: "There are two sunspots on the farside of the sun so large they are affecting the way the sun vibrates." The study of the sun's vibrations is known as helioseismology, and it's a key area of solar science. Helioseismology involves studying sound waves from inside the sun, which can give clues as to what's happening on parts of the sun we can't see. It's similar to regular seismology here on Earth, in which scientists can work out what's going on inside our planet by studying sound waves that travel through our...