Astronomers have imaged a feeding quasar powered by a black hole at the very edge of the universe, so far away that it was seen as it appeared less than 1 billion years after the Big Bang. The quasar, named SDSS J114816.64+525150.3, is powered by a supermassive black hole of more than 3 billion times … Read more
The frequency is inversely proportional to the time period; as the time period increases, the frequency decreases. Elerium/Getty Images Frequency is a fundamental concept when talking about waves, whether electromagnetic waves such as radio waves and visible light, or mechanical vibrations such as sound waves. Knowing the frequency of a wave allows you to estimate … Read more
NASA scientists have spotted a stunning cosmic fossil that was formed when a supermassive black hole erupted more than 5 million years ago. The team at the space agency’s Goddard Space Flight Center used the X-ray Multi-Mirror Mission (XMM-Newton) space telescope with help from NASA’s Chandra X-ray Observatory to spot the X-rays that outline cold … Read more