Artist’s concept of the AGN lying at the center of the NGC 4151 galaxy with the Solar System overlaid to provide scale. Keck Observatory’s twin 10-meter telescopes, to achieve the resolution power of an 85m telescope. However, the apparent size of this ring is so small that the observations were carried out using infrared interferometry to combine W. The hot dust forms a ring around the supermassive black hole and emits infrared radiation, which the researchers used as the ruler. In this process, the material heats up and becomes very bright – becoming the most energetic sources of emission in the universe known as active galactic nuclei (AGN). And in about a tenth of all galaxies, these supermassive black holes continue to grow by swallowing huge amounts of gas and dust from their surrounding environments. Scientists have observed that all big galaxies in the universe have a supermassive black hole in their center. Indeed, as in the famous saga, a ring plays a crucial role in this new measurement. Recently reported distances range from 4 to 29 megaparsecs, but using this new method the researchers calculated a distance of 19 megaparsecs to the supermassive black hole.
The galaxy NGC 4151, which is dubbed the “Eye of Sauron” by astronomers for its similarity to the depiction of Sauron in “The Lord of the Rings” trilogy, is important for accurately measuring black hole masses. Keck Observatory, near the summit of Mauna Kea in Hawaii, to accurately determine for the first time the distance to the NGC 4151 galaxy – otherwise known to astronomers as the “Eye of Sauron”. Hoenig and his team used this method at the W. Similar to what land surveyors use here on Earth, they measured the physical and angular (or apparent) size of a standard ruler in the galaxy to calibrate distance measurements. Sebastian Hoenig from the University of Southampton. However, a new and more accurate method has been developed, thanks to a team of scientists led by Dr. By gauging the brightness of these stars, scientists have been able to survey certain galaxies that lie 300 million light years from us.
In the past, this process relied on finding stars in other galaxies whose absolute light output was measurable. Knowing just how far other galaxies are in relation to our own is not only key to understanding the size of the universe, but its age as well. Determining the distance of galaxies from our Solar System is a tricky business.
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