How many planets are there in the universe

The Universe is considered by some to be infinite, while others find comfort in the fact that it may have an end. Throughout the ages of space exploration, the only certain thing is maybe the fact that the Universe will never be charted. Why is this? It’s because of the endless galaxies that seem to pop out left and right, their sizes, distances, and other aspects. So how many galaxies are there in the Universe? Currently, the observable Universe, which has a radius of 46.5 billion light-years, seems to contain at least two trillion galaxies. Our galaxy, the Milky Way , is just one among these numerous galaxies, and it isn’t even considered a big galaxy. It stretches for 105,700 light-years in diameter and may contain at least 100 billion planets and around 400 billion stars. Now, if we were to imagine how many planets and stars those 2 trillion galaxies might have, we would probably have to throw out our calculators. This is especially true since some galaxies are several times larger than our Milky Way Galaxy. Largest Galaxy Ever Discovered The largest galaxy ever discovered in our Universe is the supergiant elliptical galaxy designated as IC 1101. This galaxy contains well above 100 trillion stars, and it stretches for over 5.5 million light-years across. IC 1101 is around 50 times larger than our Milky Way Galaxy, and it is situated at approximately 1 billion light-years / 320 megaparsecs away from us. How Many Galaxies are there in the Milky Way? Our own Milky Way has...

October 29, 2020, Mountain View, CA – Thanks to new research using data from the Kepler space telescope, it’s estimated that there could be as many as 300 million potentially habitable planets in our galaxy. Some could even be pretty close, with several likely within 30 light-years of our Sun. The findings will be published in The Astronomical Journal, and research was a collaboration of scientists from NASA, the SETI Institute, and other organizations worldwide. “This is the first time that all of the pieces have been put together to provide a reliable measurement of the number of potentially habitable planets in the galaxy,” said co-author The Drake Equation is a probabilistic argument that details the factors to consider when estimating the potential number of technologically advanced civilizations in the galaxy that could be detected. The Drake Equation is also often considered to be a roadmap for astrobiology and guides much of the research at the SETI Institute. To develop a reasonable estimate, the researchers looked at exoplanets similar in size to Earth and thus most likely to be rocky planets. They also looked at so-called Sun-like stars, around the same age as our Sun and approximately the same temperature. Another consideration for habitability is whether the planet could have the conditions necessary to support liquid water. An illustration representing the legacy of NASA's Kepler space telescope. After nine years in deep space collecting data that revealed ou...