There may be more Earth-like planets than grains of sand on all our beaches. The Sun belongs to a galaxy called the Milky Way. It is estimated that there are at least between 200 - 400 BILLION planets in our Milky Way Galaxy alone! Stars are not scattered randomly through space, they are gathered together into vast groups known as galaxies. How many planets are there in the universe? The observable universe appears to go back in time by about 13.8 billion years, but beyond what we could see there could be much, much more. Planets are made up of mostly the same things as stars and moons, and with millions upon billions of them (we believe), it really is mind boggling to try and understand how many planets there are in the universe. Hipparcos mapped millions of stars in our galaxy, but how many more are there? But, on average, astronomers think there is one planet for every star in our galaxy. Planets. Disregard universe, if we somehow managed to ask you what number of planets are there in our close planetary system, will you have the capacity to think of an answer that you can make certain of? The universe is vast, and several mysteries need to be unraveled about the vast body. We might do that by measuring the surface area of the beach, and determining the average depth of … To keep going with our estimates, this would make the number of planets in the universe 10 million times 2 quadrillion (the estimate of the number of planets in the Virgo Supercluster), which comes to 21.6 sextillion . So how many stars are there in the Universe? A diagram showing the planets of our Solar System. Scientists have worked out just how many planets like our own might be waiting out in the universe. Forget universe, if we were to ask you how many planets are there in our solar system, will you be able to come up with an answer that you can be sure of? There are eight planets in our solar system: Mercury, Venus, Earth, Mars Jupiter, Saturn, Uranus, and Neptune. The Virgo Supercluster is then one of about 10 million superclusters in the observable universe ( source ). How Many Planets In The Universe? how many planets there will be, and we also wonder, how many have living beings. How Many Planets Are There in the Solar System? It has been said that counting the stars in the Universe is like trying to count the number of sand grains on a beach on Earth. On the off chance that somebody asked you at the present time, what number of planets are there in the universe, what might your answer be? Some stars have many planets, and some have none. It is easy to ask this question, but difficult for scientists to give a fair answer! There is an equation to calculate the number of existing civilizations, but I will not focus on those aspects, since I am not a mathematician, and in that equation there are many unknown parameters and they are only suppositions, that equation is the Drake equation.