Total Planets Discovered: 3,725
Total Planets Listed in Our Atlas: 477
Estimated Earth-Sized Planets in Milky Way Galaxy: 100 Billion
Earth-Sized Planets Discovered: 362
Earth-Sized Planets Listed in Our Atlas: 43
Super Earth-Sized Planets Listed in Our Atlas: 141
Estimated Earth-Like Planets in Milky Way Galaxy: 10 Billion
Truly Earth-Like Habitable Planets Discovered: 0
Milky Way Galaxy Star and Planet List
Many of us wonder how many planets are in the Milky Way? MilkyWayGalaxyAtlas.com is dedicated to providing the most comprehensive visual list of solar systems, new exoplanets, and earth like planets in the Milky Way Galaxy. Our list of planets and stars contains detailed information and visual depictions of each star and planet. Solar systems consist of one or more stars at the center, and can have planets rotating around those stars in orbits. Our Solar System is named after our Sun. Our Sun is named Sol. Thus, the term "solar" is named after our Sun. Planets that are found outside of our Solar System are known as "exoplanets." We have created a map of the galaxy to show you where the Sun is located in Milky Way Galaxy.
Most of us are fascinated by the concept of new planets or worlds being discovered in our galaxy. We naturally look up at the stars at night and wonder about how many planets there are in our galaxy, which is known as the Milky Way Galaxy. There are many new planets that have already been discovered in our galaxy! The type of planets that are being found are very diverse. Some are very different from any planet that is in our solar system. We have created a galaxy legend for stars and planets to show you how they are classified. There are 8 major types of planets that are being discovered. These planets are categorized by size and are as follows: Asteroidans (Ceres and Vesta), Plutonians (Pluto), Mercurians (Mercury), SubTerrans (Mars), Terrans (Venus and Earth), Super Terrans (Planet 9), Neptunians (Uranus and Neptune), and Jovians (Jupiter and Saturn). Some of these planet types are unique to our Milky Way Galaxy atlas, specifically Asteroidans and Plutonians. These planet types are a natural extension of the other planet types. In addition to being categorized by size, the planets that have been found are also categorized according to their temperature and potential habitability. The stars and planets in our list are listed according their the distance in light years (LY) from our Solar System. As an example, at the top of the page, it says "0 to 100 LY." This is a list of all of the stars and planets that are located 0 to 100 light years away from our Solar System. A light year is defined as the distance that light travels in one Earth year, or 5.88 trillion miles. Light travels so fast, that a beam of light would travel around Earth 7 times in 1 second!
As scientists discover more and more planets, we are learning that planets are to be found everywhere throughout the Galaxy. Planets seem to be very common throughout the Galaxy! With the intense pace of planet discoveries, many people have begun to wonder if all stars have planets. We are still in the process of being able to answer that question. However, given the large amount of planets that are being discovered, it is estimated that 75% of all stars have planets! It seems that our galaxy is teeming with planets, and possibly life. Every day it is looking like our galaxy is more and more like the fictional galaxies of Star Wars or Star Trek. Someday we hope to gain the ability to travel to these amazing new worlds! According to our current knowledge, the Milky Way Galaxy is also home to the only known life in the Universe - Humans on planet Earth! However, we are certain that intelligent life other than us exists in the Universe. We just have to find it!
As the list of known stars and planets in the Milky Way Galaxy grows, we will continue to update our planet list with the latest discoveries. Please take the time to explore the Milky Way Galaxy using our extensive planet list, and be sure to check back often for new exciting star and planet updates.
What is the Milky Way Galaxy?
The Milky Way Galaxy is one of many billions of galaxies found throughout the known Universe. The Milky Way is the galaxy where our solar system is located. It is one of many spiral galaxies in the Universe. The Milky Way Galaxy is a medium-sized galaxy with a diameter of 120,000 light years across. The Milky Way is also between 10 and 13 billion years old. The Milky Way Galaxy is made of billions of stars and planets and is full of gas and dust. Our Solar System is located about 26,000 light years from the center of the galaxy. The Milky Way contains over 400 billion stars.
Where is the Milky Way Located?
The Milky Way Galaxy is located in an area of the universe known as the Local Group of Galaxies. The Local Group is comprised of more than 50 galaxies. The Local Group has a diameter of 10 million light years. The Local Group of Galaxies is located within the Virgo Supercluster of Galaxies. The Virgo Supercluster contains over 100 groups of galaxies and has a diameter of 110 million light years. The Virgo Supercluster is one of millions of Galaxy Superclusters found throughout the Universe.
How many Earth-like planets are in the Milky Way Galaxy?
Have you ever wondered if there are planets like Earth in our Milky Way Galaxy? It is estimated that there are 10 Billion Earth-like planets in the galaxy. While there are several Earth-size planets that have already been found in the Milky Way, we have not yet discovered an Earth-like planet. While a true Earth twin has yet to be found, there are some Earth-size planets that are similar in size to Earth. However, none of the Earth-size planets that we have found are considered truly similar to Earth. For a definition of what criteria a planet must have in order to be considered Earth-like, please explore our Galaxy Legend. Do not be misled by media reports saying that we have found an Earth-like planet. All of the planets that we have found that have been supposedly Earth-like are subjected to intense radiation and solar flares from their parent stars and are tidally locked (one side of the planet always faces its star). Given the intense radiation and solar flares they are receiving, it is believed that their atmospheres could have been stripped away, leaving them uninhabitable. One example of this is Proxima b. Proxima b orbits an M-Class star. While it orbits within the habitable zone, it is tidaly locked with the Proxima Centauri Star, and receives intense solar flares from the star. When searching for Earth-like planets, we are focused on finding an Earth-sized planet in the habitable zone of a G-type star like our Sun. That is not to say that habitable planets can only be found around G-type stars. Many other different star types could host habitable planets. However, in our search for "Earth-like" planets, we should be cautious about our definition.
What is an Earth Analog?An Earth Analog is defined by us as a planet that has met 11 critical criteria. These criteria are as follows: it must be located within the Habitable Zone of its parent star (the area where liquid water has the potential to exist), it must not be tidally locked with its parent star, it must not be subjected to strong or intense solar flares from its parent star (flares must be moderate or less), it must be a Terran Size Class, it must have a Terran Mass between 51% and 159% that of Earth, it must have an Average Density Range between 3.50 and 7.50, it must have a Diameter between 6,334 to 10,214 Miles, it must have an Atmospheric Pressure between 80% and 120% that of Earth, it must have a breathable atmosphere like Earth, it must have an average global temperature between 50 and 100 Degrees Fahrenheit (Warm Climate), and it must have liquid water on its surface. This definition can also be found in our Galaxy Legend.
Is there another Planet with Life?We simply do not know for sure if there is life on other planets. We hope that there is life on other planets. Given the number of possible Earth-Like planets in the Galaxy and the chance of advanced intelligent life evolving on one of these planets, it is estimated that there could be as many as 15,000 intelligent alien civilizations throughout the Galaxy! However, that is just an estimate. There could be many more intelligent aliens than that. There is the possibility that there could be millions of intelligent alien civilizations in the Milky Way Galaxy.
What does our Solar System consist of?The solar system consists of the Sun, also known as Sol. The Sun is orbited by 8 major planets. These planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. There is an asteroid belt between Mars and Jupiter. Beyond Neptune is the Kuiper Belt. One of the Kuiper Belt objects is Pluto.
What is at the Center of the Galaxy?One of the amazing secrets of the galaxy, is the fact that all of these billions of stars and planets are rotating around the center of the galaxy. A supermassive Black Hole is at the center of the Galaxy ! It contains the mass of 4.5 million of our Suns and is known as Sagittarius A. It is believed that this black hole formed first, and spawned the creation of stars and planets. Thus the black hole was the catalyst to create our Milky Way Galaxy. It is also believed that a supermassive black hole lies at the center of every galaxy in the universe!
Milky Way Galaxy Habitability
Habitable Zone Ring from the Milky Way Galactic Center (Kiloparsecs):
4 to 10
Habitable Zone Ring from the Milky Way Galactic Center (Light Years): 13,046 to 32,615
Distance between our Sun and Milky Way Galaxy Center (Light Years): 26,000
Milky Way Galaxy Properties
Galaxy Classification: Barred Spiral
Galaxy Age: 13.2 Billion Years
Galaxy Mass: 1.250 Trillion Solar Masses
Galaxy Star Density: 1 Star per 284 cubic Light Years
Galaxy Radius (Light Years): 60,000
Galaxy Diameter (Light Years): 120,000
Galaxy Central Bar Length (Light Years): 25,000
Galaxy Central Black Hole Mass: 4.5 Million Solar Masses
Milky Way Galaxy Spiral Arms: Scutum-Centaurus Arm, Sagittarius Arm, Perseus Arm, Outer Arm, *Orion Spur
* Our Solar System is located within the Orion Spur
Milky Way Galaxy Stars
Estimated Number of Stars in the Milky Way Galaxy: 400 Billion
Estimated Number of Star Systems in the Milky Way Galaxy: 100 Billion
Estimated Number of O Stars in the Galaxy (0.00003%): 12 Million
Estimated Number of B Stars in the Galaxy (0.125%): 500 Million
Estimated Number of A Stars in the Galaxy (0.625%): 2.5 Billion
Estimated Number of F Stars in the Galaxy (3%): 12 Billion
Estimated Number of G Stars (Sun-like) in the Galaxy (7.5%): 30 Billion
Estimated Number of K Stars in the Galaxy (12%): 48 Billion
Estimated Number of M Stars in the Galaxy (75%): 300 Billion
Estimated Number of L Dwarfs in the Galaxy (0.3%): 1.2 Billion
Estimated Number of T Dwarfs in the Galaxy (0.3%): 1.2 Billion
Estimated Number of Y Dwarfs in the Galaxy (0.4%): 1.6 Billion
Estimated Number of White Dwarf Stars in the Galaxy (0.5%): 2 Billion
Milky Way Galaxy Planets
Estimated Number of Planets in the Milky Way Galaxy: 3 Trillion
Estimated Number of Gas Giant Planets in the Galaxy: Unknown
Estimated Number of Earth-Sized Planets in the Galaxy: 100 Billion
Estimated Number of Earth-like Planets in the Galaxy: 10 Billion
Total Number of Solar Systems Confirmed: 2,588
Total Number of Planets Discovered in the Galaxy: 3,472
Number of Gas Giant Planets Discovered in the Galaxy: 1,050
Number of Ice Giant Planets Discovered in the Galaxy: 1,267
Number of Super Earth Planets Discovered in the Galaxy: 783
Number of Earth-Size Planets Discovered in the Galaxy: 359
Milky Way Galaxy Civilizations
Estimated Number of Advanced Civilizations in the Milky Way Galaxy: 4,600 to 15,785
Number of Advanced Civilizations Discovered in the Milky Way Galaxy: 1 (Humans)
Are we ready to discover and meet an Alien Civilization?