Stephenson 2-18 (also known as St2-18 or Stephenson 218) ranks among the largest known stars in the universe. This colossal red supergiant is situated in the constellation Scutum, roughly 19,000 light-years away from Earth. Its estimated radius is about 2,150 times that of the Sun—so immense that if placed at the center of our solar system, its surface would stretch past the orbit of Saturn. Despite its size, Stephenson 2-18 is relatively cool, with a surface temperature of around 3,200 K, which
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Stephenson 2-18 (also known as St2-18 or Stephenson 218) ranks among the largest known stars in the universe. This colossal red supergiant is situated in the constellation Scutum, roughly 19,000 light-years away from Earth. Its estimated radius is about 2,150 times that of the Sun—so immense that if placed at the center of our solar system, its surface would stretch past the orbit of Saturn. Despite its size, Stephenson 2-18 is relatively cool, with a surface temperature of around 3,200 K, which
2M viewsApr 25, 2025
FacebookInside History
Here is the size of our Sun vs the largest known star ☀️ Stephenson 2-18 (also cataloged as Stephenson 2-DFK 1 and RSGC2-18) is the current record holder for the largest star known, with size 2,150 times that of the Sun! Taking this estimate as correct, it would take nearly 9 hours to travel around its surface at the speed of light, compared to 14.5 seconds for the Sun. 🪐 If Stephenson 2-18 replaced the Sun in our Solar System, it would extend past the orbit of Saturn. 🌎Stephenson 2-18 is loca
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Here is the size of our Sun vs the largest known star ☀️ Stephenson 2-18 (also cataloged as Stephenson 2-DFK 1 and RSGC2-18) is the current record holder for the largest star known, with size 2,150 times that of the Sun! Taking this estimate as correct, it would take nearly 9 hours to travel around its surface at the speed of light, compared to 14.5 seconds for the Sun. 🪐 If Stephenson 2-18 replaced the Sun in our Solar System, it would extend past the orbit of Saturn. 🌎Stephenson 2-18 is loca
57.1K viewsJan 27, 2023
FacebookStar Walk
Here is the size of our Sun vs the largest known star ☀️ Stephenson 2-18 (also cataloged as Stephenson 2-DFK 1 and RSGC2-18) is the current record holder for the largest star known, with size 2,150 times that of the Sun! Taking this estimate as correct, it would take nearly 9 hours to travel around its surface at the speed of light, compared to 14.5 seconds for the Sun. 🪐 If Stephenson 2-18 replaced the Sun in our Solar System, it would extend past the orbit of Saturn. 🌎Stephenson 2-18 is loca
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Here is the size of our Sun vs the largest known star ☀️ Stephenson 2-18 (also cataloged as Stephenson 2-DFK 1 and RSGC2-18) is the current record holder for the largest star known, with size 2,150 times that of the Sun! Taking this estimate as correct, it would take nearly 9 hours to travel around its surface at the speed of light, compared to 14.5 seconds for the Sun. 🪐 If Stephenson 2-18 replaced the Sun in our Solar System, it would extend past the orbit of Saturn. 🌎Stephenson 2-18 is loca
722.4K viewsJan 27, 2023
FacebookStar Walk
Stephenson 2-18, the largest known star by radius, is an enormous red supergiant located about 19,570 light-years away in the constellation Scutum. With a radius estimated to be around 2,150 times that of the Sun, it completely dwarfs Earth—so much so that if it replaced our Sun, its surface would extend far beyond the orbit of Saturn. To put this into perspective, Earth is roughly 235,000 times smaller in radius. While Earth is just a tiny marble in cosmic terms, Stephenson 2-18 would appear as
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Stephenson 2-18, the largest known star by radius, is an enormous red supergiant located about 19,570 light-years away in the constellation Scutum. With a radius estimated to be around 2,150 times that of the Sun, it completely dwarfs Earth—so much so that if it replaced our Sun, its surface would extend far beyond the orbit of Saturn. To put this into perspective, Earth is roughly 235,000 times smaller in radius. While Earth is just a tiny marble in cosmic terms, Stephenson 2-18 would appear as
4.8K viewsMay 4, 2025
FacebookSpace Cameo
The mind-boggling size of the largest known star, Stephenson 2-18
The mind-boggling size of the largest known star, Stephenson 2-18
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boingboing.net
Comparing Earth to the largest known star(Stephenson 2-18)
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Comparing Earth to the largest known star(Stephenson 2-18)
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redditboingggoesmyschlong
The star shown in this visualization is based on current estimates for Stephenson 2-18 a red hypergiant located roughly 20,000 light-years from Earth, deep inside the Milky Way. It is considered one of the largest stars ever measured by radius. If placed at the center of our Solar System, its surface would extend beyond the orbit of Jupiter. At that scale, Earth would be effectively invisible. Stephenson 2-18 was identified inside a dense star cluster and studied primarily using infrared observa
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The star shown in this visualization is based on current estimates for Stephenson 2-18 a red hypergiant located roughly 20,000 light-years from Earth, deep inside the Milky Way. It is considered one of the largest stars ever measured by radius. If placed at the center of our Solar System, its surface would extend beyond the orbit of Jupiter. At that scale, Earth would be effectively invisible. Stephenson 2-18 was identified inside a dense star cluster and studied primarily using infrared observa
4.2K views3 months ago
FacebookSomewhereinSpace
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This animation shows how Earth compares to Stephenson 2-18, the largest known star, highlighting their huge size difference. It shows just how tiny we are in the universe. We kept the scales precisely in proportion, and our computer struggled to process the animation due to the enormous scale difference! | The Brain Maze
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Cosmic Byte on Instagram: "A scale comparison of Earth, the Sun, the red supergiant Stephenson 2-18, and the supermassive black hole TON 618 illustrates the vast differences in size and cosmic scale within the universe. Earth is a terrestrial planet with a diameter of about 12,742 km and serves as a reference for human scale. The Sun is a G-type main-sequence star with a diameter of roughly 1.39 million km and contains over 99.8% of the mass of the solar system. Stephenson 2-18 is among the larg
34.1K views5 months ago
Instagrambyteme_98
Comparing Earth to the Largest Known Star (Stephenson 2-18) YouTube - @skyboundcuriosity #comparison #earth #largest #giant #star #cosmic #contrast #size #universe #celestial #stellar #earthvsstar #stephenson2-18 #space #astrophysics #scale #dimensions #body #galactic #astronomical #discovery #zoom #educational #illustration #curiosity #astronomy #fyp #aesthetic #short #viral
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