Liked on YouTube: The Biggest Stars In The Universe And How We Measure Them!

The Biggest Stars In The Universe And How We Measure Them!
There are many different types of stars out there; some bigger, some smaller than our own Sun which is technically a yellow dwarf. However, it’s crucial to know that stars don’t have nice, tidy boundaries. They don’t have a rigid surface like a rocky planet or moons. Instead, these atomic fireballs have pretty diffuse surfaces as the super-heated mass of gas that makes them up slowly thins out into space voids. What astronomers use in lieu of a surface is a star’s photosphere that’s the level at which the star becomes transparent. Therefore, a star’s surface means its photosphere. Another important thing to keep in mind is that the volume of any star can’t be directly measured, there are various methodologies to do that. Curious to learn more about how we measure volumes of stars and the biggest stars in the universe? ------------------------------------------------------------------------------------------- Subscribe for more videos:https://www.youtube.com/c/InsaneCuriosity?sub_confirmation=1? Business Enquiries: Lorenzovareseaziendale@gmail.com ------------------------------------------------------------------------------------------- 1- The largest one spotted in the universe so far is UY Scuti, a star 9,500 light-years away, close to the center of the Milky Way in the constellation Scutum (meaning ‘shield’). It’s a dust-enshrouded red supergiant (the largest class of stars out there) that’s around 1,700 times larger than our Sun in diameter. 2- WOH G64 (1,504 to 1,730 solar radii) — a red hypergiant star in the Large Magellanic Cloud in the constellation Dorado (in the southern hemisphere skies) located about 170,000 light-years away from Earth. This star’s brightness varies over time due, in part, to a torus-shaped cloud of dust that obscures its light. 3- Mu Cephei (around 1,650 solar radii) — a red supergiant in the constellation Cepheus, 9,000 light-years from Earth. With more than 38,000 times the Sun’s ​luminosity, it’s also one of the brightest stars in the Milky Way. It appears garnet red and is located at the edge of the IC 1396 nebula. Since 1943, the spectrum of this star has served as the M2 Ia standard by which other stars are classified. Mu Cephei is nearing deat*. 4- V354 Cephei (1,520 solar radii) — a red hypergiant in the constellation Cepheus. V354 Cephei is an irregularly variable star, which means that it pulsates on an erratic schedule. It was referred to only by its listings on relatively obscure catalogs. It is too faint to be included in catalogs such as the Henry Draper Catalogue or Bonner Durchmusterung. 5- RW Cephei (1,535 solar radii) — an orange hypergiant in the constellation of Cepheus; RW Cephei is also a semi-regular variable star of type SRd, meaning that it is a slowly varying yellow giant or supergiant. The visual magnitude range is from 6.0 to 7.3. 6- Westerlund 1-26 (1,530 to 2,550 solar radii). That’s quite a large estimate interval; if the upper estimate is correct, it would dwarf even UY Scuti, and its photosphere would reach farther than Saturn’s orbit. Westerlund 1-26 stands out as its temperature varies over time, but not its brightness. 7- KY Cygni (1,420 to 2,850 solar radii) — a red supergiant in the constellation Cygnus. The upper estimate is viewed with skepticism as a likely observational error, while the lower one is consistent with other stars from the same survey and with our understanding of stellar evolution. 8- VY Canis Majoris (1,300 to 1,540 solar radii) — a red hypergiant star that was previously estimated to be 1,800 to 2,200 solar radii, but that size put it outside the bounds of stellar evolutionary theory and were updated. A hypothetical object travelling at the speed of light would take 6 hours to travel around the star's circumference, compared to 14.5 seconds for the Sun. 9- Betelgeuse (950 to 1,200 solar radii) — a red supergiant in the constellation Orion. Betelgeuse is one of the most well-known stars of its kind, as it’s the ninth-brightest star in the sky and can easily be seen with the naked eye between October through March on a clear night. It’s the closest star to Earth on this list and is expected to go.. ------------------------------------------------------------------------------------------- "If You happen to see any content that is yours, and we didn't give credit in the right manner please let us know at: Lorenzovareseaziendale@gmail.com and we will correct it immediately" "Some of our visual content is under a Attribution-ShareAlike license. (https://ift.tt/1jttIpt) in it’s different versions such as 1.0, 2.0, 3,0 and 4.0 – permitting comercial sharing with attribution given in each picture accordingly in the video." Credits: Ron Miller Credits: Nasa/Shutterstock/Storyblocks/Elon Musk/SpaceX/Esa Credits: Flickr credits: image editor/ Robin Zebrowksi/ Howard Lifshitz (cc by 2.= Credits: NASA's goddard space center #InsaneCuriosity #TheBiggestStarsInTheUniverse #TheSunAndTheOtherStars
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