Cosmic bubble wrap 🫧⁣ ⁣ 7,100 light-years from Earth in the constellation Cassiopeia lies the Bubble Nebula – a seven-light-year-across nebula – with a star 45 times more massive than our own.⁣ ⁣ Gas on the star gets so hot that it escapes into space at a speed of 4 million miles per hour (6.4 million kilometers per hour); when the hot “stellar wind” meets the surrounding frigidness of space, it folds and forms an outer edge.⁣ ⁣ Dense columns of cool hydrogen gas and space dust can be seen in the upper left and center of the photo. @NASAHubble’s Wide Field Camera-3 depicts this nebula in visible light and shows off its brilliant colors: hydrogen is green, oxygen is blue, and nitrogen is red. The star is about 4 million years old and will become a supernova in 10-20 million years.⁣ ⁣ Image description: In the upper left of the image, yellow and gold clouds transition to green as they meet the blackness of space. At the center, a blue and green bubble emanates with a bright pink star with yellow clouds adjacent to it. ⁣ ⁣ Credit: NASA, @EuropeanSpaceAgency, and the Hubble Heritage Team (STScI/AURA) ⁣ ⁣ #Nebula #Space #NASA #Hubble #AstroPhotography #Supernova