The estimated radius is about 2,150 times that of the Sun, and the volume is 10 billion Suns. If Stephenson 2-18 replaced the Sun in the solar system, its photosphere would extend beyond the orbit of Saturn.
It would take earth's fastest jet over 500 years to travel around. It would take almost 9 hours at the speed of light.
Our universe is FULL of strange and surprising things.
And luckily, our Hubble Space Telescope is there to be our window to the unimaginable! Hubble recently ran into an issue with its payload computer which controls and coordinates science instruments onboard the spacecraft. On July 16, teams successfully switched to backup hardware to compensate for the problem! A day later, the telescope resumed normal science operations.
To celebrate, we’re taking you back to 2016 when our dear Hubble captured perhaps one of the most intriguing objects in our Milky Way galaxy: a massive star trapped inside a bubble! The star inside this Bubble Nebula burns a million times brighter than our Sun and produces powerful gaseous outflows that howl at more than four million miles per hour.
Based on the rate the star is expending energy, scientists estimate in 10 to 20 million years it will explode as a supernova. And the bubble will succumb to a common fate: It’ll pop.