Posts tagged universe
The Most Astounding Fact (by Max Schlickenmeyer)
This Is How Big Our Galaxy Is Compared to the Biggest Galaxy of Them All
The Milky Way is huge compared to our Sun, just one more speck of dust of the 400 billion stars in it. But, at 100,000 light years across, it’s tiny compared to other galaxies in the Universe.
It’s hard to be modest when you live in the Milky Way.
“Our galaxy is far larger, brighter, and more massive than most other galaxies. From end to end, the Milky Way’s starry disk, observable with the naked eye and through optical telescopes, spans 120,000 light-years. Encircling it is another disk, composed mostly of hydrogen gas, detectable by radio telescopes. And engulfing all that our telescopes can see is an enormous halo of dark matter that they can’t. While it emits no light, this dark matter far outweighs the Milky Way’s hundreds of billions of stars, giving the galaxy a total mass one to two trillion times that of the sun. Indeed, our galaxy is so huge that dozens of lesser galaxies scamper about it, like moons orbiting a giant planet.”