Galaxies in our universe fall in a range of sizes, such as the giant IC 1101 that is 50 times the size of the Milky Way and is estimated to last 8 million light years – hence it is known as the Godzilla Galaxy. At the other end of the scale, you can find relatively small galaxies that can be small light years of about 2, such as the tiny Seg 2.
But the fact that a galaxy is small does not mean that it is not of scientific interest, as this image of the dwarf galaxy Sextance B shows. 4.5 million light-years away and with a mass equal to 200 million times the mass of the Sun, the dwarf galaxy is only a few thousand light-years in diameter. But despite this, it squeezes a whole series of astronomical events into its relatively small size.
The most obvious features are bright red clouds near the center of the image which are made up of hydrogen. These are the birthplace of stars, where clouds collide and eventually create a gravitational pull that creates a new star.
The galaxy has not only starry nurseries, but also their cemeteries, as planet nebulae. Sextance B is notable for being one of the smallest galaxies containing planetary nebulae, which are beautiful ring-like structures that form when a red giant star reaches the end of its life, although they are not visible in the image Give. As a star runs out of fuel, it throws away its outer layers that form elaborate structures in space.
Nicholas U. at Kit Peak National Observatory. The image was taken using the Mayol 4-meter telescope, and as well as Sextance B. It shows many other galaxies in the background that appear fuzzy, as well as stars in our galaxy that are located very close to us and therefore radiant glow.