Scientists from NASA and amateur astronomers have found a pair of brown dwarfs, the composition of which is very different from the same celestial bodies. This may mean that in space there are exoplanets with a similar composition.
New substellar objects are brown or brown dwarfs that have much in common with stars. However, these gaseous bodies do not have enough mass to start nuclear fusion, so they look more like small planets rather than stars.
At the same time, the pair is the brown dwarfs most similar to the planets, which can be observed in the oldest population of stars of the Milky Way, NASA officials said in a statement. They can help researchers learn more about planets outside the solar system. Researchers studied them using data from NASA missions. The objects were named WISE 1810 and WISE 0414.
When scientists studied them, they were surprised to see that these two brown dwarfs have very little iron compared to what is usually seen in brown dwarfs. This suggests that they are very old. A pair of celestial bodies, according to NASA estimates, is about 10 billion years old, and their total mass is about 75 times the mass of Jupiter.
If these brown dwarfs were formed with a low metal content, then the researchers are sure that there are ancient exoplanets with the same composition. Therefore, researchers will begin to search for old low-metal exoplanets or other galaxies that revolve around ancient low-metal stars. Further studies of this population of brown dwarfs could provide answers to questions about how much the process of planet formation depends on the mass of metals in the composition.