Several lines of thought indicate that the outer galaxies It must host planetary systems. However, their discovery would be impossible with the methodologies used by scientists in our region Milky Way. Now, a group of astronomers has found another way and claims to have found it The first planet outside the Milky Way.
The alternative that a team of researchers from the United States, China and Australia has found is the study X-ray temporal behavior Emitted by light sources of outer galaxies. They found that they could detect a “temporary eclipse” of those emissions. These scattered obstructions occur every time a planet crosses its orbit in front of an X-ray emitting source.
And so they claim to have found The first extra galactic planet. Their research was published in the journal Nature Astronomy.
located in vortex galaxy (popularly known as M51 according to Messier’s catalog) 28 million light-years away, the object was discovered from an X-ray binary obscurity, a system where A star twenty times larger than the sun orbiting another neutron star or Black hole.
According to NASA, the planet could be the size of Saturn and orbit around a neutron star or black hole twice the distance between Saturn and our sun.
The first known exoplanet was discovered in 1992. Since then, 4,538 extrasolar worlds have been confirmed; However, they all meet one condition: they are less than 3,000 light-years from Earth, within our Milky Way galaxy.
Most of the known extrasolar planets are gas giants Equal to or greater than Jupiter, with orbits very close to its star and very short orbital periods, it is also known as hot Jupiter. However, this is believed to be a result of information bias generated by current detection methods, which Finding planets this size more easily of the smaller terrestrial planets.
All in all, exoplanets are comparable to our planets They started revealing itAs the possibilities of methods and study time increase. The The first additional solar system Discovered with more than one planet was Upsilon Andromedae.