The farthest exoplanet ever discovered

Exoplanets are planets outside our solar system.
So far, astronomers have identified 4,800 planets orbiting other stars in our own Milky Way galaxy. They are all about 3,000 light-years from Earth. But for the first time, NASA has discovered a planet outside the Milky Way. The discovery was made using NASA’s Lunar X – ray Observatory.

The planet was discovered 28 million light-years away in Whirlpool, a spiral galaxy known as Messier 51 (M51). It orbits a neutron star or a black hole twice as far from Saturn as the Sun. Researchers estimate that the M51-ULS-1b exoplanet will be approximately the size of Saturn. The orbit of this planet is about 70 Earth years.

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