Planet from another galaxy discovered for the first time!

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Since many years scientists have been trying to detect planets outside of Milky Way Galaxy but it was quite hard to detect that as they are very small things situated so far away.

Astronomers used NASA's Chandra X-ray Observatory to probe for planets in a galaxy a little closer to us - roughly 3.8 billion light-years away - using microlensing from the quasar. These planets range in size from Earth's moon to the planet Jupiter.

Leading researcher of the study, Xinyu Dai said in a statement that, "We are very excited about this discovery".

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Until now, scientists haven't detected any planets outside of our own Milky Way Galaxy - it's simply been too hard to discern such small things from so far away.

"These small planets are the best candidate for the signature we observed in this study using the microlensing technique", Dai said. Directly viewing exoplanets within the Milky Way is almost impossible, so astrophysicists have to sift through data and use other detection techniques that give way to evidence of planet signatures. 'This is the first time anyone has discovered planets outside our galaxy. The team then applied a formula to the data they gathered and determined that the only explanation for the particular energy signatures they were seeing was the presence of thousands of planets.

The technique was first used to first identify planets outside of our Solar System but inside the galaxy, known as exoplanets.

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Analyzing any of the planets discovered within this study would be a concrete impossibility using existing telescope technologies. After all, our galaxy is a warped disc about a hundred thousand light-years across and a thousand light-years thick, so it's incredibly hard to see beyond that. However, researchers at the University of Oklahoma used gravitational microlensing, which is a powerful technique, which was also predicted by Albert Einstein's theory of general relativity. But they were still able to use their calculations to estimate the number of planets and masses.

Guerras called the study "cool science". These newly-discovered extragalactic planets, however, are located some 3.8 billion years away.

Eight years after it launched, NASA says the telescope has them believing there could be at least one planet orbiting every single star in the sky.

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In the university's announcement, Guerras said "there is not the slightest chance of observing these planets directly" because of the distances involved.