Astronomers may have spotted a planet in another galaxy for the first time | Engadget

The planet's large orbit could rule out another transit for roughly 70 years, and it wouldn't be clear exactly when astronomers would have to take a look. That's also assuming the 'living' star doesn't explode and bathe the planet in radiation.If there's ever a confirmation, though, the discovery would be very significant. The team noticed dips in X-ray brightness that hint at a planet transiting in front of a star in the Messier 51 (aka M51) galaxy 28 million light-years away. A planet, however, would line up with the data.The challenge, as you might guess, is verifying that data. Astronomers using NASA's Chandra X-ray Observatory have detected what might be the first signs of a planet in another galaxy. As the researchers had to focus on X-ray bright binary systems where the region of bright rays is relatively tiny, the transit was considerably easier to spot. The three-hour transit of this planet candidate didn't provide a large window.
The hunt for exoplanets is venturing beyond the Milky Way. Astronomers using NASA's Chandra X-ray Observatory have detected what might be the first signs of a planet in another galaxy. The team notic… [+1770 chars]