By cosmic standards (at least in our narrow understanding of things which is not saying a lot) it is very close at only 41 light years.  And heere is a bit more about this unusual exoplanet and when they spotted it for the first time:

55 Cancri e, a world 41 light-years from our own, was discovered way back in 2004. It was notable for being the first super-Earth – a planet with a mass exceeding our own world’s but not reaching that of Neptune’s – that was orbiting around a main sequence star. There’s an ongoing debate as to the composition of the planet, which some have proposed to be mostly carbon in the form of diamond.

When astronomers focus more of their telescope resources on it, there may be a clarification to this question!

And check out this video we hope you like it.

thanks to iflscience.com for the great info

thanks to NASA for the pic