Astronomers have discovered a very rare, very unusual planet in a distant solar system. The planet, called NGTS-4b, is three times the size of Earth, and about 20 percent smaller than Neptune. It's hotter than our very own Mercury. At about 1,000 degrees Celsius, it would be the hottest planet if it were in our Solar System.
But what really separates this planet is its location. It's located in what's called the Neptunian Desert.
Astronomers employ the term "Neptunian Desert" to describe a region in solar systems so close to the star that the star's energy would strip away the atmosphere from any planet in the desert. Since Neptune is a gas giant, basically just one big atmosphere with only a very tiny rocky core, Neptune couldn't exist there. Hence the name, the Neptunian Desert.