According to reports, Pluto is bigger than what was thought earlier. It is approximately two-thirds the size of Earth’s moon. It is estimated that the dwarf planet’s surface area is comparable to Russia. The finding is considered important for the reason that it indicates that the world is less dense than what was thought earlier. This indicates that it was having less rock and more ice.

As per reports, many parts of Pluto are without craters and the characteristic heart-shaped region, called as Tombaugh Regio consists of smooth plains lacking craters. Prehistoric surfaces in the solar system, for example those on the moon, are having craters that are from the time when the planets were created 4.6 billion years ago.

It was thought that the dwarf planet’s surface was also ancient, however Tombaugh Regio could just be approximately 100 million years old. It means young in geological terms.

Internal heat source of Pluto is still not known. Pluto requires internal heat in order to soften or melt the surface to remove the craters. It is considered that the dwarf planet is too small to produce much radioactive heat, and is also not compressed by a larger world for generation of tidal energy, like what takes place between Jupiter and its moons and Europa.

As per reports, atmosphere of the dwarf planet is disappearing Radio waves that are beamed from Earth and they pass through tenuous atmosphere of Pluto. These waves were detected by New Horizons. It indicates that the pressure is only 1/100-thousandths that of atmosphere of Earth at sea level.