What is the Heart shaped region on Pluto- Tombaugh Regio

Nick named The Heart, Tombaugh Regio is the brightest surface on Pluto, the distant Dwarf Planet of our solar system. This light colouerd area was first identified by the ambitious Nasa Space Project- The New Horizons which was launched from Earth in January 2006 with an aim to study Pluto, its five moons and the Kuiper Belt. The New Horizons provided the first ever photograph of our Dwarf Planet member of our Solar System.

This Heart shaped region is 1590 kms across and is still referred to as "The Heart" by Nasa owing to its shape resemblance. This region however was later named as the Tombaugh Regio after Clyde Tombaugh, the scientist who discovered Pluto and Regio is the latin for the word "region".

The two lobes of the heart are geologically different from one another. The surface on the left lobe is smoother and brighter than the right one. The left lobe has been named as the Sputnik Planum and was earlier considered to be plain due to a probable impact crater now stuffed with nitrogen ice but the pictures released on 15th July from the New Horizons Mission, revealed 3400m lond mountain ranges made up of ice and also there was no sign of craters. Most of the shiny part of the Hearth is estimated to be 100 million years old and as compared to the 4 billion years old history of Solar System these part are very new in origin, hence, concluding that Pluto is geologically active.