The findings, which imply that molten planets may be quite common, suggest astronomers may need to be more cautious about designating exoplanets as potentially habitable. New Delhi: Astronomers say they may have identified an entirely new type of planet—one that does not fit into the familiar categories of rocky worlds or ocean planets, but instead exists as a churning, molten, mushy, molasses-like mass. Until now, pl... [3672 chars]