THE WOODLANDS, TEXAS — A young, ultrabright Jupiter may have desiccated its now hellish moon Io. The planet’s bygone brilliance could have also vaporized water on Europa and Ganymede, planetary ...

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According to new research, the frozen dwarf planet Pluto may have started its life as a hot world with a massive underground ocean of liquid water — suggesting, tantalizingly, that it could have ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. Today, the dwarf planet Pluto orbits the sun ...

The accretion of new material during Pluto's formation may have generated enough heat to create a liquid ocean that has persisted beneath an icy crust to the present day, despite the dwarf planet's ...