'Waterworld' super planet confirmed

Steamy planet is 2.7 times Earth's diameter and could feature exotic phenomena such as "hot ice".

    Visiting planet GJ1214b would land you in hot water, literally [AFP]

    An entirely new kind of planet dominated by water and not by rock, gas or other common materials has been identified by US scientists.

    The planet is "a waterworld enshrouded by a thick, steamy atmosphere", researchers at the Harvard-Smithsonian Center for Astrophysics said in a statement after scrutinising the planet with NASA's Hubble Space Telescope.

    "GJ1214b is like no planet we know of," astronomer Zachary Berta said. "A huge fraction of its mass is made up of water."

    GJ1214b was discovered in 2009 by the ground-based MEarth Project.

    Described as a "super-Earth," it is about 2.7 times Earth's diameter .

    Further studies in 2010 led to scientists suspecting that the planet, where the temperature is some 450 degrees Fahrenheit (232 Celsius), was largely covered in water.

    This was confirmed by Berta and his co-authors using Hubble to study the planet when it crossed in front of its host star.

    The light of the star, filtered through the planet's atmosphere, gave clues to the mix of gasses, backing up the water vapour theory.

    "The Hubble measurements really tip the balance in favour of a steamy atmosphere," Berta said.

    Further measurements and estimates led scientists to conclude that the planet has much more water than Earth and much less rock.

    That, together with high temperatures and pressure, likely produce some highly exotic results, including "hot ice," scientists say.

    Our solar system contains three basic planet types: rocky, like Earth; gas giants like Jupiter or Saturn; and ice giants like Uranus.

    SOURCE: Agencies


    YOU MIGHT ALSO LIKE

    Interactive: Coding like a girl

    Interactive: Coding like a girl

    What obstacles do young women in technology have to overcome to achieve their dreams? Play this retro game to find out.

    Heron Gate mass eviction: 'We never expected this in Canada'

    Hundreds face mass eviction in Canada's capital

    About 150 homes in one of Ottawa's most diverse and affordable communities are expected to be torn down in coming months

    I remember the day … I designed the Nigerian flag

    I remember the day … I designed the Nigerian flag

    In 1959, a year before Nigeria's independence, a 23-year-old student helped colour the country's identity.