Scientists have discovered an ocean-covered exoplanet that orbits a sun-like star. It is located at a distance of 245 light years from Earth and is a representative of a rare type, according to Science Alert..

Named TOI-733b, the planet has twice the radius of Earth and orbits a star slightly smaller than the Sun.. The rotation period is 4.9 days. Measurement of the planet's density has shown that it has either lost its atmosphere or is a world completely covered in ocean..

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Since the celestial body is very close to the star, the heat from it is likely to evaporate the atmosphere. This means that soon TOI-733b can turn into a bare stone.

According to scientists, this will help explain the unusual circumstance: why so few exoplanets are known at the moment, the radius of which exceeds the earth by 1.5-2 times..

The researchers found that the mass of TOI-733b is approximately 5.72 Earth masses, and its density is 3.98 grams per cubic centimeter.. This is more than the density of Mars, but much less than that of our planet..

While scientists can not determine the composition of the exoplanet. However, they believe that if it ever had an atmosphere of methane and helium, it has already evaporated..

But there is a possibility that it was replaced by a secondary atmosphere of heavier elements.. It is also likely that this is an ocean-covered world, and its atmosphere consists of water vapor..

Earlier, scientists from the University of California at Los Angeles announced that Earth-like planets may be much more common in the universe than previously thought.. Researchers study the formation of young exoplanets with atmospheres of hydrogen and oceans of molten magma. According to them, the presence of water on them is "