An international team of scientists from Canada, France and other countries wrote in the latest issue of the Astronomical Journal that they have discovered a new super-Earth with a mass about five times that of the Earth, 30% of which is water. Orbiting a small star in the Draco constellation about 100 light-years from Earth, it may be an “ocean planet” completely covered in water.
The leader of the latest study, scientist Charles Cardeau of the University of Montreal, said that the exoplanet is slightly larger and heavier than the Earth and is at a moderate distance from its star, which makes it neither too hot nor too hot. would be too cold for liquid water to exist on its surface.
The research team measured the system using a SPIRou polarimeter. SPIRou is a new spectropolarimeter developed for the Canada-France-Hawaii Telescope. It is mainly used to detect exoplanets and study newly formed stars and planets. Measurements show that the planet is almost 5 times more massive than Earth.
Further analysis showed that TOI-1452b may be a rocky planet like Earth, but its radius, mass and density data show that it is very different from Earth. Earth is essentially a very dry planet, and although people sometimes call it the blue planet because about 70% of its surface is covered by oceans, water actually makes up less than 1% of Earth’s mass. The water in TOI-1452b may account for 30% of its mass. This proportion is similar to some natural satellites in the solar system, such as Ganymede, Callisto, Titan, and Enceladus. It may be an “ocean planet” ”, a planet completely covered by a thick layer of water.
In recent years, astronomers have determined the radii and masses of a number of exoplanets that are between Earth and Neptune in size (about 3.8 times the size of Earth). The densities of some of these planets indicate that a significant portion of their mass consists of lighter materials (such as water) than the materials that make up Earth’s interior structure. These objects are called “ocean planets.”