An Earth twice as spacious is impossible, because astronomers have just found a deadly desert planet..
CC rocky planets outside the solar system with similar living conditions to Earth have been found in space, but fewer than expected because exoplanets of this size are often too small and faint to be observed.
A more feasible size to study – twice the size of Earth – has never been found. A group of scientists from Rice University in Texas, the University of California in Los Angeles (USA) and the Max-Planck Institute for Astronomy Königstuhl (Germany) found an explanation in research that comes to be published in the journal. Letters from the astrophysical journal.
Scientists have just discovered the reason for the absence of certain expected planets
Scientists have just found the reason for the absence of some expected planets – (Photo: NASA/JPL-Caltech)
Based on the massive data collected by telescopes around the world, they built a spectacular model of planet formation, showing the common migration of young planets.
This has been mentioned in studies of the solar system, in which kThe most certain migrant is Jupiter: Approached the Sun in its early days, contributing to the formation of small planets between it and the Sun, including Earth.
But new supercomputer simulations also show that the inward migration of the giant dust and gas disk planets of an early star system also leads to a catastrophic consequence: the planets collide with each other, s kill each other – and if they are lucky, will merge into new ones. worlds.
“The migration of young planets toward their stars creates overpopulation and frequently leads to cataclysmic collisions that separate the planets from their hydrogen-rich atmospheres.” – said Dr. Andre Izidoro from Rice University in Texas, a member of the research team.
Research citation, fact sheet Space said this process transformed the worlds into two types of planets: a group of rocky planets about 1.4 times the size of Earth or smaller; Another group is made up of small Neptune-like gas planets, with a radius 2.4 times the radius of Earth.
The small types are planets that have been stripped of their hydrogen rich atmosphere and have become rocky planets, the large types are lucky to escape although they can also be hit but the atmosphere is still sufficiently thick to still be a gas planet.
Our Earth may have originated this way, with the hypothesis of a collision 4.5 billion years ago between a separate early Earth and a Mars-sized planet, Theia, almost certainly proven. This collision is thought to have ejected a mass of material which was then clumped together on the Moon.
But it is clear that despite this deadly start, the Earth can still live.
The new research also shows that separating two distinct types of planets creates one. “desert of death” – a region without any planets between 1.4 times and 2.4 times the size of Earth – only occurs during the first 50 million years or so of a star system.
Article source: NLD
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An Earth twice as spacious is inevitable, as astronomers recently discovered a deadly desert planet. Rocky planets…