Se trata del décimo proyecto del gigante asiático que alcanza la fase de ensayos en humanos
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A team of astronomers who have carefully studied archival data from 2010 from the Canada-France-Hawaii Telescope maintain that Jupiter not only has the 79 moons that have been detected so far, but many more: at least 600 irregular moons more than a kilometer in diameter.
That telescope has a powerful digital camera called MegaCam. It is a 340-megapixel wide-field imager that sees in optical and near-infrared. The authors will present their findings at the Virtual Europlanet 2020 Scientific Congress.
jovian moons
But what is the difference between regular and regular moons? If regular moons are formed by the accumulation of material in a disk (like planets) The irregular ones are objects captured by the planet's gravity, which on Jupiter is nothing to sneeze at.
That is, unlike Jupiter's largest moons, such as Io, Europa and Ganymede, these irregular moons were not formed by accumulating material in a disk.
Its capture may have been due to "gas entrainment, falling due to sudden mass growth, and three-body interactions."
The team of astronomers found 52 objects in their images that they identified as irregular moons, and then they estimated the figure of 600 by simple extrapolation. The objects had magnitudes up to 25.7, and that corresponds to objects with diameters of approximately 800 meters. Of those 52, seven of the brightest were already known irregular moons.
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The news
A new study estimates that orbiting Jupiter there would be about 600 moons (all larger than a kilometer)
was originally published in
Xataka Science
by
Sergio Parra
.
According to him WWF Living Planet Report 2020 (World Wide Fund for Nature), Wild animal populations have fallen by two thirds since 1970. Specifically, 68% in global populations of mammals, birds, amphibians, reptiles and fish between 1970 and 2016.
Freshwater wildlife have also suffered a decline of 84%, the steepest average population decline in any biome, equivalent to 4% per year since 1970.
The principal cause
The main factor in this animal loss is due to our diet.: We need a lot of land to produce food, which results in habitat loss and degradation, including deforestation.
That is, to solve the problem, drastic measures must be taken, both in the way we eat and manage food, as well as invest more in the protection of certain environments.
The Living Planet Index (LPI), provided by the Zoological Society of London (ZSL) tracked almost 21,000 populations of more than 4,000 vertebrate species between 1970 and 2016. As Gun explains Tim Newbold, from the UCL Biodiversity and Environment Research Center (University College London):
Changing land use, whether for agriculture, energy, transport or housing, has a profound impact on biodiversity, as many plants and animals can no longer survive in an environment, and the remaining wild nature may not be large enough to support a species. This is now affecting the composition of plants and animals, as generalist species are better able to survive while more specialized species become extinct.
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The news
Global animal populations have declined by an average of two-thirds in less than half a century.
was originally published in
Xataka Science
by
Sergio Parra
.
El autor opina que la resiliencia del sistema investigador español explica que no se haya producido un colapso generalizado de la investigación