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The unexplained forms seen on Venus, which some scientists have suggested could be signs of extraterrestrial life, are even more mysterious than we thought.
Researchers studying the Venusian surface have discovered, after a ground-breaking new study, that strange black spots are affecting the planet's climate.
Scientists have known the dark "stains" on the surface for over a century and they change over time. But they have never been explained, some researchers suggesting that they could be a proof of life.
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"The particles that make up the dark spots have been suggested as ferric chloride, sulfur allotropes, sulfur dioxide, etc., but none of these, up to now, are in able to satisfactorily explain their properties of training and absorption, "Yeon said. Joo Lee, lead author of the new report, in a statement.
Observations show that the particles in these dark spots seem to be the same size and behave in the same way as the microorganisms present in the Earth's atmosphere. With other evidence, this has led some of the world's most famous scientists, including Carl Sagan, to speculate that shadowy areas could be life.
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"When stars like the Sun grow up, they expand and turn red, so these so-called red giants begin to lose their outer layers of matter in space." More than half of the mass of one such star can be lost, At the same time, the nucleus of the star contracts and heats up, emitting ultraviolet light that shines the expelled gases.
This type of object is called, somewhat confusingly, a planetary nebula, although it has nothing to do with the planets. The name comes from the rounded and planetary appearance of these objects in the first telescopes "- European Space Agency
Nasa
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We see two interacting galaxies. This pair of galaxies is known as UGC2369 and is grouped by mutual gravitational attraction. Our next galaxy, the Milky Way, is expected to interact with another galaxy, Andromeda, in four billion years. The two galaxies will eventually merge to form a galaxy that scientists already call Milkomeda
Nasa
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Mount Shasta in California 260 km above the Earth aboard the International Space Station
Nasa
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The galaxy NGC 5866 is viewed from a side angle. We have the habit of seeing galaxies from the front, but NGC 5866 is so inclined to Earth that we can only see it from the front.
Nasa
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The latest Jupiter portrait by the Hubble telescope shows a more intense color palette swirling in Jupiter 's atmosphere compared to recent years. The different colors of the bands help scientists understand what is happening in Jupiter's atmosphere
Nasa
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The illustration of the artist shows the exoplanet LHS 3844b, which represents 1.3 times the mass of the Earth and is located at 49 light-years away. The illustration is based on NASA's research on this newly discovered planet
Nasa
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Soyuz spacecraft carrying cargo and supplies arrives at International Space Station
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A planetary nebula (radiation emitted by a dying star) is seen in the constellation Gemini by the Hubble telescope
Nasa
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North Coast of Africa by Libya and Tunisia seen from 260 km above the Earth aboard the International Space Station
Nasa
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This image of NASA's dynamic solar observatory shows our sun in a different light. In color are the active regions of the Sun's atmosphere, for example. solar flares and coronal mass ejections
Nasa
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"When stars like the Sun grow up, they expand and turn red, so these so-called red giants begin to lose their outer layers of matter in space." More than half of the mass of one such star can be lost, At the same time, the nucleus of the star contracts and heats up, emitting ultraviolet light that shines the expelled gases.
This type of object is called, somewhat confusingly, a planetary nebula, although it has nothing to do with the planets. The name comes from the rounded and planetary appearance of these objects in the first telescopes "- European Space Agency
Nasa
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We see two interacting galaxies. This pair of galaxies is known as UGC2369 and is grouped by mutual gravitational attraction. Our next galaxy, the Milky Way, is expected to interact with another galaxy, Andromeda, in four billion years. The two galaxies will eventually merge to form a galaxy that scientists already call Milkomeda
Nasa
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Mount Shasta in California 260 km above the Earth aboard the International Space Station
Nasa
4/10
The galaxy NGC 5866 is viewed from a side angle. We have the habit of seeing galaxies from the front, but NGC 5866 is so inclined to Earth that we can only see it from the front.
Nasa
5/10
The latest Jupiter portrait by the Hubble telescope shows a more intense color palette swirling in Jupiter 's atmosphere compared to recent years. The different colors of the bands help scientists understand what is happening in Jupiter's atmosphere
Nasa
6/10
The illustration of the artist shows the exoplanet LHS 3844b, which represents 1.3 times the mass of the Earth and is located at 49 light-years away. The illustration is based on NASA's research on this newly discovered planet
Nasa
7/10
Soyuz spacecraft carrying cargo and supplies arrives at International Space Station
8/10
A planetary nebula (radiation emitted by a dying star) is seen in the constellation Gemini by the Hubble telescope
Nasa
9/10
North Coast of Africa by Libya and Tunisia seen from 260 km above the Earth aboard the International Space Station
Nasa
10/10
This image of NASA's dynamic solar observatory shows our sun in a different light. In color are the active regions of the Sun's atmosphere, for example. solar flares and coronal mass ejections
Nasa
Researchers have now learned more about how these clouds affect the planet's climate.
The researchers looked for changes in the "albedo" of the planet or how much it absorbs the light that strikes it. They found that it seemed to vary enormously: between 2006 and 2017, the amount of light reflected in the space was halved and then began to increase again.
These changes have had an equally important effect on the amount of solar energy absorbed by clouds and thus on the amount of circulation in the atmosphere of the planet. An intense activity could be observed in the atmosphere of the planet, with clouds circling at more than 300 km / h and could be explained by these changes.
But, adding to the mystery, scientists still do not know why these dramatic changes are happening.
"It's a striking result," adds Limaye. "It suggests that something is changing. We can see the change of brightness. If albedo is changing, it is something that motivates these changes. The question is, what is the cause? "
These dark areas that have been the subject of so much speculation have been described as unknown absorbers and could play a role in these changes.
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