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The possibility of life on Venus is a subject of interest in astrobiology due to Venus' proximity and similarities to Earth. To date, no definitive evidence has been found of past or present life there.
Today's Venus can be described as hellish: there is almost no water vapor, the carbon dioxide atmosphere is 90 times as thick as that on Earth and temperatures can reach a scorching 864 degrees.
Planetary habitability in the Solar System is the study that searches the possible existence of past or present extraterrestrial life in those celestial bodies. As exoplanets are too far away and can only be studied by indirect means, the celestial bodies in the Solar System allow for a much more detailed study: direct telescope observation, space probes, rovers and even human spaceflight.
The mesosphere of Venus extends from 65 km to 120 km in height, and the thermosphere begins at approximately 120 km, eventually reaching the upper limit of the atmosphere (exosphere) at about 220 to 350 km. [28] The exosphere begins when the atmosphere becomes so thin that the average number of collisions per air molecule is less than one.
Astronomers have speculated for decades that Venus could once have been remarkably similar to Earth – and might have been able to support life like our own planet Scientists give message to ...
Just next door, cosmologically speaking, is a planet almost exactly like Earth. It’s about the same size, is made of about the same stuff and formed around the same star. To an alien astronomer ...
Asteroid impacts on Venus are another common phenomenon that could have shaped Venus’ surface to evolve with these geological features, although such an asteroid would have to be huge because asteroids burn up in Venus’s atmosphere and pass through clouds sulfuric and other acids. [6]
The EnVision Venus explorer will study that planet in unprecedented detail, from inner core to the top of its atmosphere, to help astronomers understand why the hot, toxic world didn’t turn out ...