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- Could there be microbes living in Venus\u2019 clouds?<\/strong> A new proposed mission concept from researchers in the U.K. called VERVE might answer that question.<\/li>\n
- VERVE, a small probe,<\/strong> would analyze Venus\u2019 atmosphere and search for possible biosignature gases like phosphine and ammonia.<\/li>\n
- The probe would hitch a ride on the EnVision mission spacecraft,<\/strong> scheduled to launch sometime in 2031.<\/li>\n<\/ul>\n
Is there life on Venus?<\/h3>\n
Is there life in the clouds of Venus? We still don\u2019t know for sure, although some studies continue to support this possibility. Now, scientists in the U.K. \u2013 led by astronomer Jane Greaves at Cardiff University \u2013 have proposed a new mission that could finally answer the question. The researchers said on July 9, 2025, that a CubeSat-sized probe called VERVE (Venus Explorer for Reduced Vapours in the Environment) could be added to the European Space Agency\u2019s EnVision mission, currently scheduled to launch in 2031. When it arrives at Venus, VERVE would detach from EnVision and begin its own survey of the planet\u2019s dense atmosphere. It would search for and map phosphine, ammonia and other gases rich in hydrogen. These gases might be biosignatures, or signs of microbial life.<\/p>\n
The researchers presented the details about the new mission concept at the Royal Astronomical Society\u2019s National Astronomy Meeting 2025 in Durham, U.K. on July 9, 2025.<\/p>\n
The EnVision mission will study Venus\u2019 surface, interior and atmosphere. Although the planet\u2019s surface is scorching hot, too hot for life as we know it, the middle layers of the atmosphere \u2013 about 31 miles (50 km) up \u2013 are much more Earth-like in pressure and temperature, around 85 Fahrenheit (30 C) to 158 Fahrenheit (70 C). <\/p>\n
Could microbes inhabit that environment, as they do on Earth?<\/p>\n
![\"Diagram](\"https:\/\/earthsky.org\/upl\/2025\/07\/VERVE-EnVision-mission-proposal-Venus-2031.png\")
View larger. | The VERVE probe would hitch a ride to Venus on the EnVision spacecraft. After arriving at Venus, it would remain in a high orbit and study Venus\u2019 atmosphere. The main EnVision spacecraft would be about 136-316 miles (220-510 km) above the planet when it releases VERVE. Image via Jane Greaves\/ Royal Astronomical Society (CC BY 4.0).<\/figcaption><\/figure>\n Hitching a ride to Venus<\/h3>\n
If the mission is approved, VERVE \u2013 a small CubeSat-sized probe \u2013 would hitch a ride to Venus with the EnVision spacecraft. Upon arrival at Venus, it would detach from EnVision and enter a high orbit. Then, it would begin its own study of Venus\u2019 atmosphere. <\/p>\n
EnVision, meanwhile, would continue its own mission of exploring the planet overall. VERVE currently has an estimated budget of 50 million euros (43 million pounds).<\/p>\n
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There’s been plenty of debate about the possibility of life on Venus, ever since phosphine was detected in the planet’s clouds in 2020 and hints of another potential biomarker ammonia last year.??<\/p>\n
\u2014 Royal Astronomical Society (@royalastrosoc.bsky.social) 2025-07-09T16:55:25.848Z<\/p>\n<\/blockquote>\n
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But the only way to know for sure whether “extremophile” microbes might be responsible for producing these gases is to go there, researchers behind the JCMT-Venus project say, and that’s what they’re proposing to do\u2026ras.ac.uk\/news-and-pre\u2026 #NAM2025<\/p>\n
\u2014 Royal Astronomical Society (@royalastrosoc.bsky.social) 2025-07-09T16:55:26.616Z<\/p>\n<\/blockquote>\n
2 potential biosignatures<\/h3>\n
The VERVE mission concept is based on findings in recent years about Venus\u2019 atmosphere. This is the discovery of evidence for the gases phosphine and ammonia. Greaves and her colleagues announced the still-debated phosphine discovery in late 2020, and another team of scientists announced the tentative finding of ammonia in 2024.<\/p>\n
Both of those gases are unexpected in the atmosphere of a planet like Venus. As Greaves noted in the abstract for the National Astronomy Meeting presentation:<\/p>\n
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Ground-based observations are starting to uncover reduced gases that are very unexpected in the oxidised atmosphere of Venus. Their presence suggests a redox disequilibrium, with one possible contributor being the presence of anaerobic microorganisms. We are proposing a mission to the ESA mini-Fast call to study these gases up close, hoping for a ride to Venus alongside ESA EnVision in 2031. I will discuss the plan for VERVE \u2013 the Venus Explorer for Reduced Gases in the Environment \u2013 including its instrument and science plan and the relation to other missions including the Venus Morning Star life-seeking mission.<\/p>\n<\/blockquote>\n
![\"Smiling](\"https:\/\/earthsky.org\/upl\/2025\/07\/Jane-Greaves-Cardiff-University.jpeg\")
Astronomer Jane Greaves at Cardiff University in the U.K. is heading the new mission concept to explore Venus\u2019 atmosphere. Image via Cardiff University.<\/figcaption><\/figure>\n Where do the phosphine and ammonia come from?<\/h3>\n
Confirming \u2013 or not \u2013 the gases is one thing. But determining their origin is another. Are they biological or non-biological? Greaves said:<\/p>\n
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Our latest data has found more evidence of ammonia on Venus, with the potential for it to exist in the habitable parts of the planet\u2019s clouds. There are no known chemical processes for the production of either ammonia or phosphine, so the only way to know for sure what is responsible for them is to go there. The hope is that we can establish whether the gases are abundant or in trace amounts, and whether their source is on the planetary surface, for example in the form of volcanic ejecta. Or whether there is something in the atmosphere, potentially microbes that are producing ammonia to neutralise the acid in the Venusian clouds.<\/p>\n<\/blockquote>\n
The more recent tentative detection of ammonia is just as interesting as the phosphine. On Earth, it is primarily the result of the decay of plant and animal matter. Smaller amounts also come from natural processes such as volcanic activity. It can also form on planets like Jupiter, thought to be primarily through intense thunderstorms and ammonia-water \u201cmushballs.\u201d<\/p>\n
But planets like Jupiter, and their atmospheres, are a lot different from rocky worlds like Venus and Earth. So the source of Venus\u2019 ammonia is still a puzzle. Some scientists theorize that both the ammonia and phosphine could come from volcanoes. And indeed, there is growing evidence for active volcanoes on Venus. But other scientists have said they likely wouldn\u2019t produce enough to match the levels reported.<\/p>\n
![\"Infographic](\"https:\/\/earthsky.org\/upl\/2025\/07\/EnVision-Venus-infographic-ESA.png\")
View larger. The EnVision mission \u2013 which VERVE would hitch a ride with \u2013 will study Venus\u2019 surface, subsurface and atmosphere. Image via ESA.<\/figcaption><\/figure>\n Conflicting studies<\/h3>\n
The phosphine in particular has been the subject of debate and controversy. After the initial announcement in 2020, some other studies of Venus\u2019 atmosphere failed to confirm it. But then even more recent studies from Greaves and her colleagues \u2013 for the long-term JCMT-Venus project \u2013 did find it again, along with more clues. The team found that the gas seems to follow the planet\u2019s day-night cycle and also varies with time and location. In the day-night cycle, sunlight destroys the phosphine, but then it still gets replenished somehow. Dave Clements, at Imperial College London, is the leader of the JCMT-Venus project. He said:<\/p>\n
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This may explain some of the apparently contradictory studies and is not a surprise given that many other chemical species, like sulphur dioxide and water, have varying abundances, and may eventually give us clues to how phosphine is produced.<\/p>\n<\/blockquote>\n
Bottom line: Could there be life on Venus? A new probe concept from the UK would hitch a ride with the EnVision mission and look for biosignature gases in Venus\u2019 atmosphere.<\/p>\n
Source: VERVE \u2013 a proposal for an ESA mini-Fast mission to Venus<\/p>\n
Via Royal Astronomical Society<\/p>\n
Read more: Amino acids on Venus? New study says it\u2019s possible<\/p>\n
Read more: Venus\u2019 clouds could soon be brought to Earth<\/p>\n
<\/div>\n
\n - VERVE, a small probe,<\/strong> would analyze Venus\u2019 atmosphere and search for possible biosignature gases like phosphine and ammonia.<\/li>\n