According to multiple lines of evidence, Venus was once a much different planet than it is today. But roughly 500 million years ago, a massive resurfacing event triggered a runaway greenhouse effect that led to the hot, poisonous, and hellish environment we see there today. Therefore, the study of Venus presents an opportunity to model the evolution of planetary environments, which can serve as a reference for what could happen in the future.
In the coming years, NASA plans to send lighter-than-air missions to Venus to explore the atmosphere above the cloud tops, where temperatures are stable and atmospheric pressure is comparable to that of Earth. With support from NASA, engineers at West Virginia University (WVU) are developing software that will enable balloon-based aerial robots (aerobots) to survey Venus’ atmosphere in small fleets.
Continue reading “Floating “Aerobats” Could be the Best way to Explore the Cloud Tops of Venus”
Thanks to evidence provided by missions like NASA’s Magellan spacecraft, scientists have theorized that Venus likely experienced a catastrophic resurfacing event about 500 million years ago (give or take 200 Mya). This is believed to be the reason why Venus is such a hellish place today, with an atmosphere that is 92 times as dense as Earth’s, predominantly composed of carbon dioxide (CO2), and temperatures hot enough to melt lead.
The question of what Venus was like before this event took place – particularly, whether or not it had oceans – has been the subject of debate ever since. While many believe that Venus’s surface was covered in large bodies of water, a recent study has contradicted this claim. Using a state-of-the-art climate model, a team of French researchers has developed an alternative scenario of how Venus evolved to become what it is today.
Continue reading “A new Climate Model Suggests That Venus Never had Oceans”
Carl Sagan once famously, and sarcastically, observed that, since we couldn’t see what was going on on the surface of Venus, there must be dinosaurs living there. Once humans started landing probes on the planet’s surface, any illusion of a lush tropical world was quickly dispelled. Venus was a hellscape of extraordinary temperatures and pressures that would make it utterly inhospitable to anything resembling Earth life.
But more recently, astrobiologists have again turned their attention to the Morning Star. But this time, instead of looking at the surface, they looked in the clouds. And now, a new study from researchers at California Polytechnic, Pomona, has calculated that there is likely a layer in the atmosphere where photosynthesis can occur. Meaning there is a zone in Venus’ cloud layer where life could have evolved.
Continue reading “There’s Enough Sunlight Getting Through Venus’ Clouds to Support High-Altitude Life”
Two spacecraft made historic flybys of Venus last week, and both sent back sci-fi-type views of the mysterious, cloud-shrouded planet.
The Solar Orbiter and BepiColombo spacecraft both used Venus for gravity assists within 33 hours of each other, capturing unique imagery and data during their encounters.
Continue reading “The First Images and Videos from the Double Venus Flyby”
When Longfellow wrote about “ships passing in the night” back in 1863, he probably wasn’t thinking about satellites passing near Venus. He probably also wouldn’t have considered 575,000 km separation as “passing”, but on the scale of interplanetary exploration, it might as well be. And passing is exactly what two satellites will be doing near Venus in the next few days – performing two flybys of the planet within 33 hours of each other.
Continue reading “Two Spacecraft are Flying Past Venus, Just 33 Hours Apart”
Observing the dark side of planets is hard. In the visible spectrum, they are almost unobservable, while in the infrared some heat signatures may come through, but not enough to help see what is going on in a planet’s atmosphere. Now a team from the University of Tokyo think they’ve developed a way to monitor weather patterns on the night side of one of the most difficult planets of all – Venus.
Continue reading “Observing the Night Side of Venus is Actually Pretty Tricky”
Planets move in mysterious ways. Or at least their surfaces do. Earth famously has a system of tectonic plates that drives the movement of its crust. Those plate tectonics are ultimately driven by the flow of material in the mantle – the layer directly below the crust. Now, scientists have found a slightly different deformation mechanic on our nearest sister planet – Venus.
Continue reading “Venus’ Surface Tectonics is More Like Pack ice on Earth”
For decades, scientists engaged in the search for life in the Universe (aka. astrobiology) have focused on searching for life on other Earth-like planets. These included terrestrial (aka. rocky) planets beyond our Solar System (extrasolar planets) and ones here at home. Beyond Earth, Mars is considered to be the most habitable planet next to Earth, and scientists have also theorized that life could exist (in microbial form) in the cloud tops of Venus.
In all cases, a major focal point is whether or not planets have large bodies of water on their surfaces (or did in the past). However, a new study led by a research team from the UK and German (with support from NASA) has shown that the existence of life may have less to do with the quantity of water and more to with the presence of atmospheric water molecules. As a result, we may have better luck finding life on Jupiter’s turbulent cloud deck than Venus’.
Continue reading “Bad News, Life Probably can’t Exist on Venus. Good News, it Could be in Jupiter’s Clouds”
It’s an exciting time to be a Venus watcher. Our sister planet, which has been the target of only one mission since the 1980s, is now the focus of not one, not two, but three missions from NASA and ESA. Combined, they promise to give the closest look ever at the Morning Star, and some of the processes that might have made such a similar world so different from our own.
Continue reading “ESA is Joining NASA With Their own Mission to Venus”
NASA’s planetary science program is making a big bet on Venus, after decades of putting its chips on Mars in the search for hints of past or present life out there in the solar system.
The bet comes in the form of a double dose of development funding for Discovery Program missions, amounting to as much as $1 billion. Both DAVINCI+ and VERITAS were selected from a field of four finalists in a competitive process — leaving behind missions aimed at studying Jupiter’s moon Io and Neptune’s moon Triton.
“These two sister missions are both aimed to understand how Venus became an inferno-like world capable of melting lead at the surface,” NASA Administrator Bill Nelson said June 2 in his first “State of NASA” address. “They will offer the entire science community the chance to investigate a planet we haven’t been to in more than 30 years.”
Lessons from Venus, which underwent a runaway greenhouse effect early in its existence, could improve scientists’ understanding of our own planet’s changing climate. The missions could also address one of the biggest questions about the second rock from the Sun: whether life could exist in the upper reaches of its cloud layer.
Continue reading “NASA Orders Up a Double Shot of Venus Missions Amid Questions About Life”