The differences between Earth and Venus are obvious to us. One is radiant with life and adorned with glittering seas, and the other is a scorching, glowering hellhole, its volcanic surface shrouded by thick clouds and visible only with radar. But the difference wasn’t always clear. In fact, we used to call Venus Earth’s sister planet.
Can astronomers tell exo-Earths and exo-Venuses apart from a great distance?
In a recent paper accepted to Contemporary Physics, a physicist from Imperial College London uses past missions and recent findings to encourage the importance of searching for life in the atmosphere of the solar system’s most inhospitable planet, Venus. This comes as a 2020 announcement claimed to have discovered the presence of phosphine in Venus’ atmosphere followed by follow-up observations from NASA’s recently-retired SOFIA aircraft in late 2022 that refuted it. Despite this, Dr. David Clements, who is a Reader in Astrophysics in the Department of Physics at Imperial College London, recently told Universe Today that “there is something odd going on in the atmosphere of Venus.”
The on-again, off-again detection of phosphine in the atmosphere of Venus appears to be off-again – for now. The latest study, based on data from the SOFIA telescope, reveals that the flying observatory didn’t see any signs of phosphine. According to the results, if there is any phosphine present in Venus’s atmosphere at all, it’s a maximum of about 0.8 parts per billion, much smaller than the initial estimate.
However, the team that made the initial detection of phosphine, which was announced in 2020, disagrees with the researchers’ interpretation of the SOFIA data.
Is there anything good about volcanoes? They can be violent, dangerous, and unpredictable. For modern humans, volcanoes are mostly an inconvenience, sometimes an intriguing visual display, and occasionally deadly.
But when there’s enough of them, and when they’re powerful and prolonged, they can kill the planet that hosts them.
We’ve reported in the past about the Venus Life Finder (VLF) mission, which is currently in the proposal stage but could potentially one day explore the Venusian clouds for signs of life. What exactly that life would look like is anyone’s guess. Therefore, the instrumentation the mission will use to find that life will be critical. Enter Fluid-Screen (FS), a technology developed by a start-up company spun out of Yale by Dr. Monika Weber. It could potentially directly detect life in the Venusian atmosphere – if only it could deal with the sulfuric acid.
We recently examined how and why Saturn’s largest moon, Titan, could answer the longstanding question: Are we alone? It’s the only moon that possesses a thick atmosphere and the only planetary body other than Earth (so far) that has liquid bodies on its surface. These characteristics alone make Titan an enticing location to search for life beyond Earth. In contrast, what if life were to be found in one of the unlikeliest of places and on a planet that is known to possess some of the harshest conditions ever observed?
Massive solar storms on the Sun are becoming more common as it moves into a period of increasing solar activity as part of Solar Cycle 25, which is expected to peak in 2025. There’s one spacecraft that will be very well placed to capture that increasing activity. Solar Orbiter is currently 25% of the way through its ten-year mission of observing the Sun. By 2025 it will be closer than ever to our parent star, and it has already started observing some fantastic phenomena from our Sun.
In a recent study published in Instrumentation and Methods for Astrophysics, the private space company, Rocket Lab, outlines a plan to send their high-energy Photon spacecraft to Venus in May 2023 with the primary goal of searching for life within the Venusian atmosphere. The planet Venus has become a recent hot topic in the field of astrobiology, which makes the high-energy Photon mission that much more exciting.
Rocket Lab hopes to build off their recent successful launch of the CAPSTONE mission using its Photon satellite bus, and consists of a CubeSat designed to study the near rectilinear halo orbit (NRHO) around the Moon and its applications for long-term missions such as Gateway.
Venus has almost been “the forgotten planet,” with only one space mission going there in the past 30 years. But the recent resurgence of interest in Earth’s closest neighbor has NASA and ESA committing to three new missions to Venus, all due to launch by the early 2030s.
ESA’s EnVision mission Venus is slated to take high-resolution optical, spectral and radar images of the planet’s surface. But to do so, the van-sized spacecraft will need to perform a special maneuver called aerobraking to gradually slow down and lower its orbit through the planet’s hot, thick atmosphere. Aerobraking uses atmospheric drag to slow down a spacecraft and EnVision will make thousands of passages through Venus’ atmosphere for about two years.
The planet Venus is one of the most inexplainable and mysterious planetary objects in our solar system as its surface is beyond inhospitable for us fragile humans with temperatures at a searing 475 degrees Celsius (900 degrees Fahrenheit) and surface pressures more than 90 times that of Earth. However, its atmosphere is quite a different story as its temperature varies considerably ranging from -143 degrees Celsius (-226 degrees Fahrenheit) at night to 37 degrees Celsius (98 degrees Fahrenheit) in the daytime, and varies based on altitude, as well.