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Wed09202017

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Venus

New Climate Modeling Of Venus May Hold Clues To Earth's Future

— New computer models that indicate the climate of Venus has wavered radically in its relatively recent past may prove valuable to scientists tracking Earth's changing climate, according to two University of Colorado at Boulder researchers.

Despite the recent intrigue in Mars shown by the public, Venus actually is more Earth-like because it's the only other planet with a complex, evolving climate, said Mark Bullock...

— New computer models that indicate the climate of Venus has wavered radically in its relatively recent past may prove valuable to scientists tracking Earth's changing climate, according to two University of Colorado at Boulder researchers.

Despite the recent intrigue in Mars shown by the public, Venus actually is...

Venus holds warning for Earth

— A mysterious high-altitude layer of sulphur dioxide discovered by ESA's Venus Express has been explained. As well as telling us more about Venus, it could be a warning against injecting our atmosphere with sulphur droplets to mitigate climate change.

Venus is blanketed in sulphuric acid clouds that block our view of the surface. The clouds form at altitudes of 50-70 km when sulphur dioxide from volcanoes combines...

— A mysterious high-altitude layer of sulphur dioxide discovered by...

Venus Express finds planetary atmospheres 'such a drag'

— The polar atmosphere of Venus is thinner than expected. How do we know? Because ESA's Venus Express has actually been there. Instead of looking from orbit, Venus Express has flown through the upper reaches of the planet's poisonous atmosphere.

Venus Express went diving into the alien atmosphere during a series of low passes in July-August 2008, October 2009, and February and April 2010. The aim was to measure the...

— The polar atmosphere of Venus is thinner than expected. How do we...

Earth and Venus Lightning: Similar mechanisms on the two planets

— Despite the great differences between the atmospheres of Venus and Earth, scientists have discovered that very similar mechanisms produce lightning on the two planets. The rates of discharge, the intensity and the spatial distribution of lightning are comparable, thus scientists hope to be able to better understand the chemistry, dynamics and evolution of the atmospheres of the two planets.

The results are being...

— Despite the great differences between the atmospheres of Venus and...

Hot atmosphere of Venus might cool interior of Earth’s sister planet

— The heat in the atmosphere of Venus, induced from a strong greenhouse warming, might actually have a cooling effect on the planet's interior. This counter-intuitive theory is based on calculations from a new model presented at the European Planetary Science Congress (EPSC) in Rome.

"For some decades we've known that the large amount of greenhouse gases in the atmosphere of Venus cause the extreme heat we observe...

— The heat in the atmosphere of Venus, induced from a strong...

Was Venus once a habitable planet?

— The European Space Agency's Venus Express is helping planetary scientists investigate whether Venus once had oceans. If it did, it may even have begun its existence as a habitable planet similar to Earth.

These days, Earth and Venus seem completely different. Earth is a lush, clement world teeming with life, whilst Venus is hellish, its surface roasting at temperatures higher than those of a kitchen oven.

But...

— The European Space Agency's Venus Express is helping planetary...

Surfing the alien atmosphere of Venus

— Venus Express has completed an 'aerodrag' campaign that used its solar wings as sails to catch faint wisps of the planet's atmosphere. The test used the orbiter as an exquisitely accurate sensor to measure atmospheric density barely 180 km above the hot planet.

During five aerodrag measurements last week, Venus Express' solar arrays and control systems were operated as one big flying sensor, with the solar arrays...

— Venus Express has completed an 'aerodrag' campaign that used its...

Venus is geologically alive, signs of recent lava flows suggest

— For the first time, scientists have detected clear signs of recent lava flows on the surface of Venus.

The observations reveal that volcanoes on Venus appeared to erupt between a few hundred years to 2.5 million years ago. This suggests the planet may still be geologically active, making Venus one of the few worlds in our solar system that has been volcanically active within the last 3 million years.

The evidence...

— For the first time, scientists have detected clear signs of recent...

Venus records a rich early history

— A widely held hypothesis suggests that Venus experienced catastrophic resurfacing about 500 million years ago, resulting in the burial of 80% of Venus' surface.

This hypothesis predicts that Venus' surface should record only the post-catastrophic history, because postulated catastrophic resurfacing would have buried an earlier record.

In this study, results of global mapping of ribbon-tessera terrain (RTT), a...

— A widely held hypothesis suggests that Venus experienced catastrophic...

Venus Express Adds Evidence For Atmospheric Water Loss On Earth's Twin

— Observations by the European Space Agency’s Venus Express mission have provided strong new evidence that the solar wind has stripped away significant quantities of water from Earth’s twin planet. The data also shed new light on the transfer of trace gases in the Venusian atmosphere and wind patterns.

The results will be presented at the European Planetary Science Congress in Potsdam, Germany, on Wednesday 16...

— Observations by the European Space Agency’s Venus Express mission...

New Map Hints At Venus's Wet, Volcanic Past

— Venus Express has charted the first map of Venus's southern hemisphere at infrared wavelengths. The new map hints that our neighbouring world may once have been more Earth-like, with both a plate tectonics system and an ocean of water.

The map comprises over a thousand individual images, recorded between May 2006 and December 2007. Because Venus is covered in clouds, normal cameras cannot see the surface, but Venus...

— Venus Express has charted the first map of Venus's southern...

Watching Venus Glow In The Dark

— ESA’s Venus Express spacecraft has observed an eerie glow in the night-time atmosphere of Venus. This infrared light comes from nitric oxide and is showing scientists that the atmosphere of Earth’s nearest neighbour is a temperamental place of high winds and turbulence.

Unfortunately, the glow on Venus cannot be seen with the naked eye because it occurs at the invisible wavelengths of infrared. ESA’s Venus Express, h...

— ESA’s Venus Express spacecraft has observed an eerie...

ESA Extends Missions Studying Mars, Venus And Earth’s Magnetosphere

— ESA's Science Programme Committee has extended the operations of ESA's Mars Express, Venus Express and Cluster missions until 31 December 2009

The decision to extend the three successful missions was made on February 4 of this year.

Mars Express -- global view of the Red Planet

Mars Express, launched in June 2003, has been orbiting the Red Planet since the end of 2003, and has produced a treasure of discoveries.

The...

— ESA's Science Programme Committee has extended the operations...

Where Did Venus's Water Go?

— Venus Express has made the first detection of an atmospheric loss process on Venus's day-side. Last year, the spacecraft revealed that most of the lost atmosphere escapes from the night-side. Together, these discoveries bring planetary scientists closer to understanding what happened to the water on Venus, which is suspected to have once been as abundant as on Earth.

The spacecraft's magnetometer instrument (MAG)...

— Venus Express has made the first detection of an atmospheric loss...

Venus Comes To Life At Wavelengths Invisible To Human Eyes

— A pale yellow-green dot to the human eye, Earth’s twin planet comes to life in the ultraviolet and the infrared. New images taken by instruments on board ESA’s Venus Express provide insight into the turbulent atmosphere of our neighbouring planet.

Using Venus Express, it is possible to compare what the planet looks like in different wavelengths, giving scientists a powerful tool to study the physical conditions and...

— A pale yellow-green dot to the human eye, Earth’s twin...

Venus: Global Structure Of Winds And Clouds Have Been Mapped

— Venus is a planet similar in size to the Earth. Nevertheless, it is quite different in other aspects. On the one hand, it spins very slowly on its axis, taking 224 terrestrial days and, moreover, it does so in the opposite direction to that of our planet, i.e. from East to West.

Its dense atmosphere of carbon dioxide with surface pressures 90 times that of Earth (equivalent to what we find at 1000 metres below the...

— Venus is a planet similar in size to the Earth. Nevertheless, it...

Venus Express Reveals New Details On Venusian Clouds

— As ESA's Venus Express orbits our sister planet, new images of the cloud structure of one of the most enigmatic atmospheres of the Solar System reveal brand-new details.

Venus is covered by a thick layer of clouds that extends between 45 and 70 km above the surface. These rapidly-moving clouds are mainly composed of micron-sized droplets of sulphuric acid and other aerosols (fine solid or liquid droplets suspended in...

— As ESA's Venus Express orbits our sister planet, new images of...

Key Molecule Discovered In Venus's Atmosphere

— Venus Express has detected the molecule hydroxyl on another planet for the first time. This detection gives scientists an important new tool to unlock the workings of Venus’s dense atmosphere.

Hydroxyl, an important but difficult-to-detect molecule, is made up of a hydrogen and oxygen atom each. It has been found in the upper reaches of the Venusian atmosphere, some 100 km above the surface, by Venus Express’s V...

— Venus Express has detected the molecule hydroxyl on another...

Hot Climate Could Shut Down Plate Tectonics

— A new study of possible links between climate and geophysics on Earth and similar planets finds that prolonged heating of the atmosphere can shut down plate tectonics and cause a planet's crust to become locked in place.

"The heat required goes far beyond anything we expect from human-induced climate change, but things like volcanic activity and changes in the sun's luminosity could lead to this level of heating,"...

— A new study of possible links between climate and geophysics on...

Plan To Identify Watery Earth-like Planets Develops

— Astronomers are looking to identify Earth-like watery worlds circling distant stars from a glint of light seen through an optical space telescope and a mathematical method developed by researchers at Penn State and the University of Hawaii.

"We are looking for Earth-like planets in the habitable zone of their star, a band not too hot nor too cold for life to exist," says Darren M. Williams, associate professor of...

— Astronomers are looking to identify Earth-like watery worlds...

Search For Active Volcanoes On Venus In High Gear

— ESA’s Venus Express has measured a highly variable quantity of the volcanic gas sulphur dioxide in the atmosphere of Venus. Scientists must now decide whether this is evidence for active volcanoes on Venus, or linked to a hitherto unknown mechanism affecting the upper atmosphere.

The search for volcanoes is a long-running thread in the exploration of Venus. “Volcanoes are a key part of a climate system,” says Fred Tay...

— ESA’s Venus Express has measured a highly variable...