Content with the tag: “titan”
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Stormy Skies and Garden Worlds
Storm clouds that built up over Laguna Negra for several afternoons in a row sent the PLL team indoors. Credit: Henry Bortman
In the fourth report from the 2011 Planetary Lake Lander (PLL) Expedition, the skies above Chile’s Laguna Negra go dark and thunder rolls in the distance. Dramatic weather brings biological sampling efforts at the Andean lake to a temporary halt. Instead, the PLL team spends their time working with samples that have already been collected.When the weather clears, members of the PLL team strike out to yet-unexplored areas of Laguna Negra. When visiting the northwest shore for the first time, they discover a world that is much different than the environment they’ve been studying...
Source: [astrobio.net]
January 9, 2012 / Written by: Henry Bortman
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A Look below the Surface
Erich Fleming (l), Ruben Sommaruga and Alex Echeverria row out onto Laguna Lo Encañado – their boat is still awaiting its motor – to collect water samples. Credit: Henry Bortman
In the second report from the 2011 Planetary Lake Lander Expedition, members of the PLL science team begin their exploration of the Chilean lake, Laguna Lo Encañado (rough translation: lagoon in a canyon). Unlike their primary research site (Laguna Negra), Laguna Lo Encañado is opaque, sea-green in color, and lies at the end of a long valley containing significant wetlands.The Planetary Lake Lander (PLL) team has traveled to remote Laguna Negra in the central Andes of Chile to test technologies that could one day be used to explore the lakes of Titan. The project is led...
Source: [astrobio.net]
December 18, 2011 / Written by: Henry Bortman
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Arrival at Laguna Negra
Members of the Planetary Lake Lander team with representatives of Aguas Andinas. From left to right: Edmond Grin, Trey Smith, Christian Tambley, Nathalie Cabrol, Ruben Sommaruga, Juan Carlos Sanhueza and Luis Hernández, Erich Fleming, Liam Pedersen and Angela Detweiler. Credit: Henry Bortman
A team of scientists has traveled to remote Laguna Negra in the central Andes of Chile to test technologies that could one day be used to explore the lakes of Titan. The Planetary Lake Lander (PLL) project is led by Principal Investigator Nathalie Cabrol of the NASA Ames Research Center and the SETI Institute, and is funded by the NASA Astrobiology Science and Technology for Exploring Planets (ASTEP) program.Astrobiology Magazine’s Expeditions Editor, Henry Bortman, has joined the team in the field and is providing a first-hand account of the expedition.
Source: [astrobio.net]
December 12, 2011 / Written by: Henry Bortman
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Planetary Lake Lander Project Update: Getting Acquainted
Decadal average values for (a) snow mass and snow melt, and (b) ozone and maximum and minimum temperature in the watershed of Laguna Negra. These representations of the three decadal values are shown to capture the dramatic environmental change that occurred during the 90s. Interannual and interseasonal fluctuations, timing shifts in precipitation, and lag response of the system that are not shown by the decadal averages are also part of this complex change.
June 24, 2011. Getting Acquainted…
This past couple of weeks were about getting better acquainted with what our probe will be and with our exploration site at Laguna Negra (33°S) in the Central Andes. The analysis of historical data archives is now underway and suggests that the region has experienced substantial environmental changes over the past three decades (Figure), most of them acquired by the 90s. For instance, 2.5% of ozone was lost and not recovered compared to the 80s. This is similar to our results obtained in the arid Andes (18-23°S), and consistent with the opening of the...Source: [Planetary Lake Lander Project]
July 1, 2011 / Written by: Nathalie Cabrol
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Five Steps Toward Future Exploration
Five new ASTEP projects have been selected for funding. PIs include Donald Banfield of Cornell University, Lisa Pratt of Indiana University, Nathalie Cabrol of NASA Ames Research Center and the SETI Institute, Bill Stone of Stone Aerospace and David Wettergreen of Carnegie Mellon University.
The NASA Astrobiology Science & Technology for Exploring Planets (ASTEP) program has announced a set of new projects to develop and test technologies that will enable the astrobiological exploration of the Solar System. From the Atacama desert in Chile to the Great Slave Lake in arctic Canada to southwest Greenland, the projects involve technologies that will be deployed in some of the most fascinating locations on Earth. As the teams seek to understand the potential for life elsewhere, they will also decipher links between life in extreme environments and the climate history of our own planet,...Source: [NASA Astrobiology]
June 4, 2011 / Written by: Aaron L. Gronstal
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Oxygen Moves from Enceladus to Titan
Using data from Cassini, scientist have created a new model that shows the complex interactions between Saturn and its satellites. The model is helping astrobiologists understand how oxygen may end up on the surface of Titan, potentially providing a basis for pre-biological chemistry on the icy moon. The findings, show a chemical connection between the moons Titan and Enceladus as material travels through the Saturn system.Source: [astrobio.net]
July 6, 2010 / Written by: NASA Goddard
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New Results from Titan
Two recent studies based on data from NASA’s Cassini spacecraft scrutinize the complex chemical activity on the surface of Saturn’s moon Titan. One key finding comes from a new paper in Icarus that predicts a strong flux of hydrogen in the atmosphere, but a lack of it at the surface. The other paper, in the Journal of Geophysical Research maps deposits of many hydrocarbons on Titan’s surface and shows a lack of acetylene, contrary to expectations. They also found little evidence for exposed water ice on the surface.
The depletions of hydrogen and acetylene present...
June 15, 2010 / Posted by: Daniella Scalice
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Cassini Saturnalia
Six years ago, the Cassini-Huygens spacecraft began orbiting Saturn. The mission returned incredible data concerning the mysterious moon Titan – a possible analog for a pre-life Earth. Cassini also discovered plumes of ice and water vapor erupting from the moon Enceladus.
As Cassini continues to return information about the Saturn system, scientists are celebrating the data and detailed images the mission has provided of the planet, its famous rings, and its many moons thus far.Source: [astrobio.net]
April 27, 2010 / Written by: Richard Corfield
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Counting Titan’s Craters
NASA’s Cassini mission has been returning invaluable data for astrobiologists since its arrival at Saturn in 2004, and the discoveries just keep coming. Cassini images of Saturn’s moon Titan are now helping scientists from the Lunar and Planetary Laboratory at the University of Arizona determine the moon’s age and physical properties. Titan is thought to be too cold to support life as we know it, but in some ways the moon is remarkably similar to Earth. Some scientists believe the atmospheric composition of Titan might be similar to that of the early Earth, and could thereby teach...Source: [astrobio.net]
April 22, 2010 / Written by: Anuradha K. Herath
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Life Without Water?
On Saturn’s giant moon Titan, it is so cold that water is frozen as hard as granite. And yet there is a complete liquid cycle of methane and ethane. Some scientists wonder whether there could also be life.
A new NASA mission to Titan is not yet on the books, but mission planners are beginning to consider possible scenarios for a visit to the moon in the future. A small, inexpensive lander known as the Titan Mare Explorer (TiME) could launch as early as 2015, arriving in 2022 or 2023.Source: [astrobio.net]
March 18, 2010 / Written by: Henry Bortman
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The Origin of Titan's Methane
Titan's Ethane Lake. (Image Credit: NASA/JPL)The origin of the atmosphere of Saturn’s largest moon, Titan, has been an enduring mystery for decades. NAI scientists from the ASU team think they may finally have an answer. They tested the recently popular hypothesis that methane in Titan’s atmosphere originated in hydrothermal systems deep within Titan. Their work was made possible by chemical data that were acquired when NASA’s Cassini spacecraft passed through a plume of water and other compounds from Enceladus.
Using a geochemical model, the team deduced that Titan’s atmospheric methane has much less deuterium than would be expected if the...
February 17, 2010 / Posted by: Daniella Scalice
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Studying Titan’s Lakes on Earth
Saturn’s moon Titan is the only other object in the solar system known to have liquid on its surface. However, with temperatures as low as -179°C, these lakes are definitely not filled with water.
Titan’s hydrocarbon lakes are poorly understood, but a NASA-supported project hopes to gain a better understanding of their properties by replicating the surface of Titan in a lab. The research could also yield clues about the chemistry that led to the origin of life on Earth.Source: [astrobio.net]
January 28, 2010 / Written by: Michael Schirber
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Titan's Triple Threat
The Cassini-Huygens mission has given us our best view yet of Titan, but this moon of Saturn still remains shrouded in mystery. A proposed future mission takes a three-tiered approach – using an orbiting spacecraft, a surface probe, and a hot air balloon — to further explore the enigmatic moon.Source: [Astrobiology Magazine]
November 7, 2008 / Written by: Leslie Mullen -
Titan is Electric
Scientists have determined that Saturn’s moon Titan could have electrical storms occurring in its atmosphere. Such storms might provide energy for the formation of important organic and pre-biotic molecules.Source: [Astrobiology Magazine]
October 29, 2008 / Posted by: Marco Boldt
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Signs of Ocean Beneath Titan's Crust?
NASA’s Cassini spacecraft has discovered evidence that points to the existence of an underground ocean of water and ammonia on Saturn’s moon Titan. The Cassini science team detail their findings in this week’s Science, explaining that radar mapping of Titan revealed a shift in landmarks on the moon’s surface of up to 30 kilometers between October 2004 and May 2007. The best explanation, they say, is an underground ocean that disconnects Titan’s icy crust from its rocky interior.
March 25, 2008 / Posted by: Daniella Scalice
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Earth's Future Glimpsed on Titan
The enigmatic Saturnian moon Titan is still yielding surprising new details years after scientists first pierced its thick haze veil. The vision now emerging of Saturn’s largest moon, with its giant dunes and oceanless surface, is perhaps a glimpse of Earth’s desert future. Space.com has the story…
Source: [Link]
June 12, 2007 / Posted by: Shige Abe
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NASA's Cassini Spacecraft Images Seas on Titan
Instruments on NASA’s Cassini spacecraft have found evidence for seas, likely filled with liquid methane or ethane, in the high northern latitudes of Saturn’s moon Titan. One such feature is larger than any of the Great Lakes of North America and is about the same size as several seas on Earth.
Source: [Link]
March 14, 2007 / Posted by: Shige Abe
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Organic Hazes on Early Earth and Titan
Researchers from NAI’s Unviersity of Colorado, Boulder and University of Arizona Teams have published a new study in PNAS this week about the atmospheres of both present day Titan and early Earth. For Titan, their experiments modeled conditions measured by the Huygens probe from NASA’s Cassini mission, and CO2 was added to model the early Earth conditions. They conclude that organize haze can form over a wide range of methane and carbon dioxide concentrations.
Source: [Link]
November 7, 2006 / Posted by: Shige Abe
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NASA Study Shows Titan and Early Earth Atmospheres are Similar
Organic haze in the atmosphere of Saturn’s moon, Titan, is similar to haze in early Earth’s air — haze that may have helped nourish life on our planet— according to a NASA Astrobiology Institute study released Nov. 6, 2006.
November 6, 2006 / Posted by: Shige Abe
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Titanic Moon: Orange Soup from Saturnian Turn
Researchers for the NASA Astrobiology Institute and Penn State have recently developed a new method that has improved our understanding of Titan’s atmospheric chemistry.
December 19, 2000 / Posted by: Shige Abe
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