Dale Andersen sent this message on 23 November 2017 at 4:08:18 AM EST: “Yesterday started very nicely with sunshine and little or no winds so the morning hours were pretty […]
2017
Posted inAnalog Studies, Arctic / Antarctic / Alpine, Away Teams & Field Reports, Dale Andersen's Field Reports, Exploration Gear & Tech, Icy Worlds, Robotics/Rovers/UAVs, ROVs/Submersibles/Diving, Status Report
Astrobiologist Dale Andersen Antarctic Status Report 22 November 2017: Nice Weather
Dale Andersen sent this message on 22 November 2017 3:00:56 AM EST: “We have a second day of nice weather with clear skies and light winds which is quite helpful […]
Posted inPress Release, TRAPPIST-1
The TRAPPIST-1 System: Orbital Evolution, Tidal Dissipation, Formation and Habitability
We study the dynamical evolution of the TRAPPIST-1 system under the influence of orbital circularization through tidal interaction with the central star. We find that systems with parameters close to […]
Posted inExoplanets, -moons, -comets, Press Release
Influence of XUV Irradiation from Sgr A* on Planetary Habitability and Occurrence of Panspermia near the Galactic Center
Black holes growing via the accretion of gas emit radiation that can photoevaporate the atmospheres of nearby planets. Here we couple planetary structural evolution models of sub-Neptune mass planets to […]
Posted inExoplanets, -moons, -comets, Habitable Zones, Press Release
Whole Planet Coupling Between Climate, Mantle, and Core: Implications for Evolution of Rocky Planets
Earth’s climate, mantle, and core interact over geologic timescales. Climate influences whether plate tectonics can take place on a planet, with cool climates being favorable for plate tectonics because they […]
Posted inPress Release, Proxima Centauri
Searching For Transit of Earth–mass Exoplanet Proxima~Centauri~b in Antarctica: Preliminary Result
Proxima~Centauri is known as the closest star from the Sun. Recently, radial velocity observations revealed the existence of an Earth–mass planet around it. With an orbital period of ∼11 days, […]
Posted inMars, Press Release
Previous Evidence of Water on Mars Now Identified as Grain Flows
Dark features previously proposed as evidence for significant liquid water flowing on Mars have now been identified as granular flows, where sand and dust move rather than liquid water. According […]
Posted inAnalog Studies, Arctic / Antarctic / Alpine, Away Teams & Field Reports, Dale Andersen's Field Reports, Exploration Gear & Tech, Icy Worlds, Robotics/Rovers/UAVs, ROVs/Submersibles/Diving, Status Report
Astrobiologist Dale Andersen Antarctic Status Report 20 November 2017: Preparing Diving Gear
Dale Andersen sent this message from: Lat -71.33293 Lon 13.45381 on 20 November 2017 5:22:14 AM EST: “Hi Keith: Looks like our weather is improving, but we still have strong […]
Posted inMars, Press Release
Observations Of A New Stabilizing Effect For Polar Water Ice On Mars
Using the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM), we map the temporal variability of water ice absorption bands over the near-polar ice mound in Louth crater, Mars. The absorption […]
Posted inAlpha Centauri, Exoplanets, -moons, -comets, Press Release
Planet Detectability in the Alpha Centauri System
We use more than a decade of radial velocity measurements for α Cen A, B, and Proxima Centauri from HARPS, CHIRON, and UVES to identify the Msini and orbital periods […]