J. Helbert
A5055026701- Planetary Science and Exploration
- Astro and Planetary Science
- Space Exploration and Technology
- Isotope Analysis in Ecology
- Spacecraft and Cryogenic Technologies
- Calibration and Measurement Techniques
- Space Science and Extraterrestrial Life
- Laser-induced spectroscopy and plasma
- Geochemistry and Geologic Mapping
- Geology and Paleoclimatology Research
- Scientific Research and Discoveries
- Spacecraft Design and Technology
- Geological and Geochemical Analysis
- Nuclear Physics and Applications
- Space exploration and regulation
- Spaceflight effects on biology
- High-pressure geophysics and materials
- Mineralogy and Gemology Studies
- Stellar, planetary, and galactic studies
- Infrared Target Detection Methodologies
- Methane Hydrates and Related Phenomena
- Distributed and Parallel Computing Systems
- Atmospheric Ozone and Climate
- Space Satellite Systems and Control
- Astronomical Observations and Instrumentation
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2016-2025
Royal Belgian Institute for Space Aeronomy
2025
Planet
2014-2024
Planetary Science Institute
2007-2024
Aerospace Institute (Germany)
2024
Bellingham Technical College
2023
Institut für Lungenforschung
2008-2023
Dienstleistungszentrum Ländlicher Raum
2019-2020
European Space Research and Technology Centre
2015
Laboratory for Atmospheric and Space Physics
2008
Hotspots on Venus The surface of shows clear signs volcanism, but are there active volcanoes today? answer to this question will bear our understanding the planet's climate evolution and interior dynamics. Using thermal emissivity data returned by Express spacecraft, Smrekar et al. (p. 605 , published online 8 April) looked at three hotspots Venus. These places were identified analogy with terrestrial like Hawaii, which believed overlie mantle plumes be most likely sites for current volcanic...
Abstract Martian moons exploration, MMX, is the new sample return mission planned by Japan Aerospace Exploration Agency (JAXA) targeting two with scheduled launch in 2024 and to Earth 2029. The major scientific objectives of this are determine origin Phobos Deimos, elucidate early Solar System evolution terms volatile delivery across snow line terrestrial planets having habitable surface environments, explore evolutionary processes both Mars environment. To achieve these objectives, during a...
Mercury's regolith, derived from the crustal bedrock, has been altered by a set of space weathering processes. Before we can interpret composition, it is necessary to understand nature these surface alterations. The processes that weather are same as those form exosphere (micrometeoroid flux and solar wind interactions) moderated local environment presence global magnetic field. To comprehend how acts on an understanding needed contributing act interactive system. As no direct information...
Abstract Landforms unique to Mercury, hollows are shallow, flat‐floored irregular depressions notable for their relatively high reflectance and characteristic color. Here we document the range of geological settings in which occur. Most associated with impact structures (simple bowl‐shaped craters multiring basins, ranging from Kuiperian Calorian age). Hollows found low‐reflectance material global color unit blue plains, but they appear be absent high‐reflectance red plains. may occur...
Abstract The plume of Enceladus is unique in the solar system providing direct access to fresh material from an extraterrestrial subsurface ocean. Cassini Mission, though not specifically designed for it, was able take advantage conduct best characterization date Evidence gathered multiple instruments points a global, liquid water ocean rich salts and organic compounds, with water-rock interactions occurring presumably hydrothermal systems at or below moon’s sea floor. Meeting criteria...
Abstract The dual spacecraft mission BepiColombo is the first joint between European Space Agency (ESA) and Japanese Aerospace Exploration (JAXA) to explore planet Mercury. was launched from Kourou (French Guiana) on October 20th, 2018, in its packed configuration including two spacecraft, a transfer module, sunshield. cruise trajectory long journey into inner heliosphere, it includes one flyby of Earth (in April 2020), Venus 2020 August 2021), six Mercury (starting before orbit insertion...
Deep understanding of planetary habitability requires identifying key factors that govern the surface environment over time. Venus is ultimate control case for how Earth developed and maintained conditions suited to life. very likely had elements essential such as past water a dynamo. Tectonism volcanism, which create chemical disequilibrium, persist today. What caused diverge down different evolutionary paths? VERITAS would foundational, co-registered data sets high-resolution topography,...
The Venus Express spacecraft images the nightside thermal emissions using Visible and Infrared Thermal Imaging Spectrometer (VIRTIS). At 1.02, 1.10, 1.18 μ m, emission from surface is observed. signal attenuated by scattering absorption in dense atmosphere. measured flux at top of atmosphere positively correlated with temperature emissivity. relatively well constrained as being mainly a function altitude gradient lesser or equal to adiabatic lapse rate. This study examines correlation VIRTIS...
During MESSENGER's first flyby of Mercury, the Mercury Atmospheric and Surface Composition Spectrometer made simultaneous mid-ultraviolet to near-infrared (wavelengths 200 1300 nanometers) reflectance observations surface. An ultraviolet absorption (<280 suggests that ferrous oxide (Fe2+) content silicates in average surface material is low (less than 2 3 weight percent). This result supported by lack a detectable 1-micrometer Fe2+ band high-spatial-resolution spectra mature materials as...
Abstract We present new observations of pyroclastic deposits on the surface Mercury from data acquired during orbital phase MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) mission. The global analysis brings total number such identified features 40 to 51. Some 90% are found within impact craters. locations most appear be unrelated regional smooth plains deposits, except some cluster around margins plains, similar relation between many lunar maria. A survey...
The thermal infrared imager TIR onboard Hayabusa2 has been developed to investigate thermo-physical properties of C-type, near-Earth asteroid 162173 Ryugu. is one the remote science instruments on designed understand nature a volatile-rich solar system small body, but it also significant mission objectives provide information surface physical and conditions for sampling site selection as well assessment safe landing operations. based two-dimensional uncooled micro-bolometer array inherited...
Abstract Launched onboard the BepiColombo Mercury Planetary Orbiter (MPO) in October 2018, Radiometer and Thermal Infrared Spectrometer (MERTIS) is on its way to planet Mercury. MERTIS consists of a push-broom IR-spectrometer (TIS) radiometer (TIR), which operate wavelength regions 7-14 μm 7-40 μm, respectively. This region characterized by several diagnostic spectral signatures: Christiansen feature (CF), Reststrahlen bands (RB), Transparency (TF), will allow us identify map rock-forming...
Abstract BepiColombo has a larger and in many ways more capable suite of instruments relevant for determination the topographic, physical, chemical mineralogical properties Mercury’s surface than carried by NASA’s MESSENGER spacecraft. Moreover, BepiColombo’s data rate is substantially higher. This equips it to confirm, elaborate upon, go beyond MESSENGER’s remarkable achievements. Furthermore, geometry orbital science campaign, beginning 2026, will enable make uniformly resolved...
Abstract In this work we discuss various selected mission concepts addressing Venus evolution through time. More specifically, address investigations and payload instrument supporting scientific goals open questions presented in the companion articles of volume. Also included are their related (observations & modeling) discussion which measurements future data products needed to better constrain Venus’ atmosphere, climate, surface, interior habitability A new fleet missions has been...