Names on the maps of Venus: A pre-MAGELLAN review

Burba, G. A.

doi:10.1007/bf00142406

Cited by 35 publications

(2 citation statements)

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“…Modeling of magnetic minerals on the Venus surface demonstrates that remnant magnetization is possible and perhaps has yet to be detected. Several spacecraft measurements have placed upper limits on the strength and location of crustal magnetization (Burba 1990;. However, latitudes south of 50°S remain viable for detection of surface remnant fields from an orbiter.…”

Section: Magnetic Fieldmentioning

confidence: 99%

VALENTInE: A Concept for a New Frontiers–Class Long-duration In Situ Balloon-based Aerobot Mission to Venus

et al. 2022

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Described here is a concept for a variable-altitude aerobot mission to Venus developed as part of the 2020 NASA Planetary Science Summer School in collaboration with NASA Jet Propulsion Laboratory. The Venus Air and Land Expedition: a Novel Trailblazer for in situ Exploration (VALENTInE) is a long-duration New Frontiers–class mission to Venus in alignment with the goals recommended by the 2013 Planetary Science Decadal Survey. VALENTInE would have five science objectives: (1) determine the driving force of atmospheric superrotation, (2) determine the source of D/H and noble gas inventory, (3) determine the properties that govern how light is reflected within the lower cloud later, (4) determine whether the tesserae are felsic, and (5) determine whether there is evidence of a recent dynamo preserved in the rock record. The proposed mission concept has a total duration of 15 Earth days and would float at an altitude of 55 km, along with five dips to a lower altitude of 45 km to study Venus’s lower atmosphere. The instrument payload allows for measurements of the atmosphere, surface, and interior of Venus and includes six instruments: an atmospheric weather suite, a mass spectrometer, a multispectral imager, a near-infrared spectrometer, light detection and ranging, and a magnetometer. Principle challenges included a limitation caused by battery lifetime and low technology readiness levels for aerobots that can survive the harsh conditions of Venus’s atmosphere. This preliminary mission was designed to fit within an assumed New Frontiers 5 (based on inflated New Frontiers 4) cost cap.

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Section: Magnetic Fieldmentioning

confidence: 99%

VALENTInE: A Concept for a New Frontiers–Class Long-duration In Situ Balloon-based Aerobot Mission to Venus

et al. 2022

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“…Spacecraft missions including Mariner 2 and 10 and Venera 9–12 failed to detect an Earth‐like magnetosphere at Venus (e.g., Russell, ). Venera 4 landed at 19° North, 38° East in Eistla Regio—then called the Eisila region (Burba, )—measuring magnetic fields down to 25 km but failing to detect crustal remanence (Dolginov et al, ; Russell, ). Pioneer Venus Orbiter supplied the strictest upper limit on any present‐day global field: ~10 − 5 times Earth ' s magnetic moment (Phillips & Russell, ).…”

Section: Introductionmentioning

confidence: 99%

Detectability of Remanent Magnetism in the Crust of Venus

O’Rourke

Buz

et al. 2019

Geophysical Research Letters

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Observations of planetary magnetic fields provide fundamental insights into the origin and evolution of terrestrial planets. However, whether Venus ever hosted a dynamo is unknown. Here we show that crustal remanent magnetism is a potentially observable consequence of an ancient Venusian dynamo, in contrast to previous studies that dismissed this possibility. Past spacecraft measurements only exclude crustal magnetization near the Venera 4 landing site and northward of 50° South latitude for >150‐km coherence scales and strong magnetization intensities. Magnetite grains with sizes commonly observed in volcanic rocks can retain thermoremanent magnetism at Venusian conditions for >1 billion years. Depths to the Curie temperature of magnetite are ~5–40 km and typically less than predicted crustal thicknesses at our analyzed localities. Aerial platforms could detect expected magnetizations at horizontal scales similar to the ~50‐km operating altitude. Any detection would validate models of planetary accretion, geologic processes, and climate history.

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Dorsum, Dorsa

Hargitai¹

2015

Encyclopedia of Planetary Landforms

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Names on the maps of Venus: A pre-MAGELLAN review

Abstract: The topographic features on Venus are named with female names

Cited by 35 publications

References 1 publication

VALENTInE: A Concept for a New Frontiers–Class Long-duration In Situ Balloon-based Aerobot Mission to Venus

VALENTInE: A Concept for a New Frontiers–Class Long-duration In Situ Balloon-based Aerobot Mission to Venus

Detectability of Remanent Magnetism in the Crust of Venus

Dorsum, Dorsa

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