Why it matters

Mead sets the scale for the Venus section and asks the interface to explain radar imagery.

What happenedThe largest known impact structure on Venus, expressed through radar data.
Why it mattersMead sets the scale for the Venus section and asks the interface to explain radar imagery.
How scientists knowGazetteer of Planetary Nomenclature; NASA Image and Video Library

Measurements and uncertainty

القطر270 km
Depthnot listed
Agerelative to Venus's young surface
الحالةمؤكدة
Coordinates12.500° N / 57.200° E
Record levelextended

Extended record: core parameters have an editorial baseline, while age, depth, and preservation still require primary-source review.

الوصف العلمي

The structure shows ring morphology, radar-bright ejecta, and the relationship between impact forms and Venusian terrain.

Data provenanceGazetteer of Planetary Nomenclature; NASA Image and Video Library

معرض إعادة البناء

قراءات بصرية أعمق للفوهة

إذا لم تكفِ الصورة الموثقة، تُستكمل البطاقة بإعادة بناء علمية: ليست خيالاً بدلاً من الحقيقة، بل فرضية بصرية منفصلة بوضوح عن المصادر.

لوحة هذا العالمVenusian amber, radar, and dense atmosphere
Radar imagery reveals the surface through the dense atmosphere.
المعاينة البصرية الحاليةالبطاقة الأساسية: مصدر أو مادة مدارية أو لوحة تحريرية يبدأ منها التحليل البصري.
Reverse reconstructionmoving from the present trace back to the impact event
Chronological inversionreading the object from future state back through earlier layers
The present as an archive of the futuretreating today's profile as evidence for future analysis

Visual reconstruction

Reverse reconstruction → Chronological inversion → Bidirectional analysis → The present as an archive of the future

تحتاج كل بطاقة إلى معاينة بصرية: صورة موجودة، مصدر معالج جمالياً، أو إعادة بناء علمية.

Reverse reconstructionmoving from the present trace back to the impact event
Chronological inversionreading the object from future state back through earlier layers
Bidirectional analysischecking past-to-present and present-to-past interpretations
The present as an archive of the futuretreating today's profile as evidence for future analysis

تاريخ البحث

Its detailed image is primarily associated with Magellan radar mapping.

المصادر

CSVJSONMead. Crater.world record. Last reviewed 2026-05-08.
Last reviewed
2026-05-08
Source baseline
Gazetteer of Planetary Nomenclature; NASA Image and Video Library
Uncertainty note
Extended record: core parameters have an editorial baseline, while age, depth, and preservation still require primary-source review.
Gazetteer of Planetary NomenclatureInternational Astronomical Union / USGSNASA Image and Video LibraryNASA

Education mode

حقائق

  • Venus has few very small craters because of its dense atmosphere.
  • Mead is named after anthropologist Margaret Mead.
Glossaryejecta, impact melt, breccia, central peak, erosion
Classroom questionWhich evidence separates an impact crater from a volcanic caldera?
CompareDickinson