Why it matters

Valhalla shows that in the outer Solar System a crater can be not a bowl, but an entire planetary-scale ring system.

What happenedA giant multi-ring impact structure on Callisto whose scale makes it one of the anchor objects of the outer catalog.
Why it mattersValhalla shows that in the outer Solar System a crater can be not a bowl, but an entire planetary-scale ring system.
How scientists knowGazetteer of Planetary Nomenclature; NASA Image and Video Library

Measurements and uncertainty

直径3,000 km
Depthnot listed
Ageancient ringed feature
状态已确认
Coordinates14.700° N / 56.000° W
Record levelextended

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

科学档案

Valhalla's rings read as the response of an ice-rock crust to a giant impact, useful for comparing impact mechanics across small and large bodies.

Data provenanceGazetteer of Planetary Nomenclature; NASA Image and Video Library

重建图廊

更多陨石坑视觉解读

如果已验证图像不足，档案会补充科学重建：不是用幻想替代事实，而是与来源清晰区分的视觉假设。

世界调色icy turquoise, deep space, and distant moons
Scientific reconstruction: ringed basin on Callisto's dark icy surface.
当前视觉预览基础图版：来源图像、轨道资料或编辑图版，视觉解读从这里开始。
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

每张档案都需要视觉预览：现有图像、经过美学处理的来源，或科学重建图。

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

研究历史

The feature is listed in the IAU/USGS planetary nomenclature and is known from missions to the Jupiter system.

来源

CSVJSONValhalla on Callisto. 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

事实

  • Official Gazetteer diameter: about 3000 km.
  • The name refers to Valhalla from Norse mythology.
  • For the site, it anchors the Jupiter-moons branch.
Glossaryejecta, impact melt, breccia, central peak, erosion
Classroom questionWhich evidence separates an impact crater from a volcanic caldera?
CompareOccator