Thetis Regio

region, Venus

Written by

The Information Architects of Encyclopaedia Britannica

Last updated

July 17, 2026

Quick Summary

Thetis Regio is a region on the planet Venus. It is part of Aphrodite Terra, one of the three continent-sized highland areas on Venus. Aphrodite Terra is comparable in surface area to Africa and lies mostly between 1 and 5 km (0.6 and 3 miles) above the planet's mean radius. Thetis Regio, along with Ovda Regio, forms the main part of Aphrodite Terra. This terrain is primarily composed of tessera, which is characterized by extremely rugged and highly deformed landscapes with intersecting ridges and troughs, likely formed by multiple episodes of mountain building and faulting. The surface of Venus is generally dry and rocky, with extensive plains and volcanic features.12

Summary created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

3 Britannica Sources

Ask Britannica AI about this topic

Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.

Aphrodite Terra
… in the central part and Thetis Regio farther east. Ovda spans about 4,000 km (2,500 miles) from north to south; Thetis, about 3,000 km (1,900 miles). Both are composed primarily of tessera (Latin: “mosaic tile”) terrain. Extraordinarily rugged and highly deformed, tessera terrain typically displays several different trends of parallel…
Read More
… in the central part and Thetis Regio farther east. Ovda spans about 4,000 km (2,500 miles) from north to south; Thetis, about 3,000 km (1,900 miles). Both are composed primarily of tessera (Latin: “mosaic tile”) terrain. Extraordinarily rugged and highly deformed, tessera terrain typically displays several different trends of parallel…
Read More