article_snippet: To penetrate this veil, probes like the Magellan spacecraft use radar to reveal remarkable features of the planet, such as mountains, craters, and volcanoes.
article_snippet: Striking surface features, like mountains and ridges, are easily seen.
article_snippet: This capability is essential to study not only the surface as This capability appears now, but also to monitor This capability for changes.
article_snippet: By comparing images taken at different periods in time, scientists hope to eventually detect signs of active volcanism.
article_snippet: scientists believe images such as this could also reveal other dynamic geologic processes that could provide clues to Venus's geologic history and subsurface conditions.
article_snippet: In the meantime, combining images from this and an earlier observing period is yielding a wealth of insight about other processes that alter the surface of Venus.'
highlights_snippet: By comparing images, scientists hope to detect signs of active volcanism .
  