The European Space Agency (ESA) is moving forward with the development of a robotic mission to Venus, known as Envision, following concerns that NASA may not deliver a promised U.S.-built radar instrument. This instrument was a key component for the mission, which aims to explore the planet's surface in greater detail than ever before. According to the mission's project scientist, the ESA will continue with the mission even if NASA does not fulfill its commitment. Venus, often called Earth's "twin" due to its similar size and mass, is shrouded in a dense layer of sulfuric acid clouds, which make it impossible to observe its surface using traditional optical cameras from space. Scientists rely on radar technology to penetrate these clouds and map the planet's terrain. Envision is expected to produce maps of Venus with a resolution 10 times better than the last U.S. radar mission to the planet, which was launched in the 1990s. This enhanced resolution will allow researchers to search for signs of active volcanism and other geological activity on Venus. In 2024, NASA and ESA signed a memorandum of understanding to collaborate on the Envision mission. Under the agreement, NASA was to provide a synthetic aperture radar (SAR) instrument, which is a type of advanced radar that can create high-resolution images of the surface. NASA was also to support the mission by using its Deep Space Network, a global system of large radio antennas that help communicate with spacecraft beyond Earth's orbit. In return, ESA agreed to include U.S. researchers in the mission's science team. The Envision spacecraft, along with its other scientific instruments, will be built by Europe. The mission will be launched using an Ariane 6 rocket, also developed by Europe. Despite the uncertainty surrounding NASA's contribution, the ESA remains committed to the mission, highlighting the importance of international collaboration in space exploration. The success of Envision could significantly enhance our understanding of Venus and its potential for geological activity, offering valuable insights into the evolution of planets in our solar system.