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Exploring remote destinations on Earth and in space such as the Antarctic and Mars is of great significance to science and technology. Ultraviolet (UV) irradiation at those locations is usually strong due to the depletion or absence of ozone, which is often accompanied by strong visible light interference and harsh environments with extreme temperatures. Those exploration missions extensively utilize flexible and foldable membranes and shells to meet the extreme requirements on structural size and weight. Ultra‐flexible UV photodetectors (PDs) capable of surviving harsh environments with additional ability to integrate on flexible and foldable structures for in situ visible‐blind UV sensing are critical to the protection of human explorers and engineering materials. However, the development of such UV PDs remains challenging. Here, this work introduces wired and wireless optoelectronic devices based on visible‐blind, ultra‐flexible, sub‐micron nanocomposites of zinc oxide nanoparticles and single‐walled carbon nanotubes. In‐depth studies demonstrate their operation at cold and hot temperatures and low air pressure. Those PDs can employ flexible near‐field communication circuits for wireless, battery‐free data acquisition. Their ultra‐flexibility allows folding into a sharp crease and conformal integration to flexible and origami structures, bringing further opportunities for UV detection in demanding missions on Earth and in space.

 

The East Asian VLBI Network (EAVN) is an international VLBI facility in East Asia and is operated under mutual collaboration between East Asian countries, as well as part of Southeast Asian and European countries. EAVN currently consists of 16 radio telescopes and three correlators located in China, Japan, and Korea, and is operated mainly at three frequency bands, 6.7, 22, and 43 GHz with the longest baseline length of 5078 km, resulting in the highest angular resolution of 0.28 milliarcseconds at 43 GHz. One of distinct capabilities of EAVN is multi-frequency simultaneous data reception at nine telescopes, which enable us to employ the frequency phase transfer technique to obtain better sensitivity at higher observing frequencies. EAVN started its open-use program in the second half of 2018, providing a total observing time of more than 1100 h in a year. EAVN fills geographical gap in global VLBI array, resulting in enabling us to conduct contiguous high-resolution VLBI observations. EAVN has produced various scientific accomplishments especially in observations toward active galactic nuclei, evolved stars, and star-forming regions. These activities motivate us to initiate launch of the ’Global VLBI Alliance’ to provide an opportunity of VLBI observation with the longest baselines on the earth.