In our daily lives, we rely on weather forecasts to know whether it will rain tomorrow. The monitoring and prediction of space weather such as geomagnetic storms and substorms are also vital for the operation safety of satellites outside the atmosphere and the living conditions of astronauts in space. However, space weather is far more unpredictable than the weather on Earth, which depends on in-situ measurements of plasma parameters by satellites.

A research team, led by Prof. Wang Yuming and Prof. Shan Xu from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences, developed a low-energy ion spectrometer (LEIS) onboard a Chinese geosynchronous satellite, the BeiDou-3 satellite.

The LEIS is designed for measurement of the ion energy per charge distribution with good energy-, angular-, and temporal-resolutions, which is helpful for space weather monitoring and early warning. Recently, the scientific data acquired by the LEIS were published in Science China Technological Sciences.

Starting in 2012, the research team designed and realized the LEIS payload that meets the requirements of a magnetospheric mission. Through simulation and experimental tests, the LEIS payload had been valuated and calibrated, and it was finally finished in 2017.

Plate tectonics represents a defining framework of modern geoscience, accounting for large-scale features on Earth's surface, such as mountains and valleys, as well as the processes that shape them, like volcanoes and earthquakes. Present-day plate tectonics have not been observed on any other world in the solar system, and evidence of past activity on planets such as Mars and Venus is circumstantial.

On Nov. 29, 2021, NASA's Juno mission completed its 38th close flyby of Jupiter. As the spacecraft sped low over the giant planet's cloud tops, its JunoCam instrument captured this look at two of Jupiter's largest moons.