China’s first solar probe, Advanced Space-based Solar Observatory

Liftoff! A mission aims to touch the sun.


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China’s first solar probe, Advanced Space-based Solar Observatory 1

China’s first solar probe, Advanced Space-based Solar Observatory, is scheduled to be launched in the first half of 2022, marking the country’s first-ever mission to “touch” the sun.

The satellite will operate in a sun-synchronous orbit 720 kilometers above Earth to keep a close tab on the sun 24 hours a day. About 1,000 kilograms, the satellite is expected to orbit the sun for at least four years, according to the Purple Mountain Observatory of the Chinese Academy of Sciences, a research institute based in Nanjing, east China’s Jiangsu Province.

The main scientific objectives of the probe include observing the sun’s magnetic field and two major eruptive phenomena, or bursts on the star, are solar flares and Coronal Mass Ejections. It will deploy three payloads, including Full disk Vector MagnetoGraph, Hard X-ray Imager, and Lyman-alpha Solar Telescope.

China’s first solar probe, Advanced Space-based Solar Observatory 5

The sun has been the only fixed star that can be studied in detail by humans. Most of its radiation is blocked by Earth’s atmosphere. Only by sending probes into space can a complete picture of the sun be presented for further studies.

As the sun’s temper varies on an 11-year cycle and the star enters Solar Cycle 25, it is estimated to reach its peak radiation around 2025.

The solar probe can help obtain detailed records of solar activity during its rise to the peak years, said Gan Weiqun, a researcher with the institute.

The satellite will also realize its potential in space weather forecasting. The CMEs can be detected at least 40 hours ahead of their arrival by the observatory, which is expected to further facilitate early warnings of damage to Earth’s electromagnetic environment.

Since the 1960s, more than 70 satellites related to solar observation have been launched globally. The ASO-S is expected to plug China’s gap in the field, according to Gan


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