On January 3, 03:26 Swedish time, the Chinese Chang'E-4 spacecraft landed successfully on the far side of the Moon. The Swedish Institute of Space Physics (IRF) has developed one of the scientific instruments on board. The aim of the instrument is to study how the solar wind interacts with the lunar surface.

It is an historic event as it is the first time a spacecraft is landing on the far side of the Moon. It is also the second time Swedish instrumentation is used on the lunar surface; 50 years ago Hasselblad cameras were used during the Apollo missions.

The Advanced Small Analyzer for Neutrals (ASAN) instrument was developed by the Swedish Institute of Space Physics in Kiruna - in collaboration with the Chinese National Space Science Center (NSSC).

The instrument investigates how the solar wind, a flow of charged particles from the Sun, interacts with the lunar surface. ASAN is mounted on the rover of Chang'E-4, which makes it possible to perform measurements at different locations. The measurements could shed light on the processes responsible for the formation of water on the Moon.

"The successful landing means that Sweden is back on the Moon and this is exciting. The next step for ASAN is the instrument commissioning. The first science data are expected before February, 11th," says Martin Wieser, researcher at the Swedish Institute of Space Physics and principal investigator of ASAN.

Landing on the lunar far side is complex as the landing site is not visible from Earth. To communicate with the lander, the Chinese National Space Agency (CSNA) has previously launched the Queqiao communication relay satellite into a halo orbit about 65,000 km further out than the Moon.

Even after the landing there are challenges for Chang'E-4. The rover needs solar power to operate. After sunset, this power source is not available and the temperatures will drop significantly during the two-week-long lunar night.

"The lunar night is especially difficult, but both the rover and our instrument are designed to withstand these extreme conditions. ASAN is mounted inside a thermally insulated payload compartment that is open during daytime and closed during night time to cope with the low temperatures. We keep our fingers crossed that all systems will work as designed," says Martin Wieser.

Related Links
Swedish Institute Of Space Physics
Mars News and Information at MarsDaily.com
Lunar Dreams and more

Tweet

Thanks for being here; We need your help. The Space Media Network continues to grow but revenues have never been harder to maintain. With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords. Our news coverage takes time and effort to publish 365 days a year. If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.
SpaceMediaNetwork Contributor $5 Billed Once credit card or paypal		SpaceMediaNetwork Monthly Supporter $5 Billed Monthly paypal only

Women will make up to half of Russia-US Moon flight simulation crew
Moscow (Sputnik) Jan 01, 2019
Women will account for up to half of the crew that will be engaged in the second stage of a joint Russia-US project SIRIUS, which is designed to simulate the conditions of a flight to the Moon, Mark Belakovsky, a representative of the Institute of Biomedical Problems of the Russian Academy of Sciences (IBMP RAS), said. "On 9-10 January [2019], there will be a medical commission that will select 10 people, who will begin their training starting from January 14. The crew will comprise six people. In ... read more