Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Earth's Magnetic Field - A Hazard For Lunar Astronauts?

17.04.2007
For four days every month the Moon passes through the magnetic field of the Earth and parts of the lunar surface are charged with static electricity.

Next week Dr Mike Hapgood of the Rutherford Appleton Laboratory will present a model at the Royal Astronomical Society National Astronomy Meeting in Preston, which suggests that this charging may increase after the year 2012 and become an important issue for future lunar explorers.

Once in every orbit around the Earth the Moon moves through the magnetic tail - the region on the nightside of the Earth where the magnetic field is drawn out into a million or more kilometre long tail pointing away from the Sun. In the middle of the tail there is a region full of energetic electrons and other charged particles (the plasmasheet). When the Moon passes through the plasmasheet these electrons can collect on parts of the lunar surface and charge them with static electricity. Observations from NASA’s Lunar Prospector spacecraft during 1998 confirm the existence of this charging.

Dr Hapgood’s model suggests that the exposure of the Moon to plasmasheet charging varies markedly over an 18-year cycle linked to changes in the Moon's orbit. This exposure was low at the time of the Apollo landings in the early 1970s and is low again today - but it was high in the 1990s and will rise again after 2012. The United States, Russia, India, Japan and China have all announced plans to send astronauts back to the Moon around the year 2020 – at the time when lunar surface charging is predicted to be high.

Lunar surface charging may be an important issue for future lunar exploration because it increases the risk of electric discharges, which can interfere with and damage sensitive electronics. It may also affect the behaviour of lunar dust, which is a recognised hazard for lunar astronauts as it can easily enter spacesuits, living quarters and equipment.

Dr Hapgood comments, “Electrical charging is one of the less well-known natural hazards of spaceflight. It’s important to understand it how this affects the Moon so spacecraft designers can use scientific knowledge to protect future explorers.”

Robert Massey | alfa
Further information:
http://www.ras.org.uk
http://www.nam2007.uclan.ac.uk/press.php

More articles from Physics and Astronomy:

nachricht New NASA study improves search for habitable worlds
20.10.2017 | NASA/Goddard Space Flight Center

nachricht Physics boosts artificial intelligence methods
19.10.2017 | California Institute of Technology

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Neutron star merger directly observed for the first time

University of Maryland researchers contribute to historic detection of gravitational waves and light created by event

On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...

Im Focus: Breaking: the first light from two neutron stars merging

Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.

Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....

Im Focus: Smart sensors for efficient processes

Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).

When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...

Im Focus: Cold molecules on collision course

Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.

How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...

Im Focus: Shrinking the proton again!

Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.

It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ASEAN Member States discuss the future role of renewable energy

17.10.2017 | Event News

World Health Summit 2017: International experts set the course for the future of Global Health

10.10.2017 | Event News

Climate Engineering Conference 2017 Opens in Berlin

10.10.2017 | Event News

 
Latest News

Terahertz spectroscopy goes nano

20.10.2017 | Information Technology

Strange but true: Turning a material upside down can sometimes make it softer

20.10.2017 | Materials Sciences

NRL clarifies valley polarization for electronic and optoelectronic technologies

20.10.2017 | Interdisciplinary Research

VideoLinks
B2B-VideoLinks
More VideoLinks >>>