In astronomy and planetary science, a magnetosphere is a region of space surrounding an astronomical object in which charged particles are affected by that object's magnetic field. It is created by a celestial body with an active interior dynamo.
The solar wind is a stream of charged particles released from the upper atmosphere of the Sun, called the corona. This plasma mostly consists of electrons, protons and alpha particles with kinetic energy between 0.5 and 10 keV. The composition of the solar wind plasma also includes a mixture of materials found in the solar plasma: trace amounts of heavy ions and atomic nuclei of elements such as C, N, O, Ne, Mg, Si, S, and Fe. There are also rarer traces of some other nuclei and isotopes such as P, Ti, Cr, 54Fe and 56Fe, and 58Ni, 60Ni, and 62Ni. Superimposed with the solar-wind plasma is the interplanetary magnetic field. The solar wind varies in density, temperature and speed over time and over solar latitude and longitude. Its particles can escape the Sun's gravity because of their high energy resulting from the high temperature of the corona, which in turn is a result of the coronal magnetic field. The boundary separating the corona from the solar wind is called the Alfvén surface.
The National Space Centre is a museum and educational resource covering the fields of space science and astronomy, along with a space research programme in partnership with the University of Leicester. It is located on the north side of the city in Belgrave, Leicester, England, next to the River Soar. Many of the exhibits, including upright rockets, are housed in a tower with minimal steel supports and a semi-transparent cladding of ETFE 'pillows' which has become one of Leicester's most recognisable landmarks. The National Space Centre is a registered charity with a board of trustees.
MESSENGER was a NASA robotic space probe that orbited the planet Mercury between 2011 and 2015, studying Mercury's chemical composition, geology, and magnetic field. The name is a backronym for "Mercury Surface, Space Environment, Geochemistry, and Ranging", and a reference to the messenger god Mercury from Roman mythology.
Don Leslie Lind was an American scientist, naval officer, aviator, and NASA astronaut. He graduated from the University of Utah with an undergraduate degree in physics in 1953. Following his military service obligation, he earned a PhD in high-energy nuclear physics from the University of California, Berkeley in 1964.
Cluster II is a space mission of the European Space Agency, with NASA participation, to study the Earth's magnetosphere over the course of nearly two solar cycles. The mission is composed of four identical spacecraft flying in a tetrahedral formation. As a replacement for the original Cluster spacecraft which were lost in a launch failure in 1996, the four Cluster II spacecraft were successfully launched in pairs in July and August 2000 onboard two Soyuz-Fregat rockets from Baikonur, Kazakhstan. In February 2011, Cluster II celebrated 10 years of successful scientific operations in space. In February 2021, Cluster II celebrated 20 years of successful scientific operations in space. As of March 2023, its mission has been extended until September 2024. The China National Space Administration/ESA Double Star mission operated alongside Cluster II from 2004 to 2007.
Michele Karen Dougherty is a Professor of Space Physics at Imperial College London. She is leading unmanned exploratory missions to Saturn and Jupiter and is Principal Investigator for J-MAG – a magnetometer for the European Space Agency's Jupiter Icy Moons Explorer, due for launch in April 2023.
Margaret Ebunoluwa Aderin-Pocock is a British space scientist and science educator. She is an honorary research associate of University College London's Department of Physics and Astronomy, and has been the chancellor of the University of Leicester since February 2023. Since February 2014, she has co-presented the long-running astronomy television programme The Sky at Night with Chris Lintott. In 2020 she was awarded the Institute of Physics William Thomson, Lord Kelvin Medal and Prize for her public engagement in physics. She is the first black woman to win a gold medal in the Physics News Award and she served as the president of the British Science Association from 2021 to 2022.
Mercury's magnetic field is approximately a magnetic dipole apparently global, on planet Mercury. Data from Mariner 10 led to its discovery in 1974; the spacecraft measured the field's strength as 1.1% that of Earth's magnetic field. The origin of the magnetic field can be explained by dynamo theory. The magnetic field is strong enough near the bow shock to slow the solar wind, which induces a magnetosphere.
David John Southwood is a British space scientist who holds the post of Senior Research Investigator at Imperial College London. He was the President of the Royal Astronomical Society from 2012–2014, and earlier served as the Director of Science and Robotic Exploration at the European Space Agency (2001–2011). Southwood's research interests have been in solar–terrestrial physics and planetary science, particularly magnetospheres. He built the magnetic field instrument for the Cassini Saturn orbiter.
Margaret Galland Kivelson is an American space physicist, planetary scientist, and distinguished professor emerita of space physics at the University of California, Los Angeles. From 2010 to the present, concurrent with her appointment at UCLA, Kivelson has been a research scientist and scholar at the University of Michigan. Her primary research interests include the magnetospheres of Earth, Jupiter, and Saturn.
Solar wind Magnetosphere Ionosphere Link Explorer (SMILE) is a planned joint venture mission between the European Space Agency and the Chinese Academy of Sciences. SMILE will image for the first time the magnetosphere of the Sun in soft X-rays and UV during up to 40 hours per orbit, improving our understanding of the dynamic interaction between the solar wind and Earth's magnetosphere. The prime science questions of the SMILE mission are
Jennifer Anne MacKinnon "Jenni" Sidey-Gibbons is a Canadian astronaut, engineer, and academic. She was selected by the Canadian Space Agency (CSA) as one of the two members of the 2017 CSA Group alongside Joshua Kutryk.
Elizabeth "Libby" Anne Jackson is a British space exploration expert who works for the UK Space Agency.
Sheila Pearson is a British astronomer and the Education, Outreach and Diversity Officer at the Royal Astronomical Society.
Vinita Marwaha Madill is a British Space Operations engineer and science communicator. She is based at the European Space Agency through TERMA B.V. in the Netherlands, where she is responsible for the development of the European Robotic Arm. She founded the platform Rocket Women, which uses stories and interviews to encourage women to study STEM.
Suzanne Lyn Sheehy is an Australian accelerator physicist who runs research groups at the universities of Oxford and Melbourne, where she is developing new particle accelerators for applications in medicine.
Emma J. Bunce is a British space physicist and Professor of Planetary Plasma Physics at the University of Leicester. She holds a Royal Society Wolfson Research Merit Award. Her research is on the magnetospheres of Saturn and Jupiter. She is principal investigator (PI) of the MIXS instrument on BepiColombo, was deputy lead on the Jupiter Icy Moons Explorer proposal, and co-investigator on the Cassini–Huygens mission.
Rumi Nakamura is an Earth scientist at the Austrian Academy of Sciences. She works on solar-terrestrial interactions, with a particular focus on the terrestrial magnetosphere. Nakamura won the 2014 European Geosciences Union Julius Bartels Medal.
Mei-Ching Hannah Fok is a planetary scientist at the Goddard Space Flight Center. She was awarded the NASA Exceptional Scientific Achievement Medal in 2011 and elected a Fellow of the American Geophysical Union in 2019. She has worked on the IMAGE, Van Allen Probes and TWINS missions.
