Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

U-M instrument shows what planet Mercury is made of

07.07.2008
By measuring the charged particles in the planet Mercury's magnetic field, a University of Michigan sensor enabled the first observations about the surface and atmospheric composition of the closest world to the sun.

"We now know more about what Mercury's made of than ever before," said Thomas Zurbuchen, a professor in the departments of Atmospheric, Oceanic and Space Sciences and Aerospace Engineering. "Holy cow, we found way more than we expected!"

Zurbuchen is project leader of the Fast Imaging Plasma Spectrometer (FIPS), a soda-can sized sensor on board the MESSENGER spacecraft, which performed the first of three scheduled Mercury flybys in January. A paper on FIPS' results from this flyby is published in the July 4 edition of Science.

Since the Mariner 10 spacecraft's 1975 discovery of Mercury's magnetic field, scientists have speculated about how this magnetic field and the solar wind interact with the planet's surface and exosphere, or thin atmosphere.

FIPS detected silicon, sodium, sulfur and even water ions around Mercury. Ions are atoms or molecules that have lost electrons and therefore have an electric charge.

Because of the quantities of these molecules that scientists detected in Mercury's space environment, they surmise that they were blasted from the surface or exosphere by the solar wind. The solar wind is a stream of charged particles emanating from the sun. It buffets Mercury, which is 2/3 closer to the sun than the Earth, and it causes particles from Mercury's surface and atmosphere to sputter into space. FIPS measured these sputtered particles.

"It's like we did a forensic analysis of Mercury," Zurbuchen said. "This flyby got the first-ever look at surface composition.

"The Mercury magnetosphere is full of many ionic species, both atomic and molecular, and in a variety of charge states. What is in some sense a Mercury plasma nebula is far richer in complexity and makeup than the Io plasma torus in the Jupiter system."

Io is a volcanically active moon of Jupiter that is often considered one of the most exciting space environments, Zurbuchen said. Images and other measurements made by MESSENGER suggest that Mercury's surface composition was determined at least in part by volcanic processes.

FIPS was built at the University of Michigan by more than 10 U-M engineers and technicians with help from more than 50 students.

The paper is called "MESSENGER Observations of the Composition of Mercury's Ionized Exosphere and Plasma Environment."

Nicole Casal Moore | EurekAlert!
Further information:
http://www.umich.edu
http://messenger.jhuapl.edu/news_room/index.php
http://www.engin.umich.edu

More articles from Physics and Astronomy:

nachricht Unraveling the nature of 'whistlers' from space in the lab
15.08.2018 | American Institute of Physics

nachricht Early opaque universe linked to galaxy scarcity
15.08.2018 | University of California - Riverside

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: Unraveling the nature of 'whistlers' from space in the lab

A new study sheds light on how ultralow frequency radio waves and plasmas interact

Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...

Im Focus: New interactive machine learning tool makes car designs more aerodynamic

Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.

When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...

Im Focus: Robots as 'pump attendants': TU Graz develops robot-controlled rapid charging system for e-vehicles

Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.

Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....

Im Focus: The “TRiC” to folding actin

Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.

Actin is the most abundant protein in highly developed cells and has diverse functions in processes like cell stabilization, cell division and muscle...

Im Focus: Lining up surprising behaviors of superconductor with one of the world's strongest magnets

Scientists have discovered that the electrical resistance of a copper-oxide compound depends on the magnetic field in a very unusual way -- a finding that could help direct the search for materials that can perfectly conduct electricity at room temperatur

What happens when really powerful magnets--capable of producing magnetic fields nearly two million times stronger than Earth's--are applied to materials that...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Within reach of the Universe

08.08.2018 | Event News

A journey through the history of microscopy – new exhibition opens at the MDC

27.07.2018 | Event News

2018 Work Research Conference

25.07.2018 | Event News

 
Latest News

Unraveling the nature of 'whistlers' from space in the lab

15.08.2018 | Physics and Astronomy

Diving robots find Antarctic winter seas exhale surprising amounts of carbon dioxide

15.08.2018 | Earth Sciences

Early opaque universe linked to galaxy scarcity

15.08.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>