A key component of the STEREO mission is NRL's Sun Earth Connection Coronal and Heliospheric Investigation (SECCHI), a suite of five scientific telescopes that observe the solar corona and inner heliosphere from the surface of the Sun to the orbit of Earth.
Cartesian projection of the entire solar atmosphere as observed by NRL\'s SECCHI EUV telescopes at a temperature of 1.6 million degrees. The lower panels show the individual images from each telescope and the middle panel shows the geometric configuration of the STEREO spacecraft at the time the images were taken. SECCHI acquires such full maps of the sun every 10 to 20 minutes.
These unique observations are made in "stereo" by the two nearly identical solar-powered STEREO observatories with one observatory ahead of Earth in its orbit and the other trailing behind. The two observatories trace the flow of energy and matter from the Sun to Earth. The instruments aboard STEREO reveal the three-dimensional structure of coronal mass ejections, the powerful eruptions of plasma and magnetic energy from the Sun's outer atmosphere, or corona.
SECCHI Project Scientist and NRL researcher, Dr. Angelos Vourlidas, explains the significance of this opportunity for the 360-degree view of the Sun, "for the first time, we can take snapshots of the entire atmosphere of a star. To put it in perspective, before STEREO we were like a person trying to get the pulse of a city by watching through a half-open window - not an easy task. Now, STEREO has thrown wide open the window and we can watch the Sun and its activity in its full three-dimensional glory." Each STEREO telescope sees half the Sun at a time. By combining the two views, NRL researchers can map of the entire solar atmosphere continuously.
Before the three-dimensional view was available, researchers had to wait until an active region rotated across the visible-from-Earth disk in order to study the properties. The problem of having to wait for the proper views to appear is that the corona is highly variable, filled with regions that come and go in a matter of days and explosions that can alter the corona landscape in a matter of hours.
With this capability of a three-dimensional view of the Sun, Vourlidas sees the potential for advances in the field of heliophysics. "We can solve the puzzles behind the evolution and structure of the solar atmosphere, including its violent eruptions, because we will be able to observe every feature and source of activity at the same time all over the Sun and follow their connections that can extend to large distances around the Sun," he explains. This opportunity for the STEREO spacecraft to view the Sun in three-dimension will be available for the next eight years.
STEREO is the third mission in NASA's Solar Terrestrial Probes Program. STEREO is sponsored by NASA's Science Mission Directorate, Washington, D.C. The Goddard Science and Exploration Directorate manages the mission, instruments, and science center. The Johns Hopkins University applied Physics Laboratory, Laurel, Md., designed and built the spacecraft and is operating them for NASA during the mission.
Donna McKinney | EurekAlert!
First Juno science results supported by University of Leicester's Jupiter 'forecast'
26.05.2017 | University of Leicester
Measured for the first time: Direction of light waves changed by quantum effect
24.05.2017 | Vienna University of Technology
Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.
Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....
Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....
An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
24.05.2017 | Event News
23.05.2017 | Event News
22.05.2017 | Event News
26.05.2017 | Life Sciences
26.05.2017 | Life Sciences
26.05.2017 | Physics and Astronomy