Magnetic fields sculpt
stellar growth
DR EMILY BALDWIN
ASTRONOMY NOW
Posted: September 10, 2009 ...
Magnetic Fields:
The concept of energy provided a unifying link for mechanical and thermal phenomena (remember our microscopic description of temperature as the motion of atoms).
Definition: magnetic field: A description of the strength of the magnetic force exerted by an object. Bar magnets have "di-polar" fields, as the force is exerted from the two ends of the bar.
MAGNETIC FIELD AND MAGNETOSPHERE
Neptune, like most of the planets in the solar system, possesses an internal magnetic field.
Magnetic field
Wikipedia, the free encyclopedia - Cite This Source
In physics, the magnetic field is a field that permeates space and which exerts a magnetic force on moving electric charges and magnetic dipoles.
[edit] Magnetic field reversals
Main article: Geomagnetic reversal ...
The magnetic field at all these points is already so weak that the solar wind overpowers it and shifts its field lines, while its own motion--radially outward--remains unchanged. We will now derive the shape of those lines.
The Magnetic Field of
Jupiter
Jupiter has a large, complex, and intense magnetic field that is thought to arise from electrical currents in the rapidly spinning metallic hydrogen interior.
Magnetism and Magnetic Fields
A force field generated by moving electrical charges. An electrical current running through a loop of wire generates a magnetic field. The strength of the field depends on the current and area of the wire loop.
Planet Atmospheres and Magnetic Fields
This data is from the National Space Science Data Center's Fact Sheet site. Click on a planet's name to bring up the fact sheet at NSSDC. I have put together a list of links to excellent tours of each planet.
The Galileo spacecraft exploring the area around Jupiter revealed that Ganymede has its own magnetic field. The stirring of its molten core of iron sulfide may have generated the magnetic field.
Definition: interplanetary magnetic field (IMF): The magnetic field carried with the solar wind.
Space Tragedies9 Planets in Nine DaysAstronomy 101
Related Articles ...
magnetic field Field which accompanies any changing electric field, and governs the influence of magnetized objects on one another.
magnetosphere A zone of charged particles trapped by a planet's magnetic field, lying above the atmosphere.
Magnetic Field.
Much of the sun's magnetic field lies outside of sunspots. The pervasiveness of the sun's magnetic field adds complexity, diversity, and beauty to the outer atmosphere of the sun.
Magnetic field: the area around a planet that has a magnetic force
Satellite: a natural moon or man-made object that orbits a planet or other object
Evolution: a process of change in a certain direction ...
magnetic field-- The portion of space near a body in which a magnetic force can be detected
magnetic storm--Occurs when magnetospheric substorms become strong, prolonged, and intense ...
Magnetic field
Jupiter has a magnetic field which, at the height of the cloud layer, is more than 10 times that of the Earth.
Magnetic Fields
Magnetic Moment
(a) A measure of the extent to which a physical system (e.g. an atom, or nucleus, or particle) behaves like a tiny magnet. It is generally measured in units of magnetons, i.e. e / 2mc.
Magnetic Field: Magnetism is produced in the Sun by the flow of electrically charged particles: ions and electrons.
Magnetic Field and Core
In 1980, The Pioneer Venus Orbiter found that Venus' magnetic field is both weaker and smaller (i.e. closer to the planet) than Earth's.
Magnetic field- the field responsible for magnetic forces, now incorporated along with the electric field, into the electromagnetic field ...
Magnetic field: The region of "altered space" that will interact with the magnetic properties of a magnet. It is located mainly between the opposite poles of a magnet or in the energetic space about an electric charge in motion.
magnetic field
The region surrounding an object which has a changing electric field. Most stars and planets have magnetic fields which will affect charged particles coming in contact with them.
Magnetic Field Lines
imaginary lines that indicate the strength and direction of a magnetic field. The orientation of the line and an arrow show the direction of the field. The lines are drawn closer together where the field is stronger.
Geomagnetic Field. The magnetic field observed in and around the Earth. The intensity of the magnetic field at the Earth's surface is approximately 0.32 gauss at the equator and 0.62 gauss at the north pole.
Solar Magnetic Fields
Magnetism is the key to understanding the Sun. Magnetism, or magnetic field, is produced on the Sun by the flow of electrically charged ions and electrons.
Magnetic field lines
These lines are a way to show the structure of a magnetic field. A compass needle will always point along a field line. The lines are close together where the magnetic force is strong, and spread out where it is weak.
MAGNETIC FIELD
A magnetic field is a region near a magnet where other magnets are affected. The Earth's magnetic field is probably caused by its molten iron-nickel core.
Magnetic Field: Jupiter has a very strong magnetic field. The magnetic field is probably generated as the planet spins its deep metallic-hydrogen layer with electrical currents .
Magnetic Field
The area near a planet where magnetic forces can be detected.
MMU ...
Magnetic field on Moon is not polarized; worthless for navigation
14
Fifteen liters of water ...
Magnetic Field
A region of space in which magnetic forces may be detected or may affect the motion of an electrically charged particle.
magnetic field Field which accompanies any electric current or changing electric field, and governs the influence of magnetized objects on one another.
Magnetic field interactions between giant stars Aa and Ab are thought to energize the corona
of the larger star (Aa), generating more x-rays than would be expected for a single star (more) ...
Magnetic field
A magnetism field is a vector field which can exert a magnetic force on moving electric charges and on magnetic dipoles . When placed in a magnetic field, magnetic dipoles tend to align their axes parallel to the magnetic field....
Magnetic field lines would ordinarily repel each other, causing sunspots to disperse rapidly, but sunspot lifetime is about two weeks.
Magnetic Fields Investigation (MAG/ER) - Mario Acuna, Goddard Space Flight Center
A magnetometer will be used to determine whether Mars has a magnetic field, and the strength and orientation of the field if one exists.
Magnetic fields have been measured in some 30 degenerates of the DA and DC type (Bergeron et al. 1992). Strong magnetic fields are also present in cataclysmic variables (degenerates accreting matter from a companion star).
Magnetic Field
A condition found in the region around a magnet or an electric current, characterized by the existence of a detectable magnetic force at every point in the region and by the existence of magnetic poles.
The magnetic field is three-dimensional. Generates and sustains magnetic fields that are turbulent. The Alfvén waves are vibrations in the magnetic field lines. The waves propagate along the field lines. This force is the new dynamic element.
The magnetic field of the Earth will trap the charged particles generated by the Sun. When they collide with molecules and atoms in the air, the molecules and atoms will emit light. These are called the aurora.
Courtesy NASA.
The magnetic field is important for the Earth since it helps to protect us from the high-energy particles from the Sun. Such particles are usually deflected by the field, though some particles are trapped for a while in the Van Allen Belts.
The magnetic field is well-ordered in many jets, as shown by polarization measurements. Synchrotron radiation can be very highly polarized (50%) if the field is globally ordered, and some sources apprach this level.
Uranus' magnetic field is odd in that it is not centered on the center of the planet and is tilted almost 60 degrees with respect to the axis of rotation. It is probably generated by motion at relatively shallow depths within Uranus.
The sun's magnetic field has a surface strength of 2 gauss. It reverses with a period of 22 y (twice the period of the sunspot cycle).
Jupiter's magnetic field is large, complex, and intense. It is thought to arise from electrical currents in the rapidly spinning metallic hydrogen interior.
The intense magnetic field and plasma that are believed to surround a neutron star provide an effective source of radio waves.
geomagnetic field measurement (in geomagnetic field (geophysics); in Alexander von Humboldt (German explorer and naturalist): Later years )
optics (in optics: Historical background; in optics: The Gauss theory of lenses ) ...
Figure: The magnetic field of a neutron star produces beams of radiation which emerge along the magnetic axis. This Lighthouse effect causes periodic flashes. The pole more aligned with our line of sight produces stronger pulses.
An electromagnetic device that transmits the direction of a magnetic field from one coil to another, used to transmit measurements electrically from a point of measurement to an indicator in a remote-indicating system.
Penning discharge A direct-current discharge where electrons are forced to oscillate between two opposed cathodes and are restrained from going to the surrounding anode by the presence of a magnetic field.
Two points on the earth's surface, at opposite ends of a geomagnetic field line. CONTINUUM STORM (CTM). General term for solar noise lasting for hours and sometimes days. COORDINATED UNIVERSAL TIME.
Electromagnetic Radiation Radiation that travels through vacuous space at the speed of light and propagates by the interplay of oscillating electric and magnetic fields. This radiation has a wavelength and a frequency.
The constellation Canes Venatici (the Hunting Dogs) is best known for its luminary, Cor Caroli (Alpha-2 Canum Venaticorum), a class A magnetic star with a magnetic field 1500 times the strength of the Sun's. Such stars are not all that rare.
A type of magnetic cataclysmic binary that consists of a closely-orbiting dwarf M star or K star and a super-strong magnetic white dwarf primary, in which the magnetic field of the primary not only prevents the formation of an accretion disk but also ...
Their helical motion around the magnetic field lines of the Galaxy causes their distribution to appear isotropic (they are detected equally in all directions), even though astronomers believe that they originate in the shocks of supernova remnants.
We speak of light as a wave phenomenon; if you like, think of light as waves of electric and magnetic field moving through space.
MAGNETOHYDRODYNAMICS (MHD) - The study of the interaction between a magnetic field and plasma treated as a continuous medium. Most of the universe contains not normal gas, but instead plasma.
Mercury's iron core may also be responsible for one of the most surprising findings from Mariner 10 - the planet's weak magnetic field, 100 times weaker than Earth's.
Some neutron stars spin quite rapidly and have very strong magnetic fields. If the magnetic poles are not lined up with the star's rotation axis then the magnetic field precesses around at an alarming rate.
 See also: Field, Earth, Sun, Solar, Light
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