Comets and the history of our Solar System
... dust in the outskirts of our Solar System. Through small orbital perturbations (for instance, close encounters between several such objects within the Oort cloud) some of these object could be deviated and sent into the inner regions of the Solar System - thus forming comets. This is consistent with ...
... dust in the outskirts of our Solar System. Through small orbital perturbations (for instance, close encounters between several such objects within the Oort cloud) some of these object could be deviated and sent into the inner regions of the Solar System - thus forming comets. This is consistent with ...
On the magnetic fields of other planets
... planets suggest that there was a magnetic moment of Venus of the same order as Earth's for about the first billion years of Venus' life. During that time, thermal convection from the heat left over from accretion drove the dynamo. However, after that energy source diminished, there was apparently no ...
... planets suggest that there was a magnetic moment of Venus of the same order as Earth's for about the first billion years of Venus' life. During that time, thermal convection from the heat left over from accretion drove the dynamo. However, after that energy source diminished, there was apparently no ...
Document
... a. sudden outward eruption of electrically charged particles, such as electrons and protons. b. brief outward eruption of atomic particles, such as protons and neutrinos. c. gradual increase in the stream of charged particles that make up the solar wind. d. huge, arched prominence that breaks its ma ...
... a. sudden outward eruption of electrically charged particles, such as electrons and protons. b. brief outward eruption of atomic particles, such as protons and neutrinos. c. gradual increase in the stream of charged particles that make up the solar wind. d. huge, arched prominence that breaks its ma ...
View PDF
... The sun is the central and largest body in the solar system. The sun’s warming of the Earth and tilt of the Earth on its axis have an importan t connection to the seasons. Earth’s motion is the basis for measuring time. Objects in the sky move in regular and predictable patterns around the Sun. The ...
... The sun is the central and largest body in the solar system. The sun’s warming of the Earth and tilt of the Earth on its axis have an importan t connection to the seasons. Earth’s motion is the basis for measuring time. Objects in the sky move in regular and predictable patterns around the Sun. The ...
The solar energetic balance and the dynamics of the radiative zone
... Individual detection is important to see if the modes are influenced by the variability of the tachocline Turck-Chièze et al. ...
... Individual detection is important to see if the modes are influenced by the variability of the tachocline Turck-Chièze et al. ...
Our Sun Produces Bizarre Radiation Bursts—Now NASA Knows Why
... Closer to home, solar flares can also produce gamma rays. Flares happen when active regions on the sun suddenly release explosions of magnetic energy. That accelerates particles to incredibly high speeds and creates intense bursts of light that can briefly outshine the sun itself. (Also see “How Su ...
... Closer to home, solar flares can also produce gamma rays. Flares happen when active regions on the sun suddenly release explosions of magnetic energy. That accelerates particles to incredibly high speeds and creates intense bursts of light that can briefly outshine the sun itself. (Also see “How Su ...
Magnetism and spintransport in the heterostructure of Ferroelectric/ferromagnetic films
... magnetic field generated from current through the spin-torque transfer. These two approaches unfortunately suffer from significant energy dissipation, thus consuming power and producing heat due to the large current required. In this collaborative program, we aim to develop a new generation of magne ...
... magnetic field generated from current through the spin-torque transfer. These two approaches unfortunately suffer from significant energy dissipation, thus consuming power and producing heat due to the large current required. In this collaborative program, we aim to develop a new generation of magne ...
SA1 REVISION WORKSHEET 2
... 8. List the properties of magnetic lines of force. A current through a horizontal power line flows in east to west direction. What is the direction of magnetic field at a point directly below it and at a point directly above it? 9. Draw the patterns of magnetic field lines through and around a curre ...
... 8. List the properties of magnetic lines of force. A current through a horizontal power line flows in east to west direction. What is the direction of magnetic field at a point directly below it and at a point directly above it? 9. Draw the patterns of magnetic field lines through and around a curre ...
Homework, August 29, 2002 AST110-6
... 1. Chapter 6, Problem 6 (20pt). Describe each of the three key processes that led the solar nebula to take the form of a spinning disk. What observational evidence supports this scenario? In our planetary nebula theory for the formation of the solar system, the timing of the solar wind determines wh ...
... 1. Chapter 6, Problem 6 (20pt). Describe each of the three key processes that led the solar nebula to take the form of a spinning disk. What observational evidence supports this scenario? In our planetary nebula theory for the formation of the solar system, the timing of the solar wind determines wh ...
student worksheet with reading
... stayed closer to the sun and lighter elements moved further away. The planets were not formed whole, but were formed as rings of material around the Sun started to clump together into planetesimals through gravitational attraction. This process, known as ‘accretion’, featured a large number of viole ...
... stayed closer to the sun and lighter elements moved further away. The planets were not formed whole, but were formed as rings of material around the Sun started to clump together into planetesimals through gravitational attraction. This process, known as ‘accretion’, featured a large number of viole ...
Lec22_2D
... When the Sun has a lot of sunspots, solar flares, and prominences The Earth is warmed by all the additional energy The Earth is bombarded with cosmic rays, i.e., high energy hydrogen and helium nuclei that are ejected from the Sun. (In other words, a stronger solar wind.) The Earth’s magnetic fi ...
... When the Sun has a lot of sunspots, solar flares, and prominences The Earth is warmed by all the additional energy The Earth is bombarded with cosmic rays, i.e., high energy hydrogen and helium nuclei that are ejected from the Sun. (In other words, a stronger solar wind.) The Earth’s magnetic fi ...
Sunspots Today: A Cheshire Cat
... but the body is missing (no dark markings). We are unsure about past cycles but at present sunspots, with their usual umbrae and penumbrae, are failing to materialize. For hundreds of years the Sun has shown an approximately periodic 11-year alteration in its activity where the number of sunspots in ...
... but the body is missing (no dark markings). We are unsure about past cycles but at present sunspots, with their usual umbrae and penumbrae, are failing to materialize. For hundreds of years the Sun has shown an approximately periodic 11-year alteration in its activity where the number of sunspots in ...
Quiz #5 – The Sun
... Compared to the Earth’s diameter, the sun’s diameter is about 110 times greater. ...
... Compared to the Earth’s diameter, the sun’s diameter is about 110 times greater. ...
Today: Oscilloscope and Faraday’s Law
... Last week we put a voltage on a coil of wire. The resulting current in the coil made it act like a magnet. In other words a current can produce an magnetic field – evidence that electricity and magnetism are connected. Q. Can a magnetic field produce a current? A. Yes… but it is not as easy. A const ...
... Last week we put a voltage on a coil of wire. The resulting current in the coil made it act like a magnet. In other words a current can produce an magnetic field – evidence that electricity and magnetism are connected. Q. Can a magnetic field produce a current? A. Yes… but it is not as easy. A const ...
Geomagnetic storm
A geomagnetic storm is a temporary disturbance of the Earth's magnetosphere caused by a solar wind shock wave and/or cloud of magnetic field that interacts with the Earth's magnetic field. The increase in the solar wind pressure initially compresses the magnetosphere. The solar wind's magnetic field interacts with the Earth’s magnetic field and transfers an increased energy into the magnetosphere. Both interactions cause an increase in plasma movement through the magnetosphere (driven by increased electric fields inside the magnetosphere) and an increase in electric current in the magnetosphere and ionosphere.During the main phase of a geomagnetic storm, electric current in the magnetosphere creates a magnetic force that pushes out the boundary between the magnetosphere and the solar wind. The disturbance in the interplanetary medium that drives the storm may be due to a solar coronal mass ejection (CME) or a high speed stream (co-rotating interaction region or CIR) of the solar wind originating from a region of weak magnetic field on the Sun’s surface. The frequency of geomagnetic storms increases and decreases with the sunspot cycle. CME driven storms are more common during the maximum of the solar cycle, while CIR driven storms are more common during the minimum of the solar cycle.Several space weather phenomena tend to be associated with or are caused by a geomagnetic storm. These include: solar energetic Particle (SEP) events, geomagnetically induced currents (GIC), ionospheric disturbances that cause radio and radar scintillation, disruption of navigation by magnetic compass and auroral displays at much lower latitudes than normal. In 1989, a geomagnetic storm energized ground induced currents that disrupted electric power distribution throughout most of the province of Quebec and caused aurorae as far south as Texas.