Circling around magnetic field lines. ... The ring current . Because positive ions and negative electrons drift in opposite directions (see drawing), that motion will create an electric current that circulates clockwise around the Earth when viewed from north. ... How then can the radiation belt and ring current arise? ... Electric fields are able to push trapped particles earthward, and unlike the purely magnetic motion described earlier, an electric field can also energize them. ...

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• Principles of the Magnetic Trapping of Particles
• Trapped Radiation -- History
• Lagrangian Points

... Field Lines . ... Charged particles--ions and electrons--can be trapped by the Earth's magnetic field. ... A fast rotation (or "gyration") around magnetic field lines, typically thousands of times each second. ... A slow drift around the magnetic axis of the Earth, from the current field line to its neighbor, staying roughly at the same distance from the exis. ... Electrons and ions, of the energies commonly encountered in the magnetosphere, tend to circle around magnetic field lines. ...

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• The Sun
• Radiation Belts
• The Solar Wind

What happens to a star heavier than five solar masses? ... Stars about ten solar masses probably behave like our five solar mass star until they reach the end of core-helium burning. ... The Crab nebula was formed after a massive explosion ripped a star apart in 1054. ... Today, the glowing outer layers of the star are still rushing away from a tiny star in the centre. ... An incredible explosion rips through the outer layers of the star, releasing colossal amounts of energy in a supernova explosion. ...

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• Strong Gravity in the Vicinity of Supermassive Black Holes - by Eamon Scullion,
• Armagh Observatory

With this knowledge of orbits, we are ready to plan a trip to Mars. ... The spacecraft will already have the 107,000 kilometers per hour (66,500 miles per hour) speed of Earth, whereas Mars moves at only 86,900 kilometers per hour (53,900 miles per hour). ... A speed of about 42,000 kilometers per hour will be enough to escape the Earth's gravity and, when added to the Earth's orbital speed around the Sun, put the spacecraft on a Hohmann transfer orbit to the Red Planet. ... 1,570,000 . ... Earth . ...

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• ASP: To Every Season There is a Reason
• ASP: This Restless Globe
• ASP: Light Pollution

The radiation belts around the planets are the interrnal regions of planets' magnetospheres where the own magnetic field of a planet keeps the charged particles (protons and electrons) having the great kinetic energy. ... They usually distinguish the Earth's internal and external radiation belts. the internal radiation belt of the Earth has the maximum particles density (mainly protones) over the equator in the height of 22 thousand km. ... Jupiter and Saturn have the powerful radiation belts. ...

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• Keplere
• yeare

... The Smooth Spheres of Gravity Probe B . ... 28.04.2004 . ... Credit: Gravity Probe B Team, Stanford , NASA Explanation: Does gravity have a magnetic counterpart? ... In a bold attempt to directly measure gravitomagnetism , NASA launched last week the smoothest spheres ever manufactured into space to see how they spin. ... Better understanding space, time, and gravity can have untold long term benefits as well as likely shorter term benefits such as better clocks and global positioning trackers. ...

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• Астронет > The Smooth Spheres of Gravity Probe B
• XWare > APOD

... 2004 April 28 . The Smooth Spheres of Gravity Probe B . Credit: Gravity Probe B Team, Stanford , NASA . ... In a bold attempt to directly measure gravitomagnetism , NASA launched last week the smoothest spheres ever manufactured into space to see how they spin. ... Better understanding space, time, and gravity can have untold long term benefits as well as likely shorter term benefits such as better clocks and global positioning trackers. ... About APOD | ... NASA Official: Jay Norris. ...

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• Medium
• APOD: December 23, 1998 - Ring Around the Galaxy
• APOD: January 4, 1999 - Ring Around the Cluster

Еще в разделе: (Показать все результаты (>4) - aberrator.astronomy.net/ )

... higher temperatures -- faster motion -- higher energy particles -- break into nucleus . ... Spectral type depends on the stellar mass: high mass stars are profiligate with their fuel supply, and have brief, but spectacular, careers; M dwarfs live forever. Stellar lifetimes range from several million years for stars with 100 solar masses . ... These `failed stars' are known as 'brown dwarfs'. ... a brown dwarf of 0.01 M(sun) (10 Jupiter masses) takes only 10 7 years to reach the same limit. ...

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• Dust Around Stars
• Dust disk around a black hole in galaxy NGC 7052
• Black holes in galactic nuclei

... 8, ``Celestial Mechanics'', 2002 Generalized Nordtvedt effect and tests of equivalence principle for rotating bodies Yu. ... To study theoretical predictions for possible violation of EEP the Thirring­Feynman field gravity theory (FGT) is considered [3], [4]. ... Using Lagrangian formalism of the relativistic field theory the post­Newtonian equation of translational motion for rotating bodies is derived in the frame of FGT. ... Thirring W. Field--theoretical approach to gravitation. ...

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• http://www.ipa.nw.ru/conference/2002/sovet/PS/IVASHKIN.PS
• http://www.ipa.nw.ru/conference/2002/sovet/PS/KOUPRIAN.PS
• http://www.ipa.nw.ru/conference/2002/sovet/PS/FOMINOV.PS

... More on 51 Peg: . The discovery of a Jupiter--mass planet in orbit around the solar--type star 51Peg has been reported by Michel Mayor and Didier Queloz (Geneva Observatory) on October 6th at the 9th Cambridge workshop on "cool stars, stellar systems, and the sun" held at Florence (Italy). ... Recall that the measurements of radial velocity only yield v sin i which in turn gives us M sin i. For most values of i, sin i will be greater than 0.5 and this gives a mass estimate of 0.5 Jupiter masses. ...

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• Energy From the Wind
• Astronomy HyperText Book: Stellar Evolution
• Climatology; Ice Ages

... Bad Astronomy . ... Every few months, one of a series of questions comes up on the USENET group sci.astro involving tides, or the rotation of the Moon, or the recession of the Moon from the Earth. ... Why the Moon's rotation period is the same as the length of time it takes to orbit the Earth (same as number 1, but phrased differently). ... But when this happens, the time it takes for the Earth to rotate once will be slowed to exactly the same time it takes for the Moon to go around the Earth once! ...

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• Phil Plait's Bad Astronomy: Bitesize Astronomy
• Phil Plait's Bad Astronomy: Bad News
• Phil Plait's Bad Astronomy: Misconceptions: James McCanney's Nonsense

... Subject of Astronomy. ... Basis of Spherical and Practical Astronomy. ... Celestial Sphere. ... Changes of Star's Coordinates as a Result of Daily Rotation of Celestial Sphere. ... Time Measuring. ... Changes of Solar Equatorial Coordinates. ... Stellar Day, Stellar Time. ... Real Solar Time. ... Mean Solar Time. ... Connections between Stellar and Mean Time. ... Apparent Path and Configuration of Planets. ... Ways of Energy Transportation to Stellar Surface.Basis of Spectral Analysis. ... Solar...

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• Introduction to Astronomy
• Celestial Mechanics
• Internal Structure of Stars

... Fig.1 shows an image between RA 4hrs and 8 hrs reduced using new data reduction algorithms implemented by Mark Calabretta. ... An Ordered Magnetic Field in the Large Magellanic Cloud Magnetic fields are hard to study in detail in the Galaxy because of projection effects and distance uncertainties. ... 2005; Science, 307, 1610) were able to detect a coherent magnetic field in the LMC using the radio continuum data gathered as part of the HI survey of Kim et al. ... LVHIS is alive and well! ...

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• http://www.atnf.csiro.au/research/cena/documents/presentations/bray.pdf
• Diffuse gas in and around the Milky Way - Programme
• Research - Compact high-velocity clouds around the Milky Way

... Gravity is responsible for keeping your feet on the ground and keeping the Earth and all other planets in our Solar System in their orbits around the Sun. ... Einstein's theory of gravity, known as the theory of General Relativity. This suggested that gravity is actually the curving of the fabric of the Universe, known as 'spacetime', around objects. For instance, a very heavy star warps the space around it, causing a deep well in the fabric, and pulling in anything that comes too close. ...

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• SPHERE Reveals Spiral Disc Around Nearby Star
• SPHERE images the dust ring around the star HR 4796A
• Aurora around one of the Earth's poles | ESO

... How much brighter is the Sun as viewed from the planet Mercury as compared to Earth ? ... Actually, all of these questions can be answered through a very simple mathematical relationship known as the inverse square law. ... As the distance from the Sun increases the surface area of the sphere grows by the square of the distance. ... Common sense tells us that the Sun will be brighter and the inverse square law tells us how much brighter. ... gr = 0.912 G or 91.2% gravity felt at Earth's surface. ...

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• The Planet Jupiter
• Terms and Definitions
• High-resolution Herschel spectroscopy reveals the proto-planetary disk around

HI envelopes around the Supernova remnants . ... From 24 investigated Supernova remnants 12 the HI envelopes with radial motions are found. The example of an envelope around the Supernovae remnant W28 is shown on figure 1. Mean velosity of radial motion is 12.9 km/s, thickness of envelopes is 0.3 of radius, mean HI mass is 5.6E+4 mass of the Sun, mean kinetic energy is 10 50 ergs. ... Distribution of HI emission around the Supernovae remnant W28. The details shows an extending envelope. ...

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• Results scientific researchs 8
• Fabry-Perot Interferometer: Gallery Old
• Spectral energy distribution

... The force F of gravity between two objects of mass m and M, whose centres are a distance r apart, is given by Newton's famous equation: [pic], where G = 6.67(10-11 N m2 kg-2, and F is measured in Newtons. So, the force in orbit Fo is weaker than the force on the Earth's surface F0 by the ratio: [pic] where the radius of the Earth is 6,400 km, and the orbit is 1000 km above the Earth's surface. ... Energy Considerations Another way to see all this is to consider the energy of an object in orbit. ...

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• http://www.mso.anu.edu.au/pfrancis/roleplay/MysteryPlanet/Answers_23.doc
• http://www.mso.anu.edu.au/pfrancis/phys1101/Lectures/L06/Lecture06.pdf
• http://www.mso.anu.edu.au/pfrancis/roleplay/MysteryPlanet/Orbits.PDF

... A rough estimation is that in the United States there is one planetarium per 100,000 population, ranging in size from the Hayden Planetarium's 20-meter dome seating 430 people, to three-meter inflatable portable domes where children sit on the floor. ... Together dblo associates make a huge impact in the architecture, interior design and development arena in London. ... With the holidays around the corner what better way to spoil your family than with your very own private home cinema. ...

20. Seminars