... The hotter the gas, the faster they move, and the more energy each of them holds. The free ions and electrons in a plasma behave the same way. Knowing the temperature of the high atmosphere of Earth, or that of the Sun, we can calculate energies expected of ions and electrons found there. However, ions and electrons actually observed in space are often much , much more energetic, and may move at a respectable fraction of the velocity of light (300,000 km/sec or 186,000 miles/sec). ...

... Energy . ... The free ions and electrons in a plasma behave the same way. Knowing the temperature of the high atmosphere of Earth, or that of the Sun, we can calculate energies expected of ions and electrons found there. However, ions and electrons actually observed in space are often much, much more energetic, and may move at a respectable fraction of the velocity of light (300,000 km/sec or 186,000 miles/sec). ... Typical energy of an electron in the polar aurora. 40,000 ev . ... 50,000 ev . ...

What will happen when the fragments hit Jupiter? ... All the fragments will enter Jupiter's atmosphere at an angle of 42 degrees from the vertical and impact near a latitude of 44 degrees south, but on the back side of the planet as seen from Earth (about 10 degrees in longitude behind the edge of Jupiter, as seen from Earth). ... Any body moving through an atmosphere is slowed by atmospheric drag, by having to push the molecules of that atmosphere out of the way. ...

... What's New? Bad Astronomy . ... News . ... Bitesize Astronomy . ... There has been a lot of discussion lately about scientists that have demonstrated faster than light travel (FTL, also called superluminal motion ). ... Nothing has moved faster than light, despite the claims of many people. ... We therefore conclude that nothing with mass can travel at the speed of light, and nothing at all can travel faster. ... Still, nothing can actually travel faster than light. ... 2008 Phil Plait. ...

... Lightning Captured at 7207 Images per Second . ... 23.07.2012 . ... Credit Copyright: Tom A. Warner , ZTResearch , www.weathervideoHD.TV Explanation: How fast is lightning? ... The above lightning stroke did not move too fast, however, for this extremely high time resolution video to resolve. Tracking at an incredible 7,207 frames per second, actual time can be seen progressing at the video bottom. ... July 2012 . ... 2011 2012 . ... NASA Web Site Statements, Warnings, and Disclaimers . ...

... We have measured this "redshift" for the pink black holes, and allowed for it in our calculations. ... We see this effect in the emission from gas around these pink black holes, but it is far too small an effect to account for the pinkness. Thus the swirling motions of gas around or into the black holes cannot produc the colour. ... At first we thought that these things were normal blue black holes hidden behind clouds of interstellar dust, that absorbed the blue light and made them appear pink. ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2012 July 23 . Lightning Captured at 7,207 Images per Second . ... Explanation: How fast is lightning? Lightning , in fact, moves not only too fast for humans to see, but so fast that humans can't even tell which direction it is moving. ... Follow APOD on: Facebook ( Daily ) ( Sky ) ( Spanish ) or Google Plus ( Daily ) ( River ) . ...

... Before the modern era of technological astronomy, to know anything about the Universe beyond our planet we relied on light. ... Historically the two rival ideas were that light was either a stream of tiny bullet-like particles or a wave wobbling its way through space. ... The light we see (visible light which is not the tautology it sounds) is only part of the electromagnetic spectrum, a great sweep of radiations which also includes radio, infra-red, ultra-violet, x-rays and gamma rays. ...

are denoted by the following symbols and may be taken to have the values below Elementary charge Speed of light in vacuum Planck constant Permeability of vacuum Permittivity of vacuum Unified atomic mass constant Rest mass of proton Rest mass of electron Boltzmann constant Avogadro constant Gravitational ... Write down the expression for the gravitational field, g, at distance r from a point mass of mass m, carefully defining all the terms in your expression. ...

Here is some data: X Y Time 10 10 1 second 12 15 2 seconds 8 18 3 seconds 10 20 4 seconds 10 25 5 seconds 15 26 6 seconds 17 32 7 seconds 15 15 8 seconds 10 12 9 seconds 10 5 10 seconds . ... You drop a ball from a height of 20 meters. ... Power is defined as the rate at which energy is used or Energy/time; Show that Power can be expressed as force x velocity. ... What is the potential energy in a 10 kg mass suspended at a height of 100 meters above the surface of the earth? ...

. Nuclear fuel glows blue in a submerged reactor core. The light, called Cerenkov radiation, arises from high-energy electrons that are moving faster than light can travel through the water. Similarly, IceCube detects flashes of Cerenkov light when neutrinos interact within the detector and produce charged particles that move through the ice faster than light does. Argonne National Laboratory

The classic solution for homogeneous sphere was suggested in 1899 by A.E.N. Love [ 330 ], in 1908 by G. Mie [ 342 ] and in 1909 by P. Debye [ 199 ]. ... Traditionally the theory of light scattering by a sphere is called the Mie theory. ... The exact solutions of the Mie problem for an optically active sphere (i.e. a sphere of optically active material [ 7 ]) and for a sphere with an optically active mantle were first obtained in 1974-5 by S. Bohren [ 158 , 159 ]. ...

Bigbang Forum Message . ... String Cosmology Questions For Bruce . ... Posted by Richard Ruquist on November 11, 2005 01:51:22 UTC . ... Two spacetimes cosmology - yanniru - November 20, 2005 - 20:59 UTC . ... Can't be much help.... - bruce - November 21, 2005 - 05:06 UTC . ... Thanks.. - bruce - November 21, 2005 - 23:28 UTC . ... www.astronomy.net . ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

Daily Nightly" by Mike Nesmith Dark and rolling figures move Through prisms of no color. Hand in hand they walk the night But never know each other. Passion passed in neon lights Light up the jewelled traveler, Lost in scenes of smoke-filled dreams Find questions but no answer. ... Once again, such anxious men Find questions but no answers. ... Transcribed by bias1863@jade.saintmarys.edu [Does anyone know the questioned lyrics? ... We'd like to know!] ...

... Check here for the latest news related to my research. Paper on the Discovery of ROXS 42Bb, a planetary mass companion 10.01.2013 I am co-author of a new paper accepted to ApJ Letters on the discovery of a co-moving companion to a tight, low mass binary in a star forming region. ... Paper on Fomalhaut Accepted to ApJ Letters 9.03.2013 I am co-author of a new paper submitted to ApJ Letters on re-analyzing deep archival Keck/NIRC2 data for additional companions to Fomalhaut. ...

... 2014 Irkutsk-Listvyanka, Russia G r o u p language English Theoretical round General note. ... Footstep of babr. ... Draw in real scale a picture of image of the sunspot "footstep of babr" (see picture and condition of the previous problem) obtained in the focal plane of the LSVT. ... Orion's Belt. ... Estimate at what distance from the Babr the Penguin was, if the shining of the "fourth star of Orion's Belt" approximately corresponds to that of the three others in the picture. ... ISS near Zenith. ...

... Over the first 4 years, its X-ray telescopes eROSITA and ART-XC will survey the whole sky with a record sensitivity in the 0.5-10 keV energy band. ... The goal of the second international Spectrum-RG conference is to discuss the different scientific topics addressed by the mission, synergies with surveys at other wavelengths, and requirements to follow-up observations.Contributed talks and poster presentations are invited on the topics related to the SRG science goals. ... Active galactic nuclei . ...

... The solar wind - a few million tonnes of charged particles that leave the Sun every second - is continuously flowing past our planet at huge speeds (equivalent to travelling from London to New York in 5-15 seconds). ... Strangely enough, the fastest and most steady streams of solar wind originate from coronal holes. ... How such a large amount of matter escapes the Sun's huge gravity and reaches such high speeds (in the quietest solar regions!) is not yet known. ... View Slides . ...

... Some wonder if smaller wheels have less inertia and therefore give greater acceleration, while others believe that the smaller wheel has to spin faster, so it is a wash. ... The kinetic energy in the wheel is a measure of how much energy you've spent just getting the wheel to spin rather than investing that energy into the road. ... Larger wheels have less rolling resistance, for several reasons. ... So how much difference does the lower inertia of smaller wheels really make? ...

... A typical turret scan will drive the dome from -5 arc minutes to +5 arc minutes in two minutes at constant velocity. ... If the beam is 3 arc minutes (lband) and the dome has been offset by 5 arc minutes, then the turret will perform 120sec/15sec=8 cycles of the sine wave during the two minutes. There are 10/3=3.3 beams in the 10 arc minutes so the turret will cut through the source (0 turret offset) 8*2/3.3 = 5 times (*2 since a complete cycle cuts through the 0 position twice). ... Amin #beams . ...