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Astrophysics/Questions

SubjectDate AskedExpert
Curves & Dimensions5/15/2012James Gort
Solar day5/9/2012Steve Nelson
light in vacuum5/8/2012Steve Nelson
light in vacuum5/7/2012Steve Nelson
Eqn. of transfer and moments4/25/2012Philip A. Stahl
Solar constants4/19/2012Philip A. Stahl
dark energy4/14/2012Philip A. Stahl
Earth's orbit and rotation3/28/2012Philip A. Stahl
Dark energy3/26/2012Philip A. Stahl
Expansion of the universe3/9/2012Philip A. Stahl
Hawking radiation2/28/2012Steve Nelson
Hawking radiation2/26/2012Steve Nelson
speed of light2/9/2012Steve Nelson
Astonomy / Physics1/31/2012Philip A. Stahl
Astonomy / Physics1/31/2012Philip A. Stahl
Time dilation and expansion of the universe1/27/2012Philip A. Stahl
Ric Ross questioin -infinite gravitational force1/12/2012Philip A. Stahl
Auroral magnetic bottle problem1/4/2012Philip A. Stahl
Plasma orbit theory & magnetosphere1/2/2012Philip A. Stahl
Black Hole - Holographic Principle12/23/2011James Gort
comets and Jupiter12/20/2011James Gort
comets and Jupiter12/19/2011James Gort
Expanding universe12/9/2011James Gort
deep-space exploration12/7/2011Steve Nelson
deep-space exploration12/6/2011Steve Nelson
venus12/5/2011James Gort
orbital bodies12/4/2011Steve Nelson
physics12/3/2011James Gort
black holes11/28/2011Steve Nelson
microgravity11/26/2011Steve Nelson
matter/dark matter ratio11/23/2011Steve Nelson
Maxwell and the Speed of LIght11/4/2011Philip A. Stahl
Maxwell and the Speed of LIght11/4/2011Philip A. Stahl
Gliese 58110/30/2011James Gort
Expansion of the universe trough diffusion10/20/2011Philip A. Stahl
Polar Lights9/30/2011Steve Nelson
electromagnetic waves9/30/2011Philip A. Stahl
Ref: question9/11/2011Philip A. Stahl
titans9/10/2011Philip A. Stahl
speed of light9/6/2011James Gort
waves9/6/2011Steve Nelson
Cosmological Expansion or Transition?8/19/2011James Gort
scientific notation8/17/2011James Gort
light6/21/2011Philip A. Stahl
light6/20/2011Philip A. Stahl
light6/20/2011Philip A. Stahl
Dark energy6/13/2011Philip A. Stahl
universe5/27/2011Philip A. Stahl
Two fluid theory5/18/2011Philip A. Stahl
Alien spacecraft5/17/2011Steve Nelson
Astronomy5/4/2011James Gort
average mass per particle4/12/2011Steve Nelson
density terminology4/11/2011Steve Nelson
density terminology4/11/2011Steve Nelson
astrophysics4/9/2011Philip A. Stahl
aurora3/29/2011Philip A. Stahl
tachyons & photons3/13/2011Philip A. Stahl
How to solve complex problems2/20/2011Philip A. Stahl
Beloved In Christ2/19/2011Steve Nelson
is the solar system merely an atom in a much larger structure?2/6/2011Philip A. Stahl
angular momentum of a black hole1/31/2011Philip A. Stahl
Quark-Gluon Plasma1/31/2011Steve Nelson
Expanding Universe1/25/2011Philip A. Stahl
Gravity - Thought Experiement1/19/2011Philip A. Stahl
Gravity - Thought Experiement1/18/2011Philip A. Stahl
hadron collider1/11/2011James Gort
Gravity wave experiment12/13/2010Steve Nelson
Illuminance in outer space12/7/2010Steve Nelson
Energy Released by Stars11/29/2010Steve Nelson
The Speed of a Gamma-ray Burst11/20/2010Steve Nelson
Big bang11/5/2010Steve Nelson
E cross B flow9/28/2010Philip A. Stahl
E cross B flow9/28/2010Philip A. Stahl
Dynamo Flare models9/22/2010Philip A. Stahl
The big bang9/18/2010Steve Nelson
dark energy, rate of expansion9/5/2010Steve Nelson
speed of light9/4/2010James Gort
Just a physics question8/29/2010Steve Nelson
a living universe?8/27/2010Philip A. Stahl
Shape of the Universe8/26/2010Steve Nelson
Light8/3/2010Steve Nelson
Proper symbol for Entropy?7/29/2010Steve Nelson
Help with planet accelaration7/28/2010Philip A. Stahl
Help with planet accelaration7/25/2010Philip A. Stahl
Physics7/25/2010Steve Nelson
confused7/24/2010Steve Nelson
confused7/24/2010Steve Nelson
Topology of the Universe7/24/2010Philip A. Stahl
Topology of the Universe7/20/2010Philip A. Stahl
Confused...7/18/2010Steve Nelson
light speed7/10/2010Steve Nelson
light speed7/10/2010Philip A. Stahl
Laser Nuclear fusion7/9/2010Steve Nelson
is time can stand on its own?7/9/2010Steve Nelson
My theory of7/1/2010Philip A. Stahl
My theory of "the big bang and the cycle of the universe"7/1/2010Philip A. Stahl
cosmic rays6/13/2010Philip A. Stahl
gas follow up question6/12/2010Steve Nelson
gas follow up question5/31/2010Steve Nelson
gas follow up question5/25/2010Steve Nelson
gas5/24/2010Steve Nelson
20125/2/2010Steve Nelson
"confused?"4/23/2010Steve Nelson
Matter4/12/2010James Gort
Big Bang Theory4/10/2010James Gort
Matter creation4/2/2010Philip A. Stahl
entropy and the accelerating expansion4/2/2010James Gort
"Confused?"3/27/2010Steve Nelson
Doppler shift vs. expansion3/27/2010Steve Nelson
Effect on Magnetosphere of Field Reversal3/22/2010Philip A. Stahl
E3/9/2010Philip A. Stahl
Origin of elements heavier than iron2/22/2010Steve Nelson
Origin of elements heavier than iron2/21/2010Steve Nelson
electron beam in space2/21/2010Philip A. Stahl
Stromgren sphere problem2/18/2010Philip A. Stahl
gravitational force nature2/17/2010Steve Nelson
Time1/16/2010Philip A. Stahl
collision1/15/2010Steve Nelson
Using expansion to find the age of the universe1/11/2010Philip A. Stahl
LIMIT OF SPACE12/5/2009Steve Nelson
Follow-up solution11/5/2009Philip A. Stahl
Binary star problem11/3/2009Philip A. Stahl
Relative and Absolute Time11/3/2009Philip A. Stahl
astrophysics/ black hole theory10/31/2009Philip A. Stahl
Electragnetic fields10/23/2009Steve Nelson
Tokamak10/21/2009Steve Nelson
Science Fair10/6/2009Steve Nelson
eddington limit9/5/2009Steve Nelson
cmbr8/6/2009Philip A. Stahl
boundry of universe8/4/2009Philip A. Stahl
Gravity, escape velocity7/21/2009Steve Nelson
Gravity, escape velocity7/21/2009Steve Nelson
solar flares7/19/2009Steve Nelson
Einstein7/19/2009Steve Nelson
The supposed "Alignment" of 20127/1/2009Steve Nelson
Big Bang6/16/2009Steve Nelson
measure of movement in space6/10/2009Steve Nelson
dark matter6/9/2009Steve Nelson
Escape velocity5/25/2009Philip A. Stahl
Escape velocity5/24/2009Philip A. Stahl
Cat's Eye Nebula5/22/2009Steve Nelson
Optics5/19/2009Steve Nelson
Atom formation5/13/2009Philip A. Stahl
Atom formation5/13/2009Steve Nelson
Solar plasma instabilities5/10/2009Philip A. Stahl
Nanotechnology5/9/2009Steve Nelson
The first second of the big bang5/6/2009Steve Nelson
Nanotechnology5/5/2009Steve Nelson
astrophysics4/29/2009Steve Nelson
astrophysics4/29/2009Steve Nelson
A HYPOTHETICAL QUESTION4/28/2009Steve Nelson
Energy in physics4/23/2009Steve Nelson
relativity4/19/2009Steve Nelson
relativity4/17/2009Steve Nelson
special relativity4/16/2009Steve Nelson
Hall term-Hall MHD4/6/2009Philip A. Stahl
Relativity4/2/2009Steve Nelson
Theory of relativity4/2/2009Philip A. Stahl
Theory of relativity3/31/2009Philip A. Stahl
Theory of relativity3/30/2009Philip A. Stahl
Number of galaxies3/23/2009Philip A. Stahl
work3/19/2009Steve Nelson
expanding universe3/18/2009Philip A. Stahl
expanding universe3/18/2009Philip A. Stahl
Solar System Model3/18/2009Steve Nelson
about the relation between plannets and stars3/10/2009Steve Nelson
How are neutrinos detectected if they are ghost?3/9/2009Steve Nelson
expanding universe3/8/2009Philip A. Stahl
Hall current in solar flares3/6/2009Philip A. Stahl
Supermassive black holes3/6/2009Philip A. Stahl
Proton-Proton Solar Fusion3/6/2009Philip A. Stahl
Speed of light relative3/5/2009Philip A. Stahl
The powers of a black hole3/4/2009Philip A. Stahl
production of energy in stars3/3/2009Philip A. Stahl
Flare time scales2/26/2009Philip A. Stahl
Big band and Space-time2/18/2009Steve Nelson
Earth flares2/15/2009Philip A. Stahl
SID flares2/14/2009Philip A. Stahl
Earth flares2/13/2009Philip A. Stahl
looking 14 billion years towards the big bang2/10/2009Steve Nelson
velocity, centripetal acceleration, gravitational acceleration2/1/2009Philip A. Stahl
Earth flares1/26/2009Philip A. Stahl
LHC Probing the Improbable1/22/2009James Gort
infinity1/22/2009Philip A. Stahl
extrasolar spectrum1/20/2009James Gort
Surface temperature in gray atmosphere1/7/2009Philip A. Stahl
right ascension and declination1/4/2009James Gort
Polytropic gas spheres12/30/2008Philip A. Stahl
(Extremely) Theoretical Physics12/19/2008Steve Nelson
pop-science12/8/2008Philip A. Stahl
Speed of cosmic rays12/8/2008Philip A. Stahl
Advance of perihelion in relativity12/6/2008Philip A. Stahl
space travel12/2/2008Philip A. Stahl
Regarding Iron12/2/2008Steve Nelson
Infinity12/1/2008Steve Nelson
Relativity11/23/2008Steve Nelson
light11/21/2008Steve Nelson
why sky is dark at night ?11/17/2008Philip A. Stahl
please help me10/28/2008Steve Nelson
Big tube from earth...10/20/2008Philip A. Stahl
Hawking's Concession9/26/2008Steve Nelson
MS9/25/2008Steve Nelson
Gravitational pull9/17/2008Philip A. Stahl
plasma9/6/2008Philip A. Stahl
more info9/5/2008Philip A. Stahl
more info9/4/2008Philip A. Stahl
Logical Answer9/4/2008Philip A. Stahl
Logical Answer9/4/2008Steve Nelson
photon energy of a blackbody spectrum8/27/2008Steve Nelson
Modern physics8/21/2008Philip A. Stahl
speed of light7/31/2008Steve Nelson
speed of light7/31/2008Philip A. Stahl
magnetic poles7/16/2008Steve Nelson
termo7/10/2008Steve Nelson
White holes -- my favorite astronomical object7/3/2008Steve Nelson
White holes -- my favorite astronomical object7/3/2008Philip A. Stahl
White holes -- my favorite astronomical object7/2/2008Philip A. Stahl
White holes -- my favorite astronomical object7/2/2008Steve Nelson
egg drop w/ restrictions6/20/2008Steve Nelson
Gravity, escape velocity6/5/2008Steve Nelson
Gravity, escape velocity6/4/2008Steve Nelson
Binary star problem6/4/2008Philip A. Stahl
"escape velocity"6/3/2008Steve Nelson
Gravity5/13/2008Steve Nelson
Gravity5/13/2008Steve Nelson
Why sky is dark?5/2/2008James Gort
Fermi acceleration4/22/2008Philip A. Stahl
Fermi acceleration4/22/2008James Gort
the sun4/17/2008Steve Nelson
Double layers3/19/2008Philip A. Stahl
inductance and solar flares3/13/2008Philip A. Stahl
Transfer equation for brightness temperature3/10/2008Philip A. Stahl
Normalized Stokes parameters and coherency matrix2/28/2008Philip A. Stahl
Normalized Stokes parameters and coherency matrix2/27/2008Philip A. Stahl
radial & transverse star velocities2/23/2008Philip A. Stahl
Received spectral power2/20/2008Philip A. Stahl
Equation of motion in a force-field2/17/2008Philip A. Stahl
Magnetic field problem2/15/2008Philip A. Stahl
Ordiinary and extraordinary waves2/13/2008Philip A. Stahl
Gravitational Shift in Multi-Star Systems2/12/2008Philip A. Stahl
cut-off frequency v. resonant frequency2/11/2008Philip A. Stahl
time dilation at relitvistic speeds (badly spelt)2/9/2008Steve Nelson
galactic movement2/9/2008Steve Nelson
jupiter's mass2/7/2008Steve Nelson
Number of atoms1/31/2008Philip A. Stahl
Number of atoms1/30/2008Philip A. Stahl
Star supernova1/28/2008Steve Nelson
Possible Earth re-entry1/18/2008Steve Nelson
Plasma problem1/18/2008Philip A. Stahl
atomics particles1/16/2008Steve Nelson
Vacuum in Space1/4/2008Steve Nelson
Planet X12/30/2007Steve Nelson
Research12/26/2007Philip A. Stahl
Research12/24/2007Philip A. Stahl
Comet Holmes12/20/2007Steve Nelson
Jupiter11/27/2007Philip A. Stahl
Astrophysics Career11/25/2007Philip A. Stahl
Astrophysics Career11/24/2007Philip A. Stahl
Velocity of EMR !11/22/2007Philip A. Stahl
Loss cone instability and flares11/19/2007Philip A. Stahl
global warming11/18/2007Philip A. Stahl
Deviation of emr under infulence of gravity11/18/2007Philip A. Stahl
Mass of Photon is not equal to ZERO !11/18/2007Philip A. Stahl
big bang11/14/2007Philip A. Stahl
Stars and Elements in the Universe11/10/2007Philip A. Stahl
Galactic Alignment11/1/2007Philip A. Stahl
Galactic Alignment11/1/2007Philip A. Stahl
The big rip?10/16/2007Philip A. Stahl
life10/10/2007Philip A. Stahl
Mean molecular weights of stellar gases10/8/2007Philip A. Stahl
gravitation9/14/2007James Gort
Colapsing Universe9/13/2007James Gort
forces of nature8/10/2007Philip A. Stahl
Gravity in space8/9/2007Philip A. Stahl
a career in research in the field of astrophysics8/8/2007Philip A. Stahl
planets5/29/2007James Gort
planet x5/29/2007James Gort
Speed of light5/27/2007James Gort
Light5/22/2007James Gort
Brier P-Score for Flare Prediction5/16/2007Philip A. Stahl
accretion disk around a black hole binary5/8/2007James Gort
brightness temperature of a supernovae remnant5/8/2007Philip A. Stahl
Vector Mechanics5/7/2007James Gort
Magnetic helicity5/5/2007Philip A. Stahl
Speed of Light - Special Relativity Postulate4/27/2007James Gort
Wind due to acceleration of earth?4/25/2007James Gort
Eddington Limit4/16/2007James Gort
Virial Theorem & Total stellar energy4/9/2007Philip A. Stahl
Static corona?4/6/2007Philip A. Stahl
Problem4/5/2007Philip A. Stahl
Plasma mirror problem4/4/2007Philip A. Stahl
Two stream instability4/3/2007Philip A. Stahl
gravity4/1/2007Philip A. Stahl
Geometery/dimensions/matter displacement2/28/2007James Gort
space time2/27/2007James Gort
Alfven waves2/10/2007Philip A. Stahl
MOVE1/26/2007James Gort
Anti_matter1/15/2007James Gort
Stopping_light1/15/2007James Gort
seeking a mathamatical concept...1/8/2007James Gort
Magnetic Reynolds number12/26/2006Philip A. Stahl
Universe.12/19/2006James Gort
Maxwell equations applied to solar fields12/17/2006Philip A. Stahl
Big Bang theory12/3/2006Philip A. Stahl
Astrophysics problems11/28/2006Philip A. Stahl
Gray atmosphere and distance modulus11/21/2006Philip A. Stahl
hydrogen absorption lines11/15/2006Philip A. Stahl

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Astrophysics

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Philip A. Stahl

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Expertise

I specialize in stellar and solar astrophysics. Can answer any questions pertaining to these areas, the spectroscopic analysis of stars – as well as the magneto-hydrodynamics of sunspots and solar flares. Sorry – No homework problems done or research projects! I will provide hints on solutions.

Experience

Have published papers on the relationship between sunspot morphology and solar flares; discovery of SID flares related to this, constructed computerized stellar models; MHD research.

Organizations
American Astronomical Society (Solar physics and Dynamical astronomy divisions), American Geophysical Union, American Mathematical Society, Intertel.

Publications
Solar Physics, Journal of the Royal Astronomical Society of Canada, Journal of the Barbados Astronomical Society, Meudon Solar Flare Proceedings (Meudon, France). Books: 'Selected Analyses in Solar Flare Plasma Dynamics', 'Physics Notes for Advanced Level'.

Education/Credentials
B.A. degree in Astronomy; M.Phil. degree in Physics - specializing in solar physics.

Awards and Honors
Postgraduate research award- Barbados government; Studentship Award in Solar Physics - American Astronomical Society

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