Astronomy/Experts

ExpertAverage RatingsExpertise

Paul Wagner

Available
Astronomy and telescope making. Have made at least seven telescopes, both refractors and reflectors, and have spent 30 years looking at the nighttime sky.

Philip Stahl

U.S.
Available
I have more than forty years of experience in Astronomy, specifically solar and space physics. My specialties include the physics of solar flares, sunspots, including their effects on Earth and statistics pertaining to sunspot morphology and flare geo-effectiveness.

Harry Hayfield

U.K.
Available
Particular expert in eclipses (both solar and lunar), but able to answer most questions about astronomy or refer to a website that can help

Patrick Weiler

U.S.
Available
I`d be pleased to answer questions about any aspect of astronomy, particularly those related to cosmology, astrophysics, and planetary sciences. I can also provide reliable information on unique topics like dark energy, dark matter, black holes, etc.,.

Courtney Seligman

U.S.
Available
I can answer almost any question about astronomy and related sciences, such as physics and geology. I will not answer questions about astrology and similar pseudo-scientific rubbish.

Recent Answers

2014-07-22 Cameras:

It's true that the main thing that keeps us from seeing stars in the city is simply all the lighting. Back when the Northridge quake occurred (that's probably the one you heard about), the police received

2014-07-06 nicks reply to question:

Hello Again, Nick,     Having just watched the Youtube video, I come away with the conclusion the whole thing is poppycock and scifi fantasy. There is NO way anyone would remotely survive any 'near approach'

2014-06-26 How Many Multiverses Are There? Space Sizes Shapes Quality Quantity Eternity Infinity Hera Milky Way Galaxy Andromeda Serpents Part Of? Names Multiverses Galaxies:

Hello,    As far as we know, there are no Multiverses! The concept so far is entirely a speculative one for which there is no evidence.    Until some manner of hard evidence, or even observational evidence

2014-06-21 stars:

Both answers usually depend upon Kepler's Third Law of planetary motion (see http://cseligman.com/text/history/kepler3.htm ), which relates the motions of objects in a system to its mass. Specifically

2014-06-13 Lunar cycle and date:

Hi Garry,    There have been lots of articles online talking about how rare it is, but it really isn't any rare than most dates. Having a Full Moon on Friday the 13th is no more rare than occurring on

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