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Tom Whiting

Astronomy has been my hobby/pasttime for over 50 years.  Currently own 3 telescopes, the largest of which is a 30 inch Newtonian truss Dob that is portable.I taught Astronomy/Meteorology at the University Level for 13 years before retiring in 1995. Being retired and home most of the time, I am able to answer all questions relatively quickly, unless it's a new moon weekend with good observing conditions.  No astrology questions please, or questions about alleged UFO picture identifications.

Patrick Weiler

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.,.

Philip Stahl

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 as applied to astronomical investigations.

Brad Tucker

I'm happy to answer any general questions about Astronomy, Astrophysics, and Cosmology. I'm also happy to take general, specific, and detailed questions related to supernovae, Baryonic Acoustic Oscillations, the Cosmic Microwave Background, dark matter, dark energy, and the Big Bang Theory. I'm also happy to chat about Astronomy/Astrophysics education and careers, and philosophy and science.

Harry Hayfield

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

James Gort

Questions on observational astronomy, optics, and astrophysics. Specializing in the evolution of stars, variable stars, supernovae, neuton stars/pulsars, black holes, quasars, and cosmology.

Courtney Seligman

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.

Paul Wagner

On Vacation
returns 04/26/2014
Astronomy and telescope making. Have made at least seven telescopes, both refractors and reflectors, and have spent 30 years looking at the nighttime sky.

Recent Answers

2014-04-20 Getting a grip on gravity!:

Gravity just pulls everything downward, regardless of its mass or density (the mass per unit volume). But when the Earth was relatively young, it was probably either entirely liquid ("molten"), or mostly

2014-04-18 planet core temps:

There is no evidence that the actual temperatures have increased at any time in recent history. What has happened is that gravitational studies have indicated that the surfaces of Mars and Mercury are

2014-04-11 Solar system to scale:

Hi James,    The radius of the Solar System actually has a lot of debate.  Once you get out past Neptune and the Dwarf Planets (Pluto and its friends) it gets a bit tricky where the edge of the Solar System

2014-04-11 Planet formation:

The key is actually nuclear physics.  In order to get higher order elements (i.e. elements with more protons and neutrons than hydrogen), you need something called neutron capture.  Since most of the gas

2014-04-10 the sun:

The Sun gets its energy through nuclear fusion.  Nuclear fusion is the process of combining two atoms together, creating a new atom but also creating energy in the process.  This is the opposite of nuclear

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