| Subject | Date Asked | Expert |
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| 25,800 years ago | 11/12/2009 | Ed |
Q: I am just wondering what if we even have a clue happened 25,800 years prior to the year 2012? Just ...
A: David, that crazy "2012" movie, etc, is just a bunch of hooey. We do know some things about ...
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| space travel | 11/12/2009 | Jesse Martinez |
Q: Why does it take so long for a probe to reach the outer solar system. I am studying physics and have ...
A: Physics is an interesting subject. You have come across an idea that fascinates most. Yes, even slow ...
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| TRUE Age of our Universe? | 11/11/2009 | Paul Wagner |
Q: Wagner, I have devoted quite some time attempting to locate a knowledgeable astrophysicist to ...
A: This is a great question--and even though I am not an astrophysicist, I do more or less know where ...
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| Neutron star formation with different forces | 11/10/2009 | Philip Stahl |
Q: Would it be possible that a collapsing star directly become a neutron star without lightening up if ...
A: again, Your speculations are quite interesting (as are Susskind's) - but in general I tend to be ...
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| Hyper Novas & Galaxies Black Holes | 11/10/2009 | Philip Stahl |
Q: I'm a young astrologist and I know about super novas. On google i have seen hyper novas, and I'm ...
A: First of all, there's no such thing as an "astrologist'. You have astrologers, and astronomers - but ...
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| Neutron star formation with different forces | 11/9/2009 | Philip Stahl |
Q: Would it be possible that a collapsing star directly become a neutron star without lightening up if ...
A: The trouble with most appeals to some kind of "fine tuning" of the constants of nature is: 1) most ...
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| Neutron star formation with different forces | 11/9/2009 | Philip Stahl |
Q: Would it be possible that a collapsing star directly become a neutron star without lightening up if ...
A: Alas, if the changes noted by you were in effect, it would be doubtful there'd be any stars at all. ...
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| earht | 11/9/2009 | Tom Whiting |
Q: what is the age of earth?.how the earth formatted from starting?
A: The age of the Earth...and Solar System...is estimated at 4.6 billion years. This age is the ...
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| the largest star | 11/7/2009 | Steven LJ Russo |
Q: I have read that the largest star is VY Canis Majoris and that it is 2100 times the diameter of our ...
A: Yes, to my knowledge, VY Canis Majoris is 2600 solar radii in diameter, making it the largest KNOWN ...
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| Kepler’s Law of Periods | 11/7/2009 | Philip Stahl |
Q: Can you please show me step by step how to use Kepler’s Law of Periods to find the period of the ...
A: Actually - the mass of the Sun is 1.99 x 10^30 kg Anyway, we begin by setting the gravitational ...
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| measuring the moon | 11/5/2009 | Tom Whiting |
Q: I need help figuring some things out about the moon with some data I have gathered. I have observed ...
A: If you are really interested in where the moon is located in the night sky from night to night (and ...
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| Lunar rilles | 11/3/2009 | Courtney Seligman |
Q: i saw your answer about Lunar rilles but the other expert said "The surface of the moon is replete ...
A: If such a thing had ever occurred, we should see immense cracks where things were put back together, ...
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| Meade 290-C focuser | 11/3/2009 | Paul Wagner |
Q: I was given a Meade 290-C telescope but it is missing the focuser. Meade no longer stocks the part ...
A: You might find this article interesting---it's about this type of scope, and what serious amateurs ...
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| planet visible near moon | 11/2/2009 | Harry Hayfield |
Q: I live just outside of Philadelphia, Pennsylvania in the U.S. Last night (November 1st, 2009)around ...
A: If you are able to e-mail me a copy of the pictures (harryhayfield@googlemail.com) that would allow ...
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| Lunar rilles | 11/2/2009 | Courtney Seligman |
Q: i saw your answer about Lunar rilles but the other expert said "The surface of the moon is replete ...
A: I read the answer I believe you're referring to, and the page you linked to. The latter makes a ...
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| Solar flares/UV radiation | 11/2/2009 | Philip Stahl |
Q: Is it possible for solar flares or some other solar activity to bombard Earth with increased UV ...
A: Unfortunately, there are few genuine scenarios for such an event unless the flare was absolutely ...
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| built-in barlow | 10/29/2009 | Tom Whiting |
Q: Whiting: I recently purched a Celestron Powerseeker 127 EQ. The label on the scope says that it has ...
A: Sorry, but I'm not up on the newer scopes with the built-in barlows, built-in eyepieces, permanently ...
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| built-in barlow | 10/29/2009 | Paul Wagner |
Q: Wagner: I recently purchased a celestron powerseeker 127 Eq. The label on the scope says 1000mm but ...
A: the short answer here is that if the scope was designed to incorporate this Barlow into its focal ...
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| Meade 290-C focuser | 10/28/2009 | Paul Wagner |
Q: I was given a Meade 290-C telescope but it is missing the focuser. Meade no longer stocks the part ...
A: I am not surprised that you didn't get much help from customer service! But I want to ask a ...
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| Orange Oscillating Star | 10/28/2009 | Tom Whiting |
Q: I live in Omaha, NE. Currently in the night sky beginning at dusk I can see a yellow/orange star ...
A: Yes, that is the very bright zero magnitude star Capella in the constellation Auriga. It's common ...
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| expansion of the universe | 10/27/2009 | Courtney Seligman |
Q: !! Here is myGiven that the expansion rate of the universe is 74.2 ±3.6 ...
A: It is correct that the objects we now see as they were 13.7 billion years ago are now much farther ...
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| expansion of the universe | 10/26/2009 | Courtney Seligman |
Q: !! Here is myGiven that the expansion rate of the universe is 74.2 ±3.6 ...
A: The problem is your units (and a probable decimal place error). The "observable" Universe is 13.7 ...
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| Quasars | 10/24/2009 | Jesse Martinez |
Q: Why do quasars find at the end of the Universe only?
A: Forgive the lateness of this answer. I hope it can still be of help. I believe the question you are ...
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| Astronomy and "global warming" | 10/23/2009 | Philip Stahl |
Q: Is "global warming" affecting the amateur astronomer? Do you have any images from the past to ...
A: I am really not sure what you mean by global warming "affecting the amateur astronomer". Do you mean ...
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| Astronomy and "global warming" | 10/23/2009 | Paul Wagner |
Q: Is "global warming" affecting the recreational astronomer? Do you have any images from the past to ...
A: It's hard to say how climate change would affect the recreational astronomer. Maybe there would be ...
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| Astronomy and "global warming" | 10/23/2009 | Steven LJ Russo |
Q: Is "global warming" affecting the recreational astronomer? Do you have any images from the past to ...
A: Well, the question is interesting. Interesting because Global Warming does not exist the way we ...
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| Astronomy and "global warming" | 10/23/2009 | Tom Whiting |
Q: Is "global warming" affecting the recreational astronomer? Do you have any images from the past to ...
A: First, there is no global warming. In fact, if you check your numbers yourself, you'll find there is ...
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| Global warming and astronomy | 10/23/2009 | Ed |
Q: Is "global warming" affecting the recreational astronomer? Do you have any images from the past to ...
A: Matt, I am really sorry that I am really late with this question. I forgot to tell AllExperts I ...
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| gravity and orbits | 10/18/2009 | Ed |
Q: I'm confused about gravity and orbits. Basically my question is if the Earth's gravity is strong ...
A: Josh, I am very sorry I haven't answered this yet. I should have told AllExperts I was on vacation. ...
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| 4.5 or 5 inch newtonian reflector | 10/18/2009 | Paul Wagner |
Q: Wagner; I am on a limited budget and am considering either a 4.5 or 5 inch newtonian reflector by ...
A: There is little difference between these scopes---except that the 5 inch wll gather a bit more ...
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| Anomaly... | 10/17/2009 | Philip Stahl |
Q: Is there any public evidence(study,record)to support the continuing theory that there may be another ...
A: The "Nibiru" stuff is all basically claptrap. At a Meeting of the AAS Dynamical Astronomy Division I ...
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| Star Discovery | 10/16/2009 | Jesse Martinez |
Q: Who discovered the star Thuban also known as Alpha Draconis? when did he discover it? Also what is ...
A: Interesting question. Thuban AKA, Alpha Draconis was known to the ancients. It was the brightest ...
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| Earth Magnetism | 10/12/2009 | Tom Whiting |
Q: What do you know about the Earth's magnetic fields? What causes them to change? How does the ...
A: I'm not a big expert on the Earth's magnetic field (singular, not plural)...but I know a little ...
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| Big Bang Theory | 10/12/2009 | Courtney Seligman |
Q: Was there at least one inward secondary shock-wave during the initial expansion from the big bang, a ...
A: There wouldn't be any reflected wave, because that requires a surface to reflect off of, and no such ...
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| orbital disturbance | 10/11/2009 | Jesse Martinez |
Q: What would occur if a rocket was launched from earth with enough force to push the moon further from ...
A: Well Barry, I doubt that any rocket could exert enough force to move the moon in such a manner. Even ...
|
| Uranus and Neptune size comparison | 10/11/2009 | Steven LJ Russo |
Q: I was always of the understanding that Uranus was slightly bigger than Neptune but then I saw a ...
A: MASS is different than SIZE. Uranus is about 32,000 miles across. Neptune is about 31,000 miles ...
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| Radiation | 10/10/2009 | Jesse Martinez |
Q: 3 If Earth were completely blanketed with clouds and we couldn't see the sky, could we learn about ...
A: If the earth was perpetually covered with the clouds you see on any overcast day when no shadows are ...
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| Radiation | 10/10/2009 | Tom Whiting |
Q: What do radio waves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma ...
A: You've just named off all the forms of radiation on the electromagnetic spectrum. All of those are ...
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| Radiation | 10/10/2009 | Tom Whiting |
Q: What is diffraction, and how does it relate to the behavior of light as a wave?
A: You can do 3 things with light....reflect it, refract (bend) it, or diffract (split) it. One can ...
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| East is east and west is west | 10/7/2009 | Paul Wagner |
Q: If east is east and west is west, why does where the sun rises and sets vary by such a huge amount ...
A: I am sorry to have to tell you that the magnetic field of the Earth is yet ANOTHER variable in the ...
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