| Subject | Date Asked | Expert |
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| Astronomia | 11/20/2008 | Courtney Seligman |
Q: What is supporting the solar system; I mean, what is down it? Quisiera saber si los demas planetas ...
A: No, there isn't; at least, not in the sense I think you mean. Your question suggests that if ...
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| Astronomia | 11/19/2008 | Courtney Seligman |
Q: What is supporting the solar system; I mean, what is down it? Quisiera saber si los demas planetas ...
A: Nothing is "supporting" the Solar System, as there is no "down" in space, save for the direction to ...
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| interview questions | 11/18/2008 | Courtney Seligman |
Q: 1. How did you get involved in astronomy? Do you enjoy this profession? ...
A: 1. I've been interested in astronomy all my life, but the critical event was my attendance at the ...
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| Weird flash | 11/18/2008 | Philip Stahl |
Q: this has bugged me for ages. I'm a professional sailor and have spent many evenings in the middle of ...
A: Given the absence of much more (specific) data it is virtually impossible to even speculate as to ...
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| High and Low mass stars! | 11/18/2008 | Jayendra Upadhye |
Q: can you tell me which of these belongs in the catagories of: 1. HIGH MASS STARS or 2. LOW MASS ...
A: 1 - High mass stars:- *late in life fuse carbon into heavier elements *end life as a supernova *have ...
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| moon | 11/17/2008 | Philip Stahl |
Q: I would like to know if the people in the western hemisphere see the same moon to the people in the ...
A: Your question is not entirely clear. You are asking how the Moon appears in the "western hemisphere" ...
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| Measurement in space | 11/17/2008 | Courtney Seligman |
Q: What exactly is a parsec? I don't understand why astronomers would use this instead of light-years, ...
A: When measuring the distance of a star, its apparent displacement in direction, due to our motion ...
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| The Moon | 11/16/2008 | Steven LJ Russo |
Q: My sister has just come back from Oman and she said she couldn't see the moon in the night sky ...
A: As far as the Stars, maybe there was too much "light Pollution". But the Moon is easy to figure. On ...
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| planet formation | 11/16/2008 | Courtney Seligman |
Q: Can you explain some of the processes involved in the alleged planet formation from dust particles ...
A: I can see that my answer didn't directly address your main concern. Thanks for the clarification. ...
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| The Moon | 11/16/2008 | Steven LJ Russo |
Q: My sister has just come back from Oman and she said she couldn't see the moon in the night sky ...
A: Mark. It actually depends on the dates she was there. Regardless of where you are, Oman, France, ...
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| planet formation | 11/15/2008 | Courtney Seligman |
Q: Can you explain some of the processes involved in the alleged planet formation from dust particles ...
A: During the earliest stages of the formation of the Solar System, there would have been huge numbers ...
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| About True Polar Wander theory | 11/14/2008 | Courtney Seligman |
Q: According to True Polar Wander theory, if a supersized volcano is on earth, then our planet would ...
A: If it were possible for large structures (supersized volcanoes or continents) to not have deep ...
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| Lots of questions | 11/14/2008 | Paul Wagner |
Q: I've been waiting eagerly for your return.Hope you had fun in your vacation.I know you got bored ...
A: I was actually working---traveling through the US and Europe onn business. But now I am back and ...
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| astronomy | 11/14/2008 | Courtney Seligman |
Q: Why does the moon appear to be "upside down or rotated to the right" in the morning or when it is ...
A: (Please excuse the delay in answering this question. Apparently, whomever it was directed to ...
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| on stars | 11/14/2008 | Philip Stahl |
Q: I noticed that usually same 3 or 4 stars is always visible after sunset initially. Is that because ...
A: It is probably more likely that these "3 or 4 stars" are brighter (have lower apparent magnitudes) ...
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| Comet-Like Knots Around a Dying Star in the Helix Nebula | 11/13/2008 | Philip Stahl |
Q: Dr. Stahl, Please tell me what is involved in the formation of comet-like objects such as those ...
A: Good questions all! First, let me emphasize the "cometary" description, not "comets" literally. ...
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| large ring around the moon | 11/13/2008 | Tom Whiting |
Q: Time viewed: after 10:30pm, Nov. 12, 2008 from Glenville, NY (near Schenectady, NY) with the naked ...
A: You are seeing the very common 22 degree halo around the bright moon, caused by ice crystals in the ...
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| matter | 11/12/2008 | Jayendra Upadhye |
Q: I witnessed to someone recently about God, and he opts to believe in eternal matter. He claims that ...
A: The two of you are having a commendable debate! I will add my tuppence worth.. The singularity that ...
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| stars visibility | 11/11/2008 | Philip Stahl |
Q: When we observe the sky after sunset, we see only 3 or 4 stars. As night arrives, we see more stars ...
A: Relatively fewer stars are visible earlier in the evening because of astronomical twilight which can ...
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| climate change | 11/11/2008 | Philip Stahl |
Q: Sir, Are you familiar with the studies being done at the Danish national space Center(institute) on ...
A: I'm really sorry but it doesn't help at all. The first link you posted brings up the message: "The ...
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| astrology physics | 11/10/2008 | Jayendra Upadhye |
Q: How can an element like lead, which is heavier than iron, contain a proton from hydrogen? (H gas ...
A: I could not grasp what you had in mind when you typed the sequence "(H gas cloud --8x ...
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| climate change | 11/10/2008 | Philip Stahl |
Q: Sir, Are you familiar with the studies being done at the Danish national space Center(institute) on ...
A: Sorry - but I've seen no such studies referenced in any publication, nor have I heard of them. Can ...
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| stars and light | 11/10/2008 | Philip Stahl |
Q: If some of the stars we see may have actually died long ago and it has taken that long for the light ...
A: In answer to your first question, the time depends on how far away the star is - given that the ...
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| movement of the sun | 11/9/2008 | Ed |
Q: my question is , how can i measure the different horizontal angles of the sun if i am on known ...
A: Hatim, I am sorry, I should have answered this earlier but I have been sick. You don't need to know ...
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| Comet-Like Knots Around a Dying Star in the Helix Nebula | 11/9/2008 | Philip Stahl |
Q: Dr. Stahl, Please tell me what is involved in the formation of comet-like objects such as those ...
A: First of all, any protostar -type object (including the early Sun) will spin off detritus in the ...
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| planet formation | 11/8/2008 | Courtney Seligman |
Q: Can you explain some of the processes involved in the alleged planet formation from dust particles ...
A: You can find a detailed, albeit somewhat scattershot discussion of this topic on my website, ...
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| Spacetime continumm | 11/7/2008 | Tom Whiting |
Q: i know less abt this topics .lately some one told me he is for ever as diamonds are for ever .I told ...
A: The spacetime continuum (not the matter in the Universe, the space and time) could very well ...
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| space | 11/6/2008 | Ed |
Q: who named the constelation draco?
A: It seems to have been named this in ancient, ancient times, before individual people were given ...
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| earth | 11/6/2008 | Courtney Seligman |
Q: What would happen if an object the size of Pluto rammed into earth at the speed of sound? Would ...
A: When any object hits the Earth, it does so with at least the escape velocity of the Earth, which is ...
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| Star to East of Orion's Belt | 10/29/2008 | Tom Whiting |
Q: I know virtually nothing about astronomy. There is a bright star to the East of Orion's belt. I'm ...
A: Yes, in fact all stars have a name and are part of something larger, called a constellation. If not ...
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| Earth's tilt | 10/29/2008 | Ed |
Q: I am working with a 6th grade class on seasons, and one student asked how we know the Earth is ...
A: Aaaahh, I am at a library right now and they close in 10 minutes. Get back to me Saturday if my ...
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| cluster off Orion's belt | 10/29/2008 | Tom Whiting |
Q: here is my question. At about 4 in the morning in Portland, Or (Oct 20thish) Orion is in my SW sky. ...
A: Well, the only other option I see on my star chart is the littlegrouping of stars that make up the ...
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| astronomy | 10/28/2008 | Patrick Clevenger |
Q: Can a red giant star be 30 solar masses? Thanks
A: Typical, a star of 30 solar masses and is red would be considered a supergiant, rather than a giant. ...
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| A second question | 10/27/2008 | Tom Whiting |
Q: I know how to point out saturn.but the telescope information i can get here in my country is ...
A: Focal ratio determines the degree of curvature of the primary mirror. f3 to f6 are considered fast ...
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| telescope | 10/27/2008 | Courtney Seligman |
Q: can you please help me with this question Explain how visual telescope shows the temperature and ...
A: Hotter stars give off a greater percentage of blue and ultraviolet radiation than cooler stars, ...
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| Venus | 10/27/2008 | Tom Whiting |
Q: Since the atmosphere of Venus is continuously being stripped by the solar winds, does any of it end ...
A: In reverse order, I would think that the planet is geologically active in part due to the high ...
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| lunar mass and revolutions | 10/26/2008 | Philip Stahl |
Q: if mass or weight is added to the moon,such as astronauts and/or moon bases, overtime will the added ...
A: The mass of the Moon is ~ 7.5 x 10^22 kg. Even ten astronauts would not exceed 2000 kg, or a ...
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| sun exposure | 10/22/2008 | Courtney Seligman |
Q: what would happen if someone was never exposed to the sun?
A: This is more a biology question than an astronomy question, but having some experience with the ...
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| Sun's angle at sun rise and sun set | 10/22/2008 | Patrick Clevenger |
Q: Let me give you more detail and make the question more clear. My friend and I go camping in the ...
A: Generally, the Sun will rise slightly north of due east in the summer, and slightly south of east in ...
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| bright object in sky | 10/22/2008 | Philip Stahl |
Q: I live in San Marcos Texas. For the past few nights I've noticed this really bright object in the ...
A: Well I checked for the time and location you gave and it isn't Venus. In that direction and time it ...
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