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Astronomy/Expert Profile

Courtney Seligman

U.S.

On Vacation
returns 12/31/2012

Expertise

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.

Experience in the area

I have been a professor of astronomy for over 40 years, and am working on an online text/encyclopedia of astronomy.

Publications

Astronomical Journal, Publications of the Astronomical Society of the Pacific (too long ago to be really relevant, but you could search for Courtney Seligman on Google Scholar)

Education/Credentials

I received a BA in astronomy and physics and a MA in astronomy, both from UCLA. I was working on my doctoral dissertation when I started teaching, and discovered that I preferred teaching to research.

Awards and Honors

(too long ago to be relevant, but Phi Beta Kappa and Sigma Xi still keep trying to get me to become a paying member)

Average Ratings

Recent Reviews from Users

User	Date	K	C	P	Comments
George	01/15/12	10	10	10	His comments were very informative
Joot	10/31/11	10	10	10	Thank you very much for your response!
Peter	10/21/11	10	10	10	Thank you very much for taking what .....
Richard	10/19/11	10	10	10	Thankyou very much Courtney. Its great to .....
Remus	09/20/11	10	10	10	Thank you!

Recent Answers from Courtney Seligman

2012-01-12 NGC pics:

Here is the page with information about accessing the Sloan Digital Sky Survey database: http://www.sdss3.org/dr8/ (I saw on another page that you can access the data as images of various sorts, so you'd

2011-12-05 black holes:

They fall into the singularity (the point of infinite density, temperature, and gravity) at the center of the hole. While falling toward that point they are stretched by tidal forces (the difference between

2011-11-29 big bang/void:

Presuming the origin of the Big Bang is as generally thought -- a single point of space-time in some prior Universe accidentally contained an essentially infinite quantum energy which created a completely

2011-10-30 can meteors change direction?:

Meteors (or more accurately, the meteoroids that produce meteors) can change their path, usually as a result of fragmentation caused by the heat and pressure of their passage through the air. Even rocky

2011-10-20 A thought experiment:

I'm afraid the answer is no, we can't look into our past. When we say that we can look "into the past", we mean that when we look at very distant galaxies, we see them as they were when the light by

Astronomy

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