Search found 10 matches

by mgeorge
Wed Oct 26, 2005 3:07 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Moderatorship or Censorship?
Replies: 30
Views: 12975

Keeping the "New Topic" button outside threads (in the list of threads) might solve a lot of problems.
by mgeorge
Mon Oct 24, 2005 5:13 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Relationship of sizes and distances
Replies: 12
Views: 3659

How shall I put this delicately? We are dealing with beliefs.
by mgeorge
Fri Oct 21, 2005 8:15 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Relationship of sizes and distances
Replies: 12
Views: 3659

Here are the relevant BELIEFS in astronomy, see for eg. http://imagine.gsfc.nasa.gov/YBA/HTCas-size/optical.html http://www.talkorigins.org/faqs/astronomy/distance.html A. Size: Size is proportional to distance. This is bedrock theory, not observational bias. B. Distance 1. Beyond about 26,000 LY (f...
by mgeorge
Wed Oct 19, 2005 3:51 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Relationship of sizes and distances
Replies: 12
Views: 3659

It seems anything not well outside our galaxy, say less than 100 times its diameter (100 x 80K LY = 8M LY) does not fit the pattern. Eg. (figures are in LY, distance and diameter): Nebula IC1805, 6K, 200 Nebula "Red Rectangle", 2K, 0.3 Galaxy Andromeda, 2.9M, 220K At greater distances, is ...
by mgeorge
Tue Oct 18, 2005 4:39 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Relationship of sizes and distances
Replies: 12
Views: 3659

Thanks. No doubt, this may be why so much of matter supposed to be out there is "missing". However, I find the narrow relationship between distance and diameter (holding true all the way to the edge of the observable universe) disconcerting. Are our mightiest instruments are biased like us...
by mgeorge
Tue Oct 18, 2005 4:14 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Moderatorship or Censorship?
Replies: 30
Views: 12975

I favour reducing the duplication of topics. However, such dupication is to be expected if an existing title is vague. Once started, can a thread title be "improved"?
by mgeorge
Tue Oct 18, 2005 3:16 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Relationship of sizes and distances
Replies: 12
Views: 3659

Here are the latest postings of nebulae or galaxies on APOD, in light-years: 1. IC405, 1500, 5, http://antwrp.gsfc.nasa.gov/apod/ap051018.html 2. NGC1350, 85M, 130K, http://antwrp.gsfc.nasa.gov/apod/ap051006.html 3. ARP295, 290M, 250K, http://antwrp.gsfc.nasa.gov/apod/ap051008.html 4. NGC613, 65M, 1...
by mgeorge
Sat Oct 15, 2005 5:02 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: cats eye
Replies: 33
Views: 12505

Age of universe

Has any attempt been made to estimated rate of production of the heavier elements and compare that to the known quantities of these present? Eg. how long and how many stars would it take to make the iron and nickel present in the earth's core? How does that compare to the "known" age of th...
by mgeorge
Sat Oct 15, 2005 4:22 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: Relationship of sizes and distances
Replies: 12
Views: 3659

Relationship of sizes and distances

The distances of all galaxies and nebulae posted at APOD over the years seem to be around 1000 times their diameters (with about 50% variation in diameter) i.e. the further away they are, the more diameter (and mass) they seem to have. Does this not mean a very strange universe, with us located at t...