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  #161  
Old 27-09-2005, 08:20 PM
slice of heaven
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Thanks John.
Hewett 1 is over 2 degs, but extremely faint and probably not visible in amateur scopes visually.
http://www.rdcrisp.darkhorizons.org/Hewett1_page.htm
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  #162  
Old 27-09-2005, 08:20 PM
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asimov (John)
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Yeah, I must confess I did'nt bother entering the comp for the same reason Ken..Not my idea of fun. But everyone to their own hey!
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  #163  
Old 27-09-2005, 08:24 PM
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Cheryl gave it a go but found conflicting answers in different googled sites! Work that one out.
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  #164  
Old 27-09-2005, 08:24 PM
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This was my source
"The Largest Known Planetary Nebula on the Sky"
http://www.ing.iac.es/PR/newsletter/news8/science2.html


I also mentioned SH2-216.
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  #165  
Old 27-09-2005, 08:46 PM
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Netwolf
So PG1034+001 is the white dwarf in Hewett1 ?
Therefore Hewett1 comes out on top as the largest ?
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  #166  
Old 27-09-2005, 09:00 PM
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According to a very recent issue of S&T Sh 2-216 is the largest PN. But, just like galaxies, the sizes of these objects are fuzzy, because they are defined by the the ability of the instruments available to distinguish material in the object from the background sky. As the instruments get better, the measured sizes of nebulae and galaxies grow.
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  #167  
Old 27-09-2005, 09:09 PM
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Quote:
Originally Posted by janoskiss
According to a very recent issue of S&T Sh 2-216 is the largest PN. But, just like galaxies, the sizes of these objects are fuzzy, because they are defined by the the ability of the instruments available to distinguish material in the object from the background sky. As the instruments get better, the measured sizes of nebulae and galaxies grow.
So using that assessment Steve the Helix should still be regarded as the largest as neither you nor I can see any of the others in our scopes
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  #168  
Old 27-09-2005, 09:32 PM
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No, Slice, it's not what we as individuals can see. It's about what is known. And what is known is revealed by the best instruments there are here on Earth and also in space.
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  #169  
Old 27-09-2005, 09:40 PM
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I like simple questions like: How far is 'up'?
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  #170  
Old 27-09-2005, 09:57 PM
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Simple questions are the hardest to answer.
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  #171  
Old 27-09-2005, 10:24 PM
ausastronomer (John Bambury)
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Quote:
Originally Posted by slice of heaven
So using that assessment Steve the Helix should still be regarded as the largest as neither you nor I can see any of the others in our scopes
Not IMO

The question was:-

Quote "What is the largest (degrees of arc) planatery nebula?"

I don't see how the Helix fits this criteria in any way other than a lot of people probably gave it as their answer. I don't see the words "visible in 16 telescopes or smaller" anywhere in the wording of the question.

CS-John B
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  #172  
Old 27-09-2005, 10:48 PM
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Gee do we all have to be so pedantic about this? I got all the answers Mike posted after a lot of hard research, some of it quite conflicting. But don't forget it was meant as a bit of fun and the judges decision is final. I knew something like this was going to happen, the site has been getting a bit petty lately and that was the reason I didn't enter the comp. I had a real blsst finding the answers and learnt a lot along the way. That was the real prize for me.

Gazz
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  #173  
Old 27-09-2005, 10:53 PM
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According to Doug Snyder from the Planetary Nebulae Observers Home Page (www.blackskies.com) in an e-mail I recieved from him when replying to the question stated that Hewitt1 was the current largest but that the answer could and would change as new observations with more sensitive equipment were made...
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  #174  
Old 27-09-2005, 11:04 PM
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Gazz, judges decisions may be final, but don't let that stop us arguing about them. It's half the fun!

I'll throw another one in for fun:

"Q 15: What percentage of sunlight is reflected from the Moon?"

What does that say? Consider how much sunlight there is (A) and how much of that light is reflected by the Moon (B). Then the answer to the question is the ratio of B to A in percentage units. And the answer is around a billionth of one percent. Not anywhere near the judges' answer.
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  #175  
Old 27-09-2005, 11:16 PM
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ballaratdragons (Ken)
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I think everyone that entered should be placed in the draw coz you all tried. That's gotta be worth something. Sods like me miss out coz I was too lazy to study and that's fair too.
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  #176  
Old 27-09-2005, 11:21 PM
ausastronomer (John Bambury)
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Quote:
Originally Posted by cahullian
Gee do we all have to be so pedantic about this?. Gazz

Gaz,

Stirring the pot and chewing the fat is 1/2 the fun.

CS-John B
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  #177  
Old 28-09-2005, 12:03 AM
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iceman (Mike)
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Ken,

Next quiz we'll make the question like those raffle tickets..

Quote:
Fill in the blanks..

I_EIN_PAC_
That way, everyone will get off their butt and enter!
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  #178  
Old 28-09-2005, 07:04 AM
slice of heaven
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Quote:
Originally Posted by janoskiss
No, Slice, it's not what we as individuals can see. It's about what is known. And what is known is revealed by the best instruments there are here on Earth and also in space.
Then why quote a source with out of date information that names SH 2-216 as the largest PN?
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  #179  
Old 28-09-2005, 07:07 AM
slice of heaven
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Quote:
Originally Posted by ausastronomer
Not IMO

The question was:-

Quote "What is the largest (degrees of arc) planatery nebula?"

I don't see how the Helix fits this criteria in any way other than a lot of people probably gave it as their answer. I don't see the words "visible in 16 telescopes or smaller" anywhere in the wording of the question.

CS-John B
I agree John
I was only replying to the statement Steve made.
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  #180  
Old 28-09-2005, 07:24 AM
slice of heaven
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Quote:
Originally Posted by cahullian
Gee do we all have to be so pedantic about this? I got all the answers Mike posted after a lot of hard research, some of it quite conflicting. But don't forget it was meant as a bit of fun and the judges decision is final. I knew something like this was going to happen, the site has been getting a bit petty lately and that was the reason I didn't enter the comp. I had a real blsst finding the answers and learnt a lot along the way. That was the real prize for me.

Gazz
Gazz, I only brought the subject up to see which PN rightfully should be wearing the crown,out of pure curiousity, not to doubt the validity of the answers. I Pm'd Mike before submitting the answer to that question and happily accepted his reply.
Yes it was fun doing the search, I learnt a lot more than just the answers to the questions. I cant wait for the next one.
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