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BEGINNERS' STARGAZING QUIZ (QM)

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onewithnature
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BEGINNERS' STARGAZING QUIZ (QM)

Unread post by onewithnature » Wed Jan 22, 2014 2:16 am

Right, let's surprise you even more. (I LOVE surprises!)

(i) How many stars do you think we could see if we were in Space, say a few thousand kilometres from Earth?

(ii) How many stars are there in our own Milky Way Galaxy?
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Re: BEGINNERS' STARGAZING QUIZ (QM)

Unread post by Timepilot » Wed Jan 22, 2014 4:44 am

i) Interesting, I would hazard a guess that it is at least 20,000 given that you should now be able to see more of the sky.

ii) 300 billion if I recall correctly.
“ Every year elephants were becoming scarcer and wilder south of the Zambezi, so that it had become impossible to make a living by hunting at all. ” FC Selous 1881

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Re: BEGINNERS' STARGAZING QUIZ (QM)

Unread post by Phokojwe » Wed Jan 22, 2014 4:09 pm

:hmz: Good question OWN

(i) I would say approximately 15 million.
(ii) An estimated 400 billion
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onewithnature
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Re: BEGINNERS' STARGAZING QUIZ (QM)

Unread post by onewithnature » Fri Jan 24, 2014 12:55 am

Anyone else?
EVERYBODY'S TR!
TR: A NEW DAY IS S-OWN
TR: NECTAREAN NICETIES OF THE NORTH
TR: PRIMEVAL PLEASURE

"Outside of a dog, a book is a man's best friend. Inside of a dog, it's too dark to read." (Groucho Marx)

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onewithnature
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Re: BEGINNERS' STARGAZING QUIZ (QM)

Unread post by onewithnature » Tue Feb 18, 2014 8:43 am

:whistle:
EVERYBODY'S TR!
TR: A NEW DAY IS S-OWN
TR: NECTAREAN NICETIES OF THE NORTH
TR: PRIMEVAL PLEASURE

"Outside of a dog, a book is a man's best friend. Inside of a dog, it's too dark to read." (Groucho Marx)

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Re: BEGINNERS' STARGAZING QUIZ (QM)

Unread post by Phokojwe » Thu Feb 20, 2014 11:44 am

:think: :wall:
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onewithnature
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Re: BEGINNERS' STARGAZING QUIZ (QM)

Unread post by onewithnature » Fri Feb 21, 2014 1:36 am

I'll give the answer tomorrow ...
EVERYBODY'S TR!
TR: A NEW DAY IS S-OWN
TR: NECTAREAN NICETIES OF THE NORTH
TR: PRIMEVAL PLEASURE

"Outside of a dog, a book is a man's best friend. Inside of a dog, it's too dark to read." (Groucho Marx)

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onewithnature
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Re: BEGINNERS' STARGAZING QUIZ (QM)

Unread post by onewithnature » Sat Feb 22, 2014 2:02 am

TP, spot on with the first one. :clap: :clap: PK, when I was growing up, I also imagined seeing so many stars in Space that I wondered how you could see where you were going. I even thought it could be like daylight. Of course, the strange reality is that we see not more than about 20000 to 30000 stars when we're beyond the Earth's atmosphere, mainly because of the limitations of the human eye. In Space, then, you'd see about twice the equivalent of what you'd see on a high mountain top on Earth on a clear, non-polluted night; as TP pointed out, the difference between Earth and Space (if you're a few thousand kilometres from Earth) is that you have the horizon to block half of your view on Earth, whereas one would see 360 degrees in Space.

As to the number of stars in our Milky Way galaxy, there is ongong debate on this subject and wide variation: anywhere from a conservative estimate of 100 billion stars to a much more liberal 400 billion stars. The most common estimates seem to be about 300 billion, so well done to both of you. :clap: Of course, three-hundred thousand million suns is nothing to sneeze at; certainly a number that no-one has any idea how to rationalise or imagine.
EVERYBODY'S TR!
TR: A NEW DAY IS S-OWN
TR: NECTAREAN NICETIES OF THE NORTH
TR: PRIMEVAL PLEASURE

"Outside of a dog, a book is a man's best friend. Inside of a dog, it's too dark to read." (Groucho Marx)

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Re: BEGINNERS' STARGAZING QUIZ (QM)

Unread post by onewithnature » Sat Feb 22, 2014 2:05 am

Let's move on ...

What is the most famous, and possibly the only, nebula that one can see with the naked eye from Earth? Also, where is it situated and how visible is it (qualitatively speaking)?)
EVERYBODY'S TR!
TR: A NEW DAY IS S-OWN
TR: NECTAREAN NICETIES OF THE NORTH
TR: PRIMEVAL PLEASURE

"Outside of a dog, a book is a man's best friend. Inside of a dog, it's too dark to read." (Groucho Marx)

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Re: BEGINNERS' STARGAZING QUIZ (QM)

Unread post by Timepilot » Mon Feb 24, 2014 7:54 am

I would go with the Orion nebula (M42) which is situated just below Orion's belt as the middle "star" in Orion's sword.

This is actually quite visible and appears as a sort of fuzzy star. Even with a pair of bino's or a small telescope one can see it as a nebula.
“ Every year elephants were becoming scarcer and wilder south of the Zambezi, so that it had become impossible to make a living by hunting at all. ” FC Selous 1881

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Re: BEGINNERS' STARGAZING QUIZ (QM)

Unread post by Phokojwe » Tue Feb 25, 2014 2:28 pm

I agree with Timepilot :thumbs_up:
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Re: BEGINNERS' STARGAZING QUIZ (QM)

Unread post by onewithnature » Sun Mar 02, 2014 8:31 am

Yes, well done TP. :clap: :clap: The only nebula truly visible to the naked eye, it is visible in most localities on Earth, even with a fair degree of light pollution around. TP, I'm not sure if one can recognise it as a nebula through binocs or a small telescope (my bank balance is too low at the moment to afford a good one), but the fuzziness is certainly obvious.
EVERYBODY'S TR!
TR: A NEW DAY IS S-OWN
TR: NECTAREAN NICETIES OF THE NORTH
TR: PRIMEVAL PLEASURE

"Outside of a dog, a book is a man's best friend. Inside of a dog, it's too dark to read." (Groucho Marx)

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Re: BEGINNERS' STARGAZING QUIZ (QM)

Unread post by Stampajane » Sun Mar 02, 2014 8:40 am

I'll definitely look at Orion's Sword with a different eye!

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Re: BEGINNERS' STARGAZING QUIZ (QM)

Unread post by onewithnature » Sun Mar 02, 2014 8:54 am

Or maybe both eyes, Stampajane. :twisted: It's quite easy to locate: for those of you that don't know, Orion is well visible during the Southern Hemisphere's summer, and pretty much all over the world at various times of the year. The sword lies close to, and approximately at right angles, to the famous three-star belt of Orion, and also seems to consist of three stars. The middle "star" is the Orion Nebula; grab some binocs and check it out. :thumbs_up:
EVERYBODY'S TR!
TR: A NEW DAY IS S-OWN
TR: NECTAREAN NICETIES OF THE NORTH
TR: PRIMEVAL PLEASURE

"Outside of a dog, a book is a man's best friend. Inside of a dog, it's too dark to read." (Groucho Marx)

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Re: BEGINNERS' STARGAZING QUIZ (QM)

Unread post by Timepilot » Tue Mar 04, 2014 1:18 am

onewithnature wrote:Yes, well done TP. :clap: :clap: The only nebula truly visible to the naked eye, it is visible in most localities on Earth, even with a fair degree of light pollution around. TP, I'm not sure if one can recognise it as a nebula through binocs or a small telescope (my bank balance is too low at the moment to afford a good one), but the fuzziness is certainly obvious.


I was down at the farm over the weekend where there is practically no light pollution - hauled my spotter scope out and you can see it is a nebula - it is nothing like the pics but you can tell the difference between that and a star or planet.
“ Every year elephants were becoming scarcer and wilder south of the Zambezi, so that it had become impossible to make a living by hunting at all. ” FC Selous 1881


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