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Bhavdeep
member


Reged: 07/18/08
Posts: 37
Jupiter's 4 moons new
      #2609837 - 08/28/08 02:38 PM

It was my second observing session. My family was over at my place for dinner and I wanted to show my 5 yrs old nephew what Jupiter looks like through a scope. I setup my 6" newt for cooldown in my backyard. After about 40 mins or so, I went out and pointed it to Jupiter, put in the 26mm EP at 27x for a nice view of the planet and its 4 moons.

I invited my nephew and asked him to take a peek. He looked and I explained to him what he was looking at. He said it was cool. I then told him to look up in the sky so I can show him where Jupiter was. He looked up and asked me a couple of questions, which I answered.

Now my sister came out, said she wanted to look at it too. I pointed up in the sky at Jupiter and asked her to take a look in the scope. I told her that she should also see 2 dark bands across the disc and that they were clouds on Jupiter. She saw through the EP for about 40 secs to a minute.
I asked her if she saw the moons and the cloud bands, and she said yes to both. I thought it was impressive for someone looking for the first time to make out the cloud bands.

She then looked up into the sky and said, yes, I can still see them. While pointing her finger towards the planet, she said, "There's Jupiter and there are the moons". I asked her, "Do you see the moons?". She said, still pointing her finger at it, "Yes, there they are, right there, see?"

I though for a second that maybe, just maybe, due to some complex atmospheric conditions, a tunnel may have been created, removing all the earthly light, pollution & atmosphere and created a direct link between the Jovian system and my backyard sending enough light through 390 million miles of space, so my sister could see the 4 moons from my Red/Orange Zone site through her eyes.

Then I thought, naah... Thats not going to happen, not in the next billion or so years. Maybe in the future if there is no atmosphere left on earth... That though got me to thinking, What do the astronauts see from out there? What mag stars can they see from earth orbit? And are they able to see the 4 bigger moons of Jupiter?

Continuing from where I left, I explained to my sister how small the moons were and what she was seeing through her naked eyes were stars. My dad came out next and I invited him to see too. He looked through the scope, then he looked up into the sky and guess what he said?
"Yes I see Jupiter and its moons. They are right there", he said, pointing his finger in that direction.


--------------------
6" ebay reflector (temporary scope till I save for a Z10)
green laser pointer
skymaps for charts


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Protheus
Vaguely offended
*****

Reged: 09/01/07
Posts: 4658
Loc: Illinois, US
Re: Jupiter's 4 moons new [Re: Bhavdeep]
      #2609878 - 08/28/08 02:59 PM

Quote:


"Yes I see Jupiter and its moons. They are right there", he said, pointing his finger in that direction.





I guess there's a family resemblance... You could have them remember where the moons are, and compare the positions to those of the naked-eye-visible background stars. It should be obvious that those aren't the same... unless they are.

Chris

--------------------
"To tread the sharp edge of a sword;
to run on smooth-frozen ice,
one needs no footsteps to follow..."

"Well, people sometimes ask me 'how did you get involved in astronomy?' I said 'I got born, what's your problem?'" -- John Dobson

"In discussing the large-scale structure of the cosmos, astronomers sometimes say that space is curved, or that the universe is finite but unbounded. Whatever are they talking about?" -- Carl Sagan


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tigerroach
sage


Reged: 08/13/08
Posts: 314
Loc: Houston, TX
Re: Jupiter's 4 moons new [Re: Bhavdeep]
      #2609883 - 08/28/08 03:02 PM

She was probably seeing nearby stars in the background, Jupiter is in a crowded field these days...

I remember when Shoemaker-Levy hit Jupiter, and the first evening I saw the spots I was on the porch looking at them, just out of my mind with amazement. A friend of mine showed up, and I hustled him over to the eyepiece. "Look! Huge black splotches in the southern hemisphere!"

All he cared about was the moons...

--------------------
Brian

TeleVue TV-102, Gibralter alt-az mount
Webster 14.5" f/4.3 truss dob *under construction*
Canon 10x30 IS binocs



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fastrudy
super member


Reged: 04/09/06
Posts: 164
Re: Jupiter's 4 moons new [Re: tigerroach]
      #2610916 - 08/28/08 11:02 PM

Well, I can only see the moon with the help of the 10x50 binoculars, and only when the image is stabilized. Take those people out tomorrow and ask them to sketch the moon arrangement with their naked eye, then compare to this:

juplet

Then you will know if they are capable of resolving Jupiter's moons!!

Please let us know! IIRC, historically, some astronomers were capable of this amazing feat.

--------------------




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star drop
Guilty as Charged
*****

Reged: 02/02/08
Posts: 3286
Loc: Cattaraugus Co., NY
Re: Jupiter's 4 moons new [Re: Bhavdeep]
      #2611814 - 08/29/08 01:08 PM

When I first started out in astronomy I was in my twenties. I could discern the phases of Venus naked eye but could not see Saturn's rings or Jupiter's moons. It may be posible for someone with better eyesight.

--------------------
Ted


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Exit-pupil
sage
*****

Reged: 11/13/07
Posts: 206
Loc: Eastern Long Island, NY
Re: Jupiter's 4 moons [Re: star drop]
      #2612573 - 08/29/08 08:40 PM

I was just reading that the magnitude of the moons are well within naked eye limits, and it's only the glare from Jupiter's brightness that prevents us from seeing them. Well, most of us, anyway.

Jono


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steveeb
sage
*****

Reged: 05/06/08
Posts: 209
Loc: Murrieta, CA
Re: Jupiter's 4 moons new [Re: Exit-pupil]
      #2613836 - 08/30/08 04:24 PM

You should have tested them last night since two of the four moons were eclipsed. "How many do you see now". If they say four... you know something's up.

--------------------
Steve


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