Hydra


As there are no rules- we can ask what we like! Keeping it astronomy based would be good though...

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BINGO! S'pose that was kinda easy though....

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hmmm

What are the seven spectral classes for stars

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OBAFGKM

Oh, Be A Fine Girl; Kiss Me. 'll never forget that one. :P

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Correct

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What is the sun's spectral type?

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G2 (two girls)

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Hey that's a nifty idea. :P You were right, but I'd never heard of the "two girls" thing.

Yellow

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yellow? I thought it was white? or green? or ARGHHH


Hmmm
surface?
It's about 4'000 5'000 degrees C I think :-k... I've got a mind block #-o


I'm bad with theese # ones.... #-o

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5,800 C (or is it K? H-R diagrams have always been in C, right?)

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It probobly fluctuates more than 273degrees anyway.....

What does SOHO stand for?

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Solar Observations.....and....ummm... Heliospheric Orbit?

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"The Solar and Heliospheric Observatory"

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Hey that's unfair...they derived two letters from one word. :P

Who was credited with the invention of the telescope?

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galilo gallii (hard word to spell at 12:30am)

Who was credited for the reflector telescope?

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Actually, it was patented by Hans Lipershey (wrong spelling no doubt), Galileo merely refined his concept. The idea of using two lenses in unison had been thought of many centuries (or millenia) before.

Not quite sure about the reflector, my first guess would be Sir Isaac Newton?

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Sir Isaac Newton

champion_munch beat you to the crunch

anyway I better go to bed now *yawns*

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I should go soon....see how far I can get with this thread tonight. :P

How many moons was discovered by Voyager 2?

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Yup I was at work. Sorry, I looked up the answer to my question, and found that I didn't really phrase it correctly. I was tired, it was late. Yup, that's the excuse I'll go with :wink: . The answer I was looking for was indeed Ergosphere.

Although now that I think about it, wouldn't every rotating body have an Ergosphere around it? Or is it called something different when it is around a star or a planet?

Morning! Sorry, I wouldn't have a clue mate.

Why not start the ball rolling again?

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Do you mean on all Voyager 2 flybys? This was in my Backyard Astronomy book, but I can't remember the exact number--at least 20 or so, because Voyager 1 was Jupiter, and Voyager 2 was Uranus and Neptune, and I remember V-2 found 10 with Uranus alone, and 5 or 6 with Neptune. I can't remember how many between V-1 and V-2 with Saturn. So, I'll take a guess and say 20 before I look it up.

(I knew the Pleiades/Subara one and Hydra, at least ops: )

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Well, I think it's 16 (named) moons discovered by Voyager 2.

At Uranus there was - Cordelia, Ophelia, Bianca, Cressida, Desdemona, Juliet, Portia, Rosalind, Belinda and Puck.

And at Neptune there was - Naiad, Thalassa, Despina, Galatea, Larissa and Proteus.

But Proteus may have been discovered by Earth-bound telescopes just before Voyager arrived at Neptune, and there is still another moon around Uranus that has yet to be confirmed designated a name, but was discovered in 1986 (so I'm assuming that Voyager spotted it).

So .. yeah, you can ask a question now if you want.

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No, :wink: we must find out for sure. I'm going to look up it now, but thanks. I need to see how many by Saturn by V 1 and V2. Who can remember this by heart??

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Die Sonne scheidet hinter dem Gebirge. In alle Täler steigt der Abend nieder
mit seinen Schatten, die voll Kühlung sind.

I don't think that Voyager 2 discovered any moons around Jupiter or Saturn, but I'll look it up just to make sure.

EDIT: Turns out that Larissa was discovered before Voyager 2 found it, so there's 15.

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OK, my book says "Voyager 2 confirmed the existence of 5 thin rings around Neptune and added six satellites to the two already known." It says 10 for Uranus. It doesn't split up Saturn V-1 and V-2, just a picture of 5 moons, but it's a composite. They probably were all by V-1....hmm. Do you know all those moons by heart?

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Die Sonne scheidet hinter dem Gebirge. In alle Täler steigt der Abend nieder
mit seinen Schatten, die voll Kühlung sind.

Who's turn is it?

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Yeah....well, not all of the new ones (gawd there's over 150 now!) but everything up to around the year 2000.

Which 5 moons were in the composite? I don't think Voyager 1 discovered any moons.

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I thought we were figuring out how many moons of Saturn by V-1 or V-2. Do you know for sure. This link didn't help much:

http://www.windows.ucar.edu/tour/lin...s/voyager.html

Edit add: See, it doesn't divide them up:

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Die Sonne scheidet hinter dem Gebirge. In alle Täler steigt der Abend nieder
mit seinen Schatten, die voll Kühlung sind.

I think we should give Melusine a go; we both asked enough questions last night. :P

Yeah I'm almost 100% sure. I thought we were working out how many moons Voyager 2 found all up?

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