George,

They're mostly alpha stars, but as you can see Rigel (Beta Orionis) is included while Betelegeuse (Alpha Orionis) is not. As to whether they are all moving toward/away, or getting dimmer/brighter, that would be an incredible coincidence if true. I suspect they are not.

And no, sadly they do not form an image of Einstein. However (Hint Alert!) their relative positions in the heavens are a very important criteria for inclusion.

Whats the name of the first asteroid found with a small moonlet orbiting it, the name of its moonlet too?

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formulaterp

a crack from the hip without spending any time would be this where used as navigational stars for sailors traversing the southern and northern hemispheres :roll:

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hmm alot of them are super giant stars- but not all.... acrux isn't for example
hm...

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There are still a few other unanswered questions, but I'll answer this one anyway: Ida and the 'moonlet' is Dactyl.

And Arneb, yes I thought it had to be something with the atmosphere, because Triton (among others) are already known to contain atmosphere's. #-o

with regards

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Minbari's guess was extremely close! So I'll give one more clue which should help tie things together, and identify the historic significance of this group of stars.

Three of the lesser known stars I've highlighted, are sometimes referred to by their completely unnoficial names (in parenthesis):

Gamma Cassiopeiae (Navi)
Sigma Puppis (Regor)
Iota Ursae Majoris (Dnoces)

Those three are appolo stars- the first crew named them that backwards or something...

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THey are each on a line of RA?

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Correct! As I've got to get to bed, I'll give mickal credit for answering.

The 37 stars in the 2 images were the ones used for navigation by the Apollo astronauts. The chosen stars had to be easy to identify, but they couldn't simply use just the brightest ones as too many of them are concentrated in specific parts of the sky. The three stars mentioned above did not have common names, so the crew of Apollo I substituted variations of their names spelled backwards.

Navi = Gus "Ivan" Grissom
Regor = "Roger" Chaffee
Dnoces = Ed White "II" (Second)

Ida (parent), and Dactyl (satellite).

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I thought it was my turn

Ok-

I've got one- stand by

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Name this astronomical "object"- there are a number of different names (4 in all) bonus to give me all. (you only need one to be correct however)

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That's one of my favouite open star clusters. :P Some of the stars get burnt out in photos and it looks alot better 'in person.' :P

OK, dunno if I can think of 4, but here we go...

1. Kappa Crucis
2. Jewel Box
3. NGC 4755

Hmmm.....can't think of a 4th one right now...

with regards

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Yep- I was hoping I could get one of our northan hemishpere friends(It's really well know down here- It's one of my fav's too )

Anyway the 4th one is the cadwell number :wink: but you got the main ones .

It was hard to find a photo that it looked half decent in- I agree much better in person.

Anyway-

your up!

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Seen mecury venus and saturn yet?

Now's the time- get off the computer! :wink:

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Yeah I saw it a couple of nights ago, was gonna see it the other night when Mercury and Venus were close but it was raining.

I went outside a few minutes ago but the ground's too wet for me to bother gettin' my scope out, and there's too many trees on the Western side of my house to see anyway.

My question: Which comet had a tail that spanned about 320 million kilometres (ie. about the diameter of Earth's orbit)?

with regards

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Neat V1

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#-o Sorry - I didn't read your line, I was just leafing through the thread before starting work (so my solution was old but independent :wink: ).
What's next, Minbari?

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Close, very close, but no cigar! You're in the right area, but I need to hear two Latin words!