Mystery's Riddle 2 - Advanced Alien School

[Bronwyn]

Then I have seen that cipher somewhere else. I just can't remember where...

I guess I got c and f now, thanx for help =)

For g, I have to find english names for all those constellations?
(Strange, I'm sure I saw 4 constellations before, now I see only 3.)

[Mistery]

You have probably used it not so long ago in another riddle

Huh? There are 4 of them.

EDIT
Use the names from

[Bronwyn]

I'll try to find that cipher somewhere... And now I can see 4 constellations.

But now I really have to go!

[Mistery]

Okay, see you later, and good luck

[Bronwyn]

Oh, I still haven't found that cipher in 11e. It is a familiar cipher to me but I can't find it anywhere. And I really can't remember where I've seen it. If I just could remember its name...

[Mistery]

Work with the clues in the source

[Bronwyn]

Thank you so much! I finally got it =)

[Mistery]

Good job!

[Bronwyn]

And I'm at stage 12 =D
Thanx Mistery for all the help at 11 =)

[Mistery]

Wow, great job!!!

[Bronwyn]

I thought to know what's 14 about. But I guess I was wrong as my answer didn't work.

Nm, I got it. =)

[Mistery]

Glad you figured it out

[Bronwyn]

But now I need help at 17. I translated the text but I'm still not sure what is needed here as answer...

[Mistery]

PM me what you got so far

[Bronwyn]

At 20. So close to finish, but I really have to go now. I'll try to find time to solve it at work, though...