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Since this question marathon has been inactive for a while, I will continue it...
What satellite isthe largest satellite in our Solar System and what planet does it orbit?
Also, what year did it get discovered?

AstroRockShock wrote:Since this question marathon has been inactive for a while, I will continue it...
What satellite isthe largest satellite in our Solar System and what planet does it orbit?
Also, what year did it get discovered?

Ganymede, Jupiter, and Im not too sure, so I'll go with 1612.

ckssv07 wrote:

AstroRockShock wrote:Since this question marathon has been inactive for a while, I will continue it...
What satellite isthe largest satellite in our Solar System and what planet does it orbit?
Also, what year did it get discovered?

Ganymede, Jupiter, and Im not too sure, so I'll go with 1612.

You were pretty close with the year, it is 1610.
Other than that all correct!
I suppose it is your turn now.

What "object" generally signifies the boundary of our solar system and why.

Sedna, it is one of the only confirmed members of the oort cloud.

mrburrito wrote:Sedna, it is one of the only confirmed members of the oort cloud.

I was going for the Oort Cloud, but that works also. Your turn.

What do the terms Aphelion and Perihelion mean?

mrburrito wrote:What do the terms Aphelion and Perihelion mean?

If I am not mistaken, the aphelion is the point in an objects orbit where it is the farthest away from the object it is orbiting, while the perihelion is the closest.

ckssv07 wrote:What is the density of Saturn. Isn't the tallest Olympus Mons

Unless my eyes skipped over it, no one else has answered ckssv's question. I believe the density of Saturn is around .69 g/cm^3.

Next question: Which moon is this? And of which planet is the moon?



Extra points if you know what book/movie the moon famously appears in! (Though this, as far as I know, has very little to do with the Solar System challenge)

crypten wrote:

ckssv07 wrote:What is the density of Saturn. Isn't the tallest Olympus Mons

Unless my eyes skipped over it, no one else has answered ckssv's question. I believe the density of Saturn is around .69 g/cm^3.

Yeah it's usually around .7, but mrburrito still has to give us the official answer to the question I answered.