All (known) Bodies in our Solar System Larger than 200 Miles in Diameter (88 in all) - (pic)

kokogiak.com ^

[Alas Babylon!]

My thoughts completely! In fact, this scene just played in my mind:

Luke: “Look at him. He's headed for that small moon.”
Han: “I think I can get him before he gets there. He's almost in range.”
Obi-Wan: “That's no moon. It's a space station.”
Han: “It's too big to be a space station.”
Luke: “I have a very bad feeling about this.”
Obi-Wan: “Turn The ship around.”
Han: “Yeah, I think your right. Full reverse! Chewie, lock in the auxiliary power.”

[SunkenCiv]

Thanks LibWhacker.

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[SunkenCiv]

Thanks ltos!

[left that other site]

My Pleasure! :-)

[The Cajun]

Bookmark.

Great visual perspective of planetary, moons, etc. sizes.

[ronnie raygun]

No mention of the wookies ars?

[mikrofon]

When this Grand Conjunction occurs, KYAG ...

[Ernest_at_the_Beach]

Awesome...thanks fopr the posts and the ping!

[Marine_Uncle]

Brings back memories as a teenager, of building a six inch reflector telescope and then exploring our local space neighborhood.

[NormsRevenge]

is Oprah or Whorealdo’s heads on the list?

[LibWhacker]

Thanks! Great graphic. Snagged it and bookmarked it. Meant to reply yesterday, but at that time I was surfing on a 2nd generation Kindle and could barely make the pic out.

[LibWhacker]

Let's just use the Sun, since it is larger in volume than all the planets combined, with room to spare for all of the asteroid belt objects, Pluto (which is no longer classified as a planet), and probably much, if not all Oort Cloud objects. In other words, we'll be conservative (of course, hehe, what else on FR?) in our attempt to estimate the sparseness of matter in interplanetary space, never mind interstellar space or intergalactic space.

We should perhaps be looking at mass, not volume, since the amount of matter in a cubic foot of space at the center of Jupiter is much greater than the amount of matter in a cubic foot of Mars' dusty surface. In other words, by looking at volume alone, we're losing information about how much matter exists in these volumes, which was the original question.

Okay, so we want to look at this ratio:

r³ / R³ ,

since the (4/3)pi cancel, where r is the radius of the Sun and R the radius of the Oort Cloud from the Sun out to the Oort Cloud's outer edge.

Now, (r/R)³ = (430000 mi/ 20 x 10¹² mi)³

= 9.9 x 10^-24.

In other words, matter in the Solar System occupies only ten trillion-trillionths as much volume as empty space. Roughly speaking.

[MosesKnows]

Solar System occupies only ten trillion-trillionths as much volume as empty space

Thank you.

I believe the ratio supports my notion that space is essential empty.

[TigersEye]

I believe the ratio supports my notion that space is essential empty.

Now figure in the empty space in each atom of matter and you'll really see how empty it is.

[potlatch]

Interesting post, thanks so much for pinging Ernest! I haven't been here in awhile so am late responding.

I remember buying Telescopes for my kids, and then ‘many moons’ later buying them for grandkids. Everyone loves the mysteries of the sky.