Virgin territory Options

[jasedm]

As of today, we have photographs and maps of many of the surfaces of the larger solid bodies of the solar system (including two shrouded in dense atmospheres) I was wondering what are the largest expanses of unknown terrain (by this I mean not imaged at a resolution better than 15km or so) remaining in the solar system today, and came up with the following.

The figures are inevitably approximate, are in square kilometres and I'm ignoring our own planet's ocean-floors.

Mercury (the 30-ish% not photographed by Mariner or radar-imaged from Arecibo) - 22,500,000
Pluto/Charon - 21,310,000
Titan (the remaining 25-ish% not yet imaged from Cassini) - 20,825,000
Eris - (dwarf planet/TNO) - 18,100,000
Neptune system (~half of Triton plus Proteus and Nereid) - 13,600,000
Uranus system (Over half of each of the moons Miranda through Oberon) - 13,400,000
Jupiter system (pole areas of the galileans) 11,600,000
2005fy9 - (TNO) - 10,200,000
2003el61 - (TNO) - 6,970,000
Sedna - (TNO) - 6,970,000
Quaoar - (TNO) - 4,990,000
Ceres/Vesta - 3,722,000 (I've lumped these together for obvious reasons)

For comparison, these add up to just over the dry-land surface of Earth (which is 148,940,000 square km)

Incidentally, pre-Cassini, Titan alone comes out at 83,300,000 square km

Interesting to note that the top three will have been imaged at good or very good resolution in the next ten to fifteen years.
We may get a mission each to Uranus and Neptune in my lifetime, but I don't expect my children will get to see what Eris looks like up-close in theirs.

[jasedm]

Apologies for resurrecting an archaic thread, but I felt it was apposite to update this one as a huge amount has been achieved in the intervening 14 years.

/Nerd alert/

To recap, these are areas of various bodies not yet imaged at better than 15km resolution in our solar system. The figures are inevitably approximate, are in square kilometres and I'm ignoring our own planet's ocean-floors.

Mercury - Messenger achieved 100% mapping in 2013
Pluto/Charon - I'm guessing perhaps half of Pluto/Charon was imaged at 15km resolution or better, leaving 10,600,000
Titan - Perhaps 10% not imaged by Cassini-Huygens at that resolution? - 8,300,000
Eris - (dwarf planet/TNO) - 18,100,000
Neptune system (~half of Triton plus Proteus and Nereid) - 13,600,000
Uranus system (Over half of each of the moons Miranda through Oberon) - 13,400,000
Jupiter system (pole areas of the Galileans) 11,600,000
2005fy9 - Now named Makemake - 10,200,000
2003el61 - Now name Haumea - 6,970,000
Sedna - 6,970,000
Quaoar - 4,990,000

Ignoring everything outside of Pluto's orbit, these add up to 57,500,000 - roughly equivalent to the area of Asia and Europe.

Two missions to the Jupiter system (Europa Clipper and Juice) should improve on Galilean coverage in the next 15 years and we've had a few bonuses as well (several comets, and parts of the moons of Pluto)

It would be amazing to have Cassini-type missions to the Uranus and Neptune systems (Radar-equipped at Uranus because of the axial tilt) and this would give us coverage of half the remaining total.

Jase

[stevesliva]

Ignoring everything outside of Pluto's orbit, these add up to 57,500,000 - roughly equivalent to the area of Asia and Europe.

Which is pretty cool!

On the other hand, the fractal nature of things for small bodies means you'll never see it all if you make the scale small enough.