Pluto

Pluto was until 2006 a planet, but now is just a dwarf planet. The main reason for this change was that Pluto has only one sixth mass of our Moon and croses the orbit of Neptune. A curious fact is, that Pluto's moon Charon is very large – its mass is about 12 % of Pluto. For comparisson, Moon's mass is only 1.2 % of Earth's.

• more on wikipedia, source of the data is wikidata

In our scale, Pluto is 5.1mm in diameter (the top of Lego), Charon is 2.6mm (the ball at the end of the antena) and they are 4.4 cm apart (six lego cubes). This lego model represents rotations accurately – Pluto and Charon rotate aroud a common point between them (close to Pluto, around 2.6mm from Pluto's centre in our scale) and they are tidaly locked (so rotation of Pluto and Charon around their axis is accurate in this model). The whole model is tilted by 122 degrees.

Pluto has 5 moons, the most significant is Charon.

Moons of Pluto

		Charon
Distance from the Pluto	real	19 591 km
	in scale	42.22 mm
	light from Pluto reaches in	0.1 s
Diameter	real	1 212 km
	as a multiple of our Moon	0.35 x
	in scale	2.61 mm
Orbit period	around Pluto	6.4 days
Movement in a day	degrees	56.4 °
	in our scale	42 mm
Mass	real	1.520*1021 kg
	in scale	0.0152 g
	as a multiple of our Moon	0.0207x

The other four moons are:

		Styx	Nix	Kerberos	Hydra
Distance from the Pluto	real	42 656 km	48 694 km	59 000 km	64 749 km
	in scale	9.19 cm	10.49 cm	12.72 cm	13.95 cm
	light from Pluto reaches in	0.1 s	0.2 s	0.2 s	0.2 s
Diameter	real	18 km	93 km	29 km	115 km
	as a multiple of our Moon	0.01 x	0.03 x	0.01 x	0.03 x
	in scale	0.04 mm	0.20 mm	0.06 mm	0.25 mm
Orbit period	around Pluto	20.2 days	24.9 days	32.2 days	38.2 days
Movement in a day	degrees	17.9 °	14.5 °	11.2 °	9.4 °
	in our scale	29 mm	27 mm	25 mm	23 mm
Mass	real	7.500*1015 kg		1.650*1016 kg	5.000*1016 kg
	in scale	0.0000000751 g		0.000000165 g	0.000000501 g
	as a multiple of our Moon	0.000000102x		0.000000225x	0.000000680x

Kuiper belt

Kuiper belt is 30 to 50 AU from the Sun.. . .

Similar articles:

Makemake, Kuiper belt