I found this in Appearance.xml
<Object>
<Name>Spacecraft</Name>
<Type>Craft</Type>
<ColorReal>Gray</ColorReal>
<ColorVivid>Yellow</ColorVivid>
</Object>
Also I found all of these in earthobjects.xml
<Object>
<Name>coffee bean</Name>
<Diameter>12 mm</Diameter>
<Type>Object</Type>
<Notes>12x8 mm</Notes>
</Object>
<Object>
<Name>Grain of Rice</Name>
<Diameter>8 mm</Diameter>
<Type>Object</Type>
<Notes>8x2.5 mm</Notes>
</Object>
<Object>
<Name>Sesame Seed</Name>
<Diameter>3 mm</Diameter>
<Type>Object</Type>
<Notes>3x2 mm</Notes>
</Object>
<Object>
<Name>grain of salt</Name>
<Diameter>.5 mm</Diameter>
<Type>Object</Type>
<Mass>1.08 mg</Mass>
<Notes>mass in grams = 5x10^-4 * 2.16</Notes>
</Object>
<Object>
<Name>amoeba proteus</Name>
<Diameter>500 µm</Diameter>
<Type>Object</Type>
</Object>
<Object>
<Name>paramecium</Name>
<Diameter>210 µm</Diameter>
<Type>Object</Type>
<Notes>210x60 µm</Notes>
</Object>
<Object>
<Name>human egg</Name>
<Diameter>130 µm</Diameter>
<Type>Object</Type>
</Object>
<Object>
<Name>sperm</Name>
<Diameter>5 µm</Diameter>
<Type>Object</Type>
<Notes>60x5 µm</Notes>
</Object>
<Object>
<Name>skin cell</Name>
<Diameter>30 µm</Diameter>
<Type>Object</Type>
</Object>
<Object>
<Name>photoreceptor rod</Name>
<Diameter>100 µm</Diameter>
<Type>Object</Type>
<Notes>2.5x100 µm</Notes>
</Object>
<Object>
<Name>red blood cell</Name>
<Diameter>8 µm</Diameter>
<Type>Object</Type>
</Object>
<Object>
<Name>X chromosome</Name>
<Diameter>7 µm</Diameter>
<Type>Object</Type>
</Object>
<Object>
<Name>baker's yeast</Name>
<Diameter>4 µm</Diameter>
<Type>Object</Type>
<Notes>3x4 µm</Notes>
</Object>
<Object>
<Name>mitochondrion</Name>
<Diameter>4 µm</Diameter>
<Type>Object</Type>
<Notes>4x0.8 µm</Notes>
</Object>
<Object>
<Name>lysosome</Name>
<Diameter>1 µm</Diameter>
<Type>Object</Type>
</Object>
<Object>
<Name>E. coli bacterium</Name>
<Diameter>3 µm</Diameter>
<Type>Object</Type>
<Notes>3x0.6 µm</Notes>
</Object>
<Object>
<Name>measles virus</Name>
<Diameter>220 nm</Diameter>
<Type>Object</Type>
</Object>
<Object>
<Name>hiv</Name>
<Diameter>130 nm</Diameter>
<Type>Object</Type>
</Object>
<Object>
<Name>influenza virus</Name>
<Diameter>130 nm</Diameter>
<Type>Object</Type>
</Object>
<Object>
<Name>phage (bacteria virus)</Name>
<Diameter>200 nm</Diameter>
<Type>Object</Type>
<Notes>70x200 nm</Notes>
</Object>
<Object>
<Name>coated vesicle</Name>
<Diameter>90 nm</Diameter>
<Type>Object</Type>
</Object>
<Object>
<Name>hepatitis virus</Name>
<Diameter>45 nm</Diameter>
<Type>Object</Type>
</Object>
<Object>
<Name>rhinovirus</Name>
<Diameter>30 nm</Diameter>
<Type>Object</Type>
</Object>
<Object>
<Name>ribosome</Name>
<Diameter>30 nm</Diameter>
<Type>Object</Type>
</Object>
<Object>
<Name>antibody</Name>
<Diameter>12 nm</Diameter>
<Type>Object</Type>
</Object>
<Object>
<Name>tRNA</Name>
<Diameter>7 nm</Diameter>
<Type>Object</Type>
</Object>
<Object>
<Name>hemoglobin</Name>
<Diameter>6.5 nm</Diameter>
<Type>Object</Type>
</Object>
<Object>
<Name>phospholipid</Name>
<Diameter>3.4 nm</Diameter>
<Type>Object</Type>
<Notes>.9x3.4 nm</Notes>
</Object>
<Object>
<Name>glucose</Name>
<Diameter>900 pm</Diameter>
<Type>Object</Type>
</Object>
<Object>
<Name>methionine (an amino acid)</Name>
<Diameter>1100 pm</Diameter>
<Type>Object</Type>
<Notes>1100x700 pm</Notes>
</Object>
<Object>
<Name>adenine</Name>
<Diameter>1300 pm</Diameter>
<Type>Object</Type>
<Notes>1300x760 pm</Notes>
</Object>
<Object>
<Name>water molecule</Name>
<Diameter>275 pm</Diameter>
<Type>Object</Type>
</Object>
<Object>
<Name>carbon atom</Name>
<Diameter>340 pm</Diameter>
<Type>Object</Type>
</Object>
<Object>
<Name>hydrogen atom</Name>
<Diameter>100 pm</Diameter>
<Type>Object</Type>
</Object>
<Object>
<Name>proton</Name>
<Mass>1.672621637*10^-27 kg</Mass>
<Diameter>.001 pm</Diameter>
<Type>Object</Type>
</Object>
<Object>
<Name>neutron</Name>
<Mass>1.67492729*10^-27 kg</Mass>
<Diameter>.001 pm</Diameter>
<Type>Object</Type>
</Object>
<Object>
<Name>electron</Name>
<Mass>9.10938215*10^-31 kg</Mass>
<Diameter>1*10^-6 pm</Diameter>
<Type>Object</Type>
</Object>
<Object>
<Name>up quark</Name>
<Diameter>1*10^-6 pm</Diameter>
<Type>Object</Type>
</Object>
<Object>
<Name>down quark</Name>
<Diameter>1*10^-6 pm</Diameter>
<Type>Object</Type>
</Object>
How do I use them?