+----------------------+-----------------------------------------------+
| # Earth              | **H~2~O**                                     |
+----------------------+-----------------------------------------------+
| **Mars**             | **H~2~O**, CO~2~                              |
+----------------------+-----------------------------------------------+
| **Asteroids**        | **H~2~O** is seen in some asteroids, as is    |
|                      | ice with a C-H infrared signature             |
+----------------------+-----------------------------------------------+
| # Jupiter            |                                               |
+----------------------+-----------------------------------------------+
| Io                   | SO~2~, SO~3~, H~2~S?, H~2~O?                  |
+----------------------+-----------------------------------------------+
| Europa               | **H~2~O**, SO~2~, SH, CO~2~, O~2~, HC, XCN,   |
|                      | H~2~O~2~, H~2~SO~4~, carbonate salt, hydrous  |
|                      | sulfate                                       |
+----------------------+-----------------------------------------------+
| Ganymede             | **H~2~O**, SO~2~, SH, CO~2~, HC, XCN, O~2~,   |
|                      | O~3~, hydrated and hydroxylated minerals      |
+----------------------+-----------------------------------------------+
| Callisto             | **H~2~O**, SO~2~, SH, CO~2~, HC, XCN,         |
|                      | hydrated and hydroxylated minerals            |
+----------------------+-----------------------------------------------+
| # Saturn             |                                               |
+----------------------+-----------------------------------------------+
| Mimas                | **H~2~O**                                     |
+----------------------+-----------------------------------------------+
| Enceladus            | **H~2~O**                                     |
+----------------------+-----------------------------------------------+
| Tethys               | **H~2~O**                                     |
+----------------------+-----------------------------------------------+
| Dione                | **H~2~O**, C, HC, O~3~                        |
+----------------------+-----------------------------------------------+
| Rhea                 | **H~2~O**, HC?, O~3~                          |
+----------------------+-----------------------------------------------+
| Hyperion             | **H~2~O,** CO~2~, CN                          |
+----------------------+-----------------------------------------------+
| Iapetus              | **H~2~O**, C, HC, CO~2~, CN, H~2~S?           |
+----------------------+-----------------------------------------------+
| Phoebe               | **H~2~O**, CO~2~, CN, CH                      |
+----------------------+-----------------------------------------------+
| Titan                | H~2~O, C~2~(CN)~2~                            |
+----------------------+-----------------------------------------------+
| Rings                | **H~2~O**, HC?                                |
+----------------------+-----------------------------------------------+
| # Uranus             |                                               |
+----------------------+-----------------------------------------------+
| Miranda              | **H~2~O**, NH~3~ (NH~3~ hydrate?),            |
|                      | hydroxylated silicates                        |
+----------------------+-----------------------------------------------+
| Ariel                | **H~2~O**, CO~2~, OH?                         |
+----------------------+-----------------------------------------------+
| Umbriel              | **H~2~O**                                     |
+----------------------+-----------------------------------------------+
| Titania              | **H~2~O**, C, HC, OH?                         |
+----------------------+-----------------------------------------------+
| Oberon               | **H~2~O**, C, HC, OH?                         |
+----------------------+-----------------------------------------------+
| # Neptune            |                                               |
+----------------------+-----------------------------------------------+
| Triton               | N~2~, CH~4~, CO, CO~2~, H~2~O                 |
+----------------------+-----------------------------------------------+
| # Pluto              | N~2~, CH~4~, CO, H~2~O                        |
+----------------------+-----------------------------------------------+
| Charon               | **H~2~O**, NH~3~ (NH~3~ hydrate?)             |
+----------------------+-----------------------------------------------+
| #                    | **H~2~O** is seen on some Kuiper Belt         |
|  Kuiper Belt Objects | objects. Also identified are NH~3~, CH~4~,    |
|                      | and C~2~H~6~.                                 |
+----------------------+-----------------------------------------------+
| **Comets**           | **H~2~O** and a variety of coma (gas-phase)   |
|                      | molecules                                     |
+----------------------+-----------------------------------------------+

NOTES: HC = hydrocarbon of unknown composition; XCN = contribution from
a chemical species with a C-N triple bond; SH = contribution from a
chemical species with an S-H single bond

http://www-691.gsfc.nasa.gov/cosmic.ice.lab/ July, 2007