Titania, Ariel, Umbriel, Miranda, 1985 U1. Red: Mars, Phobos, Deimos. Pink: Pluto, Charon. Blue (Neptune's moons): Triton, Nereid. Purple: Venus. Gold: Mercury. Green: Earth (cannot be purchased), Moon. Grey: Earth Research Lab, Neptune Research Lab, Uranus Research Lab, Venus Research Lab, Jupiter Research Lab, Saturn Research Lab. White: Solar Space Dock, Neptune Space Dock, Saturn Space Dock, Uranus Space Dock, Jupiter Space Dock. Fuel Players have to watch their fuel level carefully since getting stranded with no way to refuel means the loss of the game. Fuel is only used when leaving a planet or moon. According to the rules, "This occurs because the ship must escape the gravitational pull of the planet or moon." Thus, fuel is not used when leaving a manmade satellite or an empty space. It is always good to have spare fuel stations on hand. If a player runs out of fuel after landing on a planet that has no fuel station, they can force the sale of the property, build a fuel station, and replenish their fuel tank. Laser battles A suggested variation is that players who are close enough to each other can fire lasers. A roll of doubles damages the ship, allowing the aggressor to charge for repairs. A roll of double sixes completely destroys the opposing ship, knocking them out of the game. Red shift Basic Solarquest A Red Shift card is drawn when a player rolls doubles. For the Apollo 13 edition, redshift cards are only drawn when a one and a three are rolled, greatly reducing the amount of redshift cards drawn during gameplay. Rolling doubles allows for a second turn and a $100 Federon reward instead. These are similar to the Chance or Community Chest cards in Monopoly. The 36 Red Shift cards consist of: 25 cards directing the player to a specific destination (e.g. Advance to Federation Station II orbiting Jupiter – use 1 hydron of fuel) 3 cards in the Red Shift series (e.g. Red Shift 4 – Roll dice – Move 4 times the number rolled – use 4 hydrons of fuel) 5 cards awarding or taking away property (e.g. A player wins a dispute with the Federation League – choose any unowned property and assume ownership from the Federation) 3 miscellaneous cards (e.g. Discover new comet – Collect $400 (Roll Again)). Strategic Solarquest The rules also provide for an "Advanced Play" variant known as