[dworth]

Some more:

- If you're out in space and encounter an alien ship, the crew inside it will be good enough to fly it the same way up as your ship.

- Societies with a technological level that allows them to literally manufacture anything they want out of thin air will still have money and trade.

- If a ship runs out of fuel, it stops.

- Battles never take place between ships that are more than a few hundred metres apart.

- Most planets are Earth-like with similar vegetation and climate, except for the ones that look like gravel pits or are covered in collections of unconvincing rocks. Planets without breathable atmospheres are rarely encountered.

- Planets will usually have more than one moon, probably much, much larger than our own. If they don't they will be in close orbit around a large and spectacular gas giant planet. Strangely this will have no ill effects on the environment, such as: massive tidal forces, or lethal dosages of radiation in the case of the latter.

- Asteroid fields are composed of tightly packed, rapidly spinning rocks that are continually smashing into one another. (they aren't)

- All objects in space make a noise. Big spaceships make a low rumbling sound when passing by, as do big asteroids and comets (you even come across the latter in documentaries).

- Light travels instantaneously, as do the blast waves (see below) from big explosions. If the sun blows up millions of kilometres away, you will see it as it happens and then be hit by the blast seconds later.

- Explosions in a vacuum cause compression waves, as if they were taking place in an atmosphere.