North Korea fires intercontinental ballistic missile after threatening US

[muriel_volestrangler]

20. Sure, it was in space, by all usual definitions

That would be true of an ICBM on almost any trajectory (manned suborbital flights like Bezo's Blue Origin are counted as reaching 'space' when they get just 100 km up). But it's still subject to gravity at 6000 km - just not as much as at ground level (I've realised what was wrong with my calculations about height and time - I was using constant acceleration due to gravity, which works roughly just 100 km up (compared to the Earth's radius of 6370 km), but this almost doubled the distance from the centre of the earth, so the acceleration was almost quartered at the top of the trajectory).