Wanderlust World Wanderlust World Explanations:
The O2 Arena is not the largest concert arena in the world, but one of the busiest, hosting around 2 million visitors a year. It is 365 meters in diameter and has a height of 55 meters.
Space telescopes typically orbit somewhere around 100 to 100,000 km above the ground, from around which, objects larger than 50 to 100 meters can be resolved to the naked eye; however, at low orbit (~150 km) a 50 meter object would have an angular diameter of around 0.00174 degrees, which would mean it would take up around one fifth of a millionth of the total amount of sky visible to a given satellite; in practical terms, that means such an object could not be resolved directly and might only be seen as an artifact in longer exposure shots when several orbits are combined, particularly as it is unlikely that the satellite would be aligned with the arena directly.