Mr Lemmens said that future spacecraft "should be designed in such a way that they can take themselves out of orbit safely, preferably by doing controlled re-entries".
Border Points: Each cluster has a limited number of defined "border points" – these are the gateways in and out of the cluster.
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Мощный удар Израиля по Ирану попал на видео09:41
Artist uses factory waste to create sculptures
Израиль нанес удар по Ирану09:28