astrofyzici 1 [vynechat] astrophysicists 1 [vynechat] cosmology 1 [vynechat] fyzici 1 [vynechat] kosmologie 1 [vynechat] physicists 1 [vynechat] space and time 1 [vynechat] teorie relativity 1 [vynechat] theory of relativity 1 [vynechat] universe 1 [vynechat] vesmír 1 [vynechat] časoprostor 1 [vynechat]