Near-record Number of Astronaut Applicants (Infographic)
The 2013 group is second only to the 1978 batch of hopefuls. Only a tiny percentage of applicants are selected to become astronauts.
They're the ultimate spacecraft: they launch into orbit and land on the Earth like an airplane. Meet the space planes. https://futurism.com/images/there-and-back-again-a-timeline-of-space-planes-infographic/?utm_campaign=coschedule&utm_source=pinterest&utm_medium=Futurism&utm_content=There%20And%20Back%20Again%3A%20A%20Timeline%20of%20Space%20Planes%20%5BINFOGRAPHIC%5D
Escala Kardashev de civilizaciones avanzadas
International Space Station cutaway
Black hole? Or wormhole in disguise? | CosmOnline::