The countdown is on for an all-female crew, headlined by singer Katy Perry, to blast off to space on a Blue Origin rocket.

A crew of six women, including Katy Perry and Gayle King, will take part in the latest launch for Jeff Bezos's space tourism ...

Among the observatory missions above, similar technical route is adopted. The gravitational wave observatory under design consists of three spacecraft that form an equilateral triangle with an arm ...