A former NASA scientist explains how we know whether Blue Origin New Shepard made it to space, and how its altitude compares ...

A few more stars are entering the stratosphere as Blue Origin's all-female, celebrity-studded space flight takes flight.

Pop star Katy Perry and journalist Gayle King were among six women who traveled aboard Jeff Bezos-founded Blue Origin’s all-female, suborbital space tourism mission, which lifted off Monday.