I wish them best of luck, but am more optimistic about Paul Allen's Stratolaunch system: https://www.stratolaunch.com/2018/08/20/stratolaunch-announces-new-laun

I wish them best of luck, but am more optimistic about Paul Allen's Stratolaunch system: https://www.stratolaunch.com/2018/08/20/stratolaunch-announces-new-launch-vehicles/ https://www.stratolaunch.com/2018/08/20/stratolaunch-announc... They hope to orbit a 370kg payload in 2020. That mass seems almost sufficient to send up a human. Could we build a 300kg capsule to carry a 70kg human payload, a few hours of air and power, parachute, heatshield, and enough thrust to de-orbit (with less than 5-7G of acceleration)? Stratolaunch is using a Pegasus rocket https://en.wikipedia.org/wiki/Pegasus_(rocket) https://en.wikipedia.org/wiki/Pegasus_(rocket), which is obviously not rated for human spaceflight, but rich "explorers" might be interested.