Quotes by : Henry Spencer

In 1960-61, a small group of female pilots went through many of the same medical tests as the Mercury....

Reusable rockets promise much easier testing because you should usually get them back, and you can debug....

Whether solid rockets are more or less likely to fail than liquid-fuel rockets is debatable. More serious,....

Sometimes people wonder why aeroplanes are so cheap and rockets are so expensive. Even the most superficial....

The Orion capsule uses an escape system quite like that of the Apollo spacecraft in the 1960s and 70s:....

Progress requires setbacks the only sure way to avoid failure is not to try.

Supplying fuel for a Mars expedition from the lunar surface is often suggested, but it's hard to make....