- Dream
- |
- Nov 07, 2020
Henry Spencer Quotes
Most Famous Henry Spencer Quotes of All Time!
We have created a collection of some of the best henry-spencer quotes so you can read and share anytime with your friends and family. Share our Top 10 Henry Spencer Quotes on Facebook, Twitter, and Pinterest.
- Last Updated on May 30, 2021
- Look
- |
- Nov 07, 2020
My one concern is that when money gets tight, it's easy to cut R&D funding that isn't tied to a specific project - look at what's happened to NASA's aviation research.
- More
- |
- Nov 07, 2020
Sure, there were hopes that Constellation's systems could later be adapted to support more ambitious goals. But Apollo had those hopes, too. It didn't work in 1970, and it wasn't going to work in 2020.
- Moon
- |
- Nov 07, 2020
Supplying fuel for a Mars expedition from the lunar surface is often suggested, but it's hard to make it pay off - Moon bases are expensive, and just buying more rockets to launch fuel from Earth is relatively cheap.
- Ground
- |
- Nov 07, 2020
The communications delays between Earth and Mars can be half an hour or more, so the people on the ground can't participate minute by minute in Mars surface activities.
- Moon
- |
- Nov 07, 2020
The Moon may not be quite as appealing as Mars, but it's still a complex and poorly understood world, with many questions still unanswered.
- Better
- |
- Nov 07, 2020
In 1960-61, a small group of female pilots went through many of the same medical tests as the Mercury astronauts and scored very well on them - in fact, better than some of the astronauts did.
- Never
- |
- Nov 07, 2020
NASA has never had a problem finding capable people to be astronauts. NASA's problem was, and still is, finding ways to cut the list of capable applicants down to a manageable length.
- Flying
- |
- Nov 07, 2020
Spaceflight, especially in the Mercury spacecraft, clearly wasn't going to be much like flying an airplane.
- First
- |
- Nov 07, 2020
Since SpaceX's very beginnings, they have talked about recovering and reusing at least the first stages of their rockets.
- Escape
- |
- Nov 07, 2020
The Orion capsule uses an escape system quite like that of the Apollo spacecraft in the 1960s and 70s: an 'escape tower' containing a solid-fuel rocket that will pull it up and away from Ares I in a pinch.
- Down
- |
- Nov 07, 2020
Solid-fuel rockets can't easily be shut down on command.
- Failure
- |
- Nov 07, 2020
Past experience, on the shuttle and the Titan rockets, suggests that large multi-segment solid rockets have a probability of failure of 0.5 to 1 per cent.
- Burn
- |
- Nov 07, 2020
Sometimes people wonder why aeroplanes are so cheap and rockets are so expensive. Even the most superficial comparison shows one obvious difference: aeroplane engines use outside air to burn their fuel, while rockets have to carry their own oxidisers along.
- Cheaper
- |
- Nov 07, 2020