Key technologies include a compact pre-cooler heat-exchanger that can take an incoming airstream of over 1,000C and cool it to -150C in less than 1/100th of a second. This would permit Sabre to use oxygen direct from the atmosphere for combustion instead of carrying it in a tank with the weight penalty that implies.
Source: co.uk
The space tourism startup Mars One has been called many things over the years, some more flattering than others. Though it’s had the opportunity to fold many times, and in spite of claims it’s scamming its own customers, the project with the stated goal of sending people to Mars has come up with bewildering new techniques to keep its charade afloat.
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Dark matter and galaxies normally go hand in hand. Dark matter seems to be needed to draw in sufficient material to form the galaxy and its stars, and halos of dark matter keep galaxies from spinning apart as they rotate. So scientists were more than a bit surprised to find a galaxy that has little to no dark matter at all.
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