A few years later I returned to the ISS, this time on a Russian Soyuz. My spaceflight career began on the space shuttle Endeavour, as the pilot of STS-130, and we delivered the final two modules of the space station assembly sequence in 2010. If you buy something using links in our stories, we may earn a commission. The amount of delta-v required for this trick is much less than for changing your inclination. Conversely, speeding up makes your orbit climb. Here’s where the useful trick comes in handy-if you slow down, your orbit will descend. The good news is that we don’t have to move left or right to come back to Earth, we just need to go down. Most human spacecraft carry only enough rocket fuel to change their heading by a few tenths of a degree to the left or right. Because of this, it’s very inefficient to change your inclination, or heading. Orbital mechanics are what determine a spacecraft’s motion once in space, and to change your course to the left or right you need a tremendous amount of delta-v, or change in speed. However, in space we have Sir Isaac Newton to thank for a very useful trick that allows astronauts to come home. Pull back on the stick and the trees get smaller. Changing your flight path angle in an airplane is a relatively easy thing you push forward on the stick and the air pressure on the elevator moves the nose of the airplane down and the trees get bigger. Next is withstanding the tremendous temperatures of reentry. The most obvious is changing its flight path to bend down toward the atmosphere, where the air drag will capture it and bring it relentlessly down to the surface. There are several key things that every spaceship has to do if it wants to leave orbit and come back to Earth.
#We need to go deeper crashing how to
This story is adapted from How to Astronaut: An Insider’s Guide to Leaving Planet Earth, by Terry Virts.
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