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Structures & Material
Gravity & Air
Understanding the basics—gravity and air—is key. To rise above it all, you have to face some facts: You must grapple…
Gravity Keeps Us Down to Earth
WHAT IS GRAVITY? Gravity holds us to the surface of the Earth and keeps our atmosphere wrapped around our planet.…
Shaped for Space
HOW DOES SPACE AFFECT STRUCTURE? If a spacecraft flies only in space and not through an atmosphere, it does not…
