The gravity-bending story of Nasa's ingenious space pen

50 years after it made its first flight, the Space Pen is still helping astronauts write in zero gravity

Did NASA Spend Millions to Make the Space Pen? Here's How Astronauts Write While in a Low-Gravity Environment

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If light follows the curvature of space-time. What happens to the light from the sun that is pulled into Earth's space-time vortex? - Quora

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Why can space bend, expand and shrink in the general relativity universe? Is it a way to explain gravity? Do other factors also affect space? - Quora

Did NASA Spend Millions to Make the Space Pen? Here's How Astronauts Write While in a Low-Gravity Environment