Brains On! Science podcast for kids The mystery of gravity
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Jan 9, 2015 Learn about the mystery of gravity, including its origins and connection to black holes. Listen to a NASA astronaut describe the feeling of floating in microgravity and the challenges of living in space.
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Astronaut's Space Experience
- NASA astronaut Richard Arnold describes the intense acceleration to space followed by the sensation of free floating.
- He explains living on the International Space Station involves floating in any orientation and managing personal items that drift away easily.
Microgravity Explained
- Astronauts in orbit experience microgravity, not zero gravity, as Earth's gravity still affects them.
- This microgravity feeling arises because they are in free fall around Earth, continuously falling over the horizon but never hitting it.
Gravity's Unknown Origin
- Gravity is created by mass; Earth and other planets have gravity because of their mass.
- Scientists still do not know the fundamental origin of gravity despite understanding its effects well.