What is this thing called gravity?

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Parabolic Flight, an illustration<br>by Helen Gavaghan

From a carousel of seven images of science concepts
by science writer, Helen Gavaghan. Each image displays for 8 seconds.

Here I am imagining the force needed to propel a body upward, against the force of gravity. The white image in the centre is the astronaut, experiencing the mind-expanding sense of weightlessness as free-fall is attained within the safe environment of an orbiting spacecraft. My mind's imagining captured the moment before releasing the safety harness worn during launch.

Description of illustration © by Helen Gavaghan added 17th July, 2017.

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