XKCD "WHAT IF" is generally awesome, but today was particularly awesome for those of us who like math and like The Proclaimers and think space is really cool... so me.

XKCD "WHAT IF" is generally awesome, but today was particularly awesome for those of us who like math and like The Proclaimers and think space is really cool... so me.

This streak is the last image ever of the space shuttle's reentry into earth's atmosphere from orbit.

This streak is the last image ever of the space shuttle's reentry into earth's atmosphere from orbit.

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animated! universlingsforscienceandreason:  Solar System in Motion.
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Predicted appearance of non-rotating black hole with toroidal ring of ionised matter, such as has been proposed[8] as a model for Sagittarius A*. The asymmetry is due to the Doppler effect resulting from the enormous orbital speed needed for centrifugal balance of the very strong gravitational attraction of the hole.

Predicted appearance of non-rotating black hole with toroidal ring of ionised matter, such as has been proposed[8] as a model for Sagittarius A*. The asymmetry is due to the Doppler effect resulting from the enormous orbital speed needed for centrifugal balance of the very strong gravitational attraction of the hole.

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All rights go to ......    http://www.education.com/science-fair/article/centripetal
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Science Junkie  Kepler’s second law: the orbital speed changes regularly as the distance from the Sun changes, meaning that when the planet is far away from the Sun, it does not move as fast as when it is close to the Sun (The Law of Areas). This implied that whatever force was moving the planet weakened with distance, and this led to the realization of what became Kepler’s first law: that the planets move in an ellipse:  Scienc-junkie.tumblr.com

Science Junkie Kepler’s second law: the orbital speed changes regularly as the distance from the Sun changes, meaning that when the planet is far away from the Sun, it does not move as fast as when it is close to the Sun (The Law of Areas). This implied that whatever force was moving the planet weakened with distance, and this led to the realization of what became Kepler’s first law: that the planets move in an ellipse: Scienc-junkie.tumblr.com

Redstone-Mercury: yes, Shepard and Grissom rode that tiny thing into space. Couldn't even reach orbital speed.

Redstone-Mercury: yes, Shepard and Grissom rode that tiny thing into space. Couldn't even reach orbital speed.

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