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#### Pictures of Slam Dunk Festival South in Hatfield Park | Music - Welwyn Hatfield Times

An astroid is a particular mathematical curve: a hypocycloid with four cusps. Specifically, it is the locus of a point on a circle as it rolls inside a fixed circle with four times the radius. By double generation, it is also the locus of a point on a circle as it rolls inside a fixed circle with 4/3 times the radius. It can also be defined as the envelope of a line segment with an end point on each of the axes. It is therefore the envelope of the moving bar in the Trammel of Archimedes.

Astroid
The hypocycloid construction of the astroid.
Astroid as the common envelope of a family of traced ellipses, where a + b = const.

An astroid is a particular mathematical curve: a hypocycloid with four cusps. Specifically, it is the locus of a point on a circle as it rolls inside a fixed circle with four times the radius. By double generation, it is also the locus of a point on a circle as it rolls inside a fixed circle with 4/3 times the radius. It can also be defined as the envelope of a line segment with an end point on each of the axes. It is therefore the envelope of the moving bar in the Trammel of Archimedes.

Its modern name comes from the Greek word for "star". The curve had a variety of names, including tetracuspid (still used), cubocycloid, and paracycle. It is nearly identical in form to the evolute of an ellipse.

### The end of Earth 2029. The massive Astroid hits Earth in 2029

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### NASA Plans To Deliberately Crash DART Spacecraft Into An Astroid

Large asteroids colliding with Earth is extremely rare. However, if that happens, it could mean the end of civilization as we know it. NASA isn't taking any ...

### Astroid Simulation

Speculation of how devastating an asteroid would be if it were to hit the earth, pretty amazing information too!

### Recreating Astroid Strike That Killed Dinosaurs | Strip The Cosmos

The dinosaurs died off after a massive asteroid strike with a billion times more energy than the atomic bombs dropped on Hiroshima. A team at NASA studies the ...

### 2009 ES ASTROID

Hey guys sorry for not uploading in a while. I've been real busy. Here is just some news that I thought would be scary to share. See you soon! Sorry there is no ...

### POKEMON OMEGA RUBY AND PLATINUM CO-OP SLEEPLOCKE PART 2!!

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