## The Rosetta Project … like throwing a dart from Sydney to Perth and hitting the bullseye

November 28, 2014

Many commentators in Australia claimed that the Philae landing was:

This is equivalent to hitting the bullseye of a dartboard in Perth from Sydney. With a billion euro (\$1.4bn) dart. While blindfolded (as the mission was powered down for almost the entire journey). ABC The Drum

# Did they get the maths right?

Inner bullseye of dartboard = 12.7 mm

67P comet = 4.1 km = 4,100 m at widest point

Distance comet from earth = 520 million km

Actually, hitting the 67P comment was more like roulette as the Rosetta mothership swung into orbit. And, as the earth and the comet are moving, the distance constantly changes, but you can watch the distance changing here.

Fabulous Graphics from the Daily Telegraph

# In the Dart Throwers Universe

We will assume someone can stand on earth and throw a dart at the comet … Yes! They would need very big triceps.

So the commentators aren’t even close. It would still be a feat hitting a bullseye with a dart from 160km, but that would be from Sydney to, um, Nowra on the coast.

# WHY?

The distance from Sydney to Perth is 4100 km. At best the commentators would be talking about throwing a dart from Brisbane to Adelaide is 2044km (below).

## 3. How far can a bio-fuel Mini drive on 1 kg of human fat?

September 30, 2014

# ENERGY:

## Outdoor Maths Adventures: Grade 3 – 5

June 30, 2014

This fab idea comes from Juliet Robertson, an outdoor education consultant in Scotland. Her blog Creative star learning is one of the most inspiring outdoor maths blogs you will find.

Check out Mathpig’s protractor joke here.

Another fab idea from Juliet Robertson.

## 2. Make a 3D Mini Me

October 24, 2013

### Now you too can play games with yourself. (Warning: Avoid wording involving ‘play with’ and ‘yourself’.)

It takes two minutes using a hand-held scanner to create the 3D image and 6 – 8 hours for the 3D printer to produce the figure.

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# The Virtual You

### 3D body scanning already exists so you can create a 1:1 scale avatar (A Mevatar, perhaps?) of youself for online shopping. By combining this technology with 3D printing the scaled-down Mini Me concept was born.

YOu can walk your personal exact-scale Avatar into an online shop and try on clothes!

# Wait a minute:

1:10 scale along each axis produces an overall scale of 1:1,000

### or one little cube in the pack of 1,000.

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April 9, 2013

# Wrangle an Orderly Tangle

## Lego Olympics Flags

February 23, 2012

### The Lego Marching band is rehearsing for the Opening ceremony.

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### Hula Lula (Grinmania)

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# A. National Flag of  Comotosia

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### How will you do this? (Hint below)

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