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The Scratch patch - substitution cipher

This project, exploring basic encryption, is a useful introduction to data security as well as iterating through strings to manipulate them. The program create a ‘substitution cipher’, one of the most basic forms of encryption. It also demonstrates that, for more complex chained commands, Scratch becomes rather...

The Scratch patch - error handling

This activity is an introduction to writing programs that can handle errors. It also helps students to understand number bases, by guiding them through the writing of a ‘base converter’ program.

space:uk - Summer 2015, Issue 43

This edition of the magazine from the UK Space Agency includes:

  • The launch of the Earth Observation satellite, Sentinel 2A
  • News about the Rocket (salad) Science experiment
  • Tim Peake's training for his mission to the International Space Station
  • The launch of the International...

space:uk - Spring 2015, Issue 42

This edition of the magazine, from the UK Space Agency includes:

  • The discovery Beagle 2 on Mars
  • The AstroPi code competition
  • The landing of Philae on comet 67P in pictures
  • The UK's new funding for space programmes
  • British built space technology
  • The healthcare...

Launching a Balloon to the Edge of Space

The STEM club from Holy Cross School in Chorley and the North West Local Centre of the Royal Meteorological Society collaborated on a project to launch a balloon into the atmosphere. The balloon was carrying a camera, a GPS transmitter and a radiosonde, an instrument which transmits measurements by radio waves back...

Gardens in the Sky

This Catalyst article investigates how plants can be grown in orbiting spacecraft and how this may be useful in future manned space missions.

The article is from Catalyst: Secondary Science Review 2014, Volume 25, Issue 3.

Catalyst is a...

Exploring Saturn

A Catalyst article following the journey of the space probes Huygens and Cassini, sent to explore Titan, a moon of Saturn. After a seven year journey Huygens was set to fall through the atmosphere transmitting data back to Earth via Cassini so more can be learnt about this distant moon. The article describes the...

Designs on Space: the Lifecycle of a Satellite

A Catalyst article about designing, building and testing a spacecraft. There are thousands of man-made satellites orbiting the Earth. Some are only a few hundred kilometres above the Earth and complete one orbit roughly every 90 minutes. Geostationary satellites are located around 40 000 kilometres from the surface...

CS4FN Issue 8

This issue of Computer Science for Fun is entitled ‘Computer Science in Space’, and explores the role of computers in space exploration and astronomy.

It includes articles covering:

• Computer scientists working for NASA

• GPS and computer art projects that love your data

• Computers,...

Balloons in Space

The Big Picture on pages 10-11 of this issue of Catalyst shows scientists in Antarctica launching a balloon which will travel up through the atmosphere to a height of 34 km above the Earth’s surface. This balloon is part of NASA’s BARREL mission, probing the radiation belts which surround the Earth.

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