Solar Energy

Day 4 - December 3

Space Project 2000 - Day 4 - Solar Energy

Today, Joseph Tanner and Carlos Noriega, two American astronauts, perform the first of three space walks. They will be working very hard to install P6 to the International Space Station (ISS) (see day 3 for more information). Once the structure is in place, they will hook up the cables, which will be providing the main electrical current to the Station. Measuring 70 metres (m) wide and 10 m long, the solar panels will be deployed by Marc Garneau with help from... his portable computer! It takes 15 minutes (min) for each panel to be deployed; once they are installed, they will be ready to provide the Station with its first 18 kilowatts (kW) of electricity. Yeah!

During the space walks or "extravehicular activities" (EVAs), Marc will guide the astronauts from his post within the shuttle - a task called "intravehicular activity" (IVA). His duties include the co-ordination of the space walks, helping the astronauts who are performing the EVAs to keep their heads, as well as making sure that nothing is forgotten. "I will remind them where to go, what to do, which tools to use and when they must come in," adds Marc. He is also EVA back up, in case one of his colleagues is unable to perform all the work needed.

Questions / Answers

Also available: The list of all questions of the Space 2000 Project

Mission: Sun Contest

Question:

What does the expression "light-year" mean?

Answer :

It's a way of measuring distance in space. A light-year is the distance light travels in space in one year – approximately 9,461,000,000,000 kilometres (km)! Wow!

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