world focus magazine Published this article page no 124 In the wind o The spacecrafts weather sensors have detected thousands of passing whirlwinds which are called dust devils when they pick up grit and become visible. o SEIS feels these whirlwinds pulling on the surface like a giant vacuum cleaner. o These whirlwinds will help in subsurface seismic exploration over planet Mars. VOYAGER2 Why in news? Recently the NASA fixed a glitch in its Voyager2 probe. More on news Voyager 2 is now 11.5 billion miles from the Earth and at that distance light takes 17 hours to r each it or for messages from it to reach mission control on Earth. About Voyager 2 The twospacecraft Voyager1 and Voyager2 missions were designed to replace original plans for a Grand Tour of the planets that would have used four highly complex spacecraft to explore the five outer planets during the late 1970s. Like Voyager 1 Voyager 2 also was designed to find and study the edge of our solar system. Voyager gets its power from a radioisotope thermoelectric generator (RTG) which turns heat from the decay of a radioactive material into electricity. o Because of the way it uses the decay of the material the power budget for the craft drops by about four watts per year world focus magazine buy.
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