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EFL B1 Upper D31
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Who realized the probability of a collision between two or more orbit?
former NASA scientist Donald Kessler in the 1970s
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How to prevent collisions according to UN?
countries shouldn't use old satellite for missile target practice
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What happened on Feb 10th, 2009?
a large communications satellite collided with another one, adding 200 pieces of space garbage.....
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What could shattered pieces of metal from a collision cause next?
more collisions until the space around the earth was full of pieces of metal
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What did people do after the collision in Feb, 2009?
An international conference about how to reduce objects in orbit took place
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What did scientists discuss at the conference?
how to get rid of old satellites and metal pieces
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How did UN support the world's space agencies? What was it about?
gave some sensible advice about collision prevention
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When do you use a satellite in daily life?
watch TV, make long- distance phone calls
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What would happen after a collision?
hundreds of small pieces of metal would be in the orbit instead of 2 large satellites
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What will happen to space garbage until a garbage collector satellite is launched?
remain a danger to travel in space
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