Looking for alien life – level 1
Stephen Hawking is a physicist. He talks about his plan. He wants to look for life in space. There are billions of habitable planets in our galaxy. There are a hundred billion galaxies.
He wants to send many small spacecraft into space. The spacecraft will travel to a star system. The system is Alpha Centauri. It is 25 trillion miles away. The spacecraft will travel there in 20 years. They will travel at 20% of the speed of light.
The spacecraft will take pictures there. They will send the pictures back. The pictures will come back in four years.
Difficult words: physicist (an expert in physics), habitable (good for life), spacecraft (a machine which goes to space).
You can read the original story and watch the video in the Level 3 section.
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