Spacecraft is close to a comet
A spacecraft went into space in 2004. It moved between the Earth and Mars first. Then it started to travel to a comet. It traveled around 4 billion miles (6.4 billion kilometres).
The spacecraft is 100 kilometres from the comet now. The comet is the end of the journey. It is very interesting to experts. The spacecraft studies the comet.
Experts are interested in the comet’s history. They want to know the comet’s material. It can answer many important questions.
Difficult words: spacecraft (thing which can travel in space), comet (a flying rock in space), journey (travel), history (where something came from).
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