In the 1980 film\u00a0Star Wars: The Empire Strikes Back,\u00a0Han Solo and friends try to escape pursuing imperial forces by flying through an asteroid field. Droid C-3PO remarks, \u201cthe odds of successfully navigating an asteroid field is approximately 3,720 to 1\u201d. <\/p>\n
The scene depicts a chaotic, dense field of rocks swirling and spinning through space. This scenario has been played out many times in the cinema.<\/p>\n
But the reality is very different, at least for the asteroid belt in our Solar System<\/a>. Based on our knowledge of the volume of the asteroid belt<\/a>, and an estimate of the number (and size) of asteroids, astronomers think that the average distance between asteroids is almost 1 million kilometres. <\/p>\n So, the gaps between asteroids are vast enough that it\u2019s an easy task to navigate between them.\u00a0<\/p>\n In fact, a number of space probes<\/a> have already done it. NASA\u2019s Pioneer 10 was the first. On 15 July 1972, the car-sized probe first encountered the asteroid belt, beginning a seven-month, 434-million-km (267-million-mile) curve through the main belt. <\/p>\n Although, at the time, mission planners didn\u2019t know the density of the asteroid belt very accurately, their hunch proved correct, and the probe passed through unscathed. <\/p>\n Since then, eight other probes have been shot through the asteroid belt; Pioneer 11, Voyager 1, Voyager 2, Ulysses, Galileo, Cassini, New Horizons and Juno. None of them flew a course deliberately to avoid asteroids and none of them had any unwelcome encounters.\u00a0<\/p>\n In other star systems<\/a> things could be different; asteroids could be more tightly packed. Such asteroid systems wouldn\u2019t survive very long after forming, however, as their components would be constantly colliding and breaking apart. <\/p>\n So, the typical sci-fi scenario of a dense swarm of fast-moving rocks is almost certainly not found in nature.\u00a0<\/p>\n This article is an answer to the question (asked by Suzanne Baxter, Cornwall) ‘How difficult would it be to fly through the asteroid belt?’<\/p>\n To submit your questions, email us atquestions@sciencefocus.com<\/a>, or message our Facebook<\/a>, X<\/a>, or\u00a0Instagram<\/a>pages (don’t forget to include your name and location).<\/p>\n Check out our ultimate\u00a0fun facts<\/a>\u00a0page for more mind-blowing science<\/p>\n Read more:<\/p>\n