# The orbits of the two comets lie in the plane of the Earth’s orbit. One of the comets approaches the Sun at a distance of 0.5 AU

The orbits of the two comets lie in the plane of the Earth’s orbit. One of the comets approaches the Sun at a distance of 0.5 AU, the other – at a distance of 1.5 AU. The length of their tails in this position is about 100 million km. Can Earth pass through the tails of these comets?

Comet tails are always directed away from the Sun. The first comet is approaching the Sun by 0.5 AU. (this is equal to 75 million km), which means that the minimum distance between it and the Earth can be 1 AU-0.5 AU = 0.5 AU. The comet’s tail is 100 million km long, which is more than 0.5 AU. Consequently, the Earth can pass through the tail of this comet.

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