There are about 100,000 balls of ice and rock -- comets, really -- out there, that are 50 miles in diameter or more, and they regularly take a little spin, in towards the Sun and pass reasonably close to us.
Il y a environ 100 000 boules de glace et de pierre -- des comètes -- là-haut, qui font 80 km de diamètre et plus, et elles font régulièrement un petit tour en direction du soleil et passent relativement proche de nous.
There are about 100,000 balls of ice and rock -- comets, really -- out there, that are 50 miles in diameter or more, and they regularly take a little spin, in towards the Sun and pass reasonably close to us.
Il y a environ 100 000 boules de glace et de pierre -- des comètes -- là-haut, qui font 80 km de diamètre et plus, et elles font régulièrement un petit tour en direction du soleil et passent relativement proche de nous.