See Trojan asteroids orbit the Earth

Earth is not alone in its orbit around the Sun but also a small Trojan asteroids in front of our planet. Nature photo-illustration Internet. The findings were published on 28 / 7 on the British journal Nature. Small asteroid with a diameter above 300 m but only called Trojan because of its special position on a fixed point or in front or behind a planet. Because Titan and Earth continuously in the same orbit, so they never collide. Jupiter, Mars and Neptune also have the Trojan asteroids orbit back together with them, similar to two moon of Saturn. The scientists at the space agency National Space Administration (NASA) discovered the asteroid, 80 million km from Earth, using a telescope Wide-field Infrared Survey Explorer (WISE). Astronomers have long said that the Earth is a Trojan asteroid discovered but said they have some difficulty because it is difficult to observe the Trojans during the day.

Theo Vietnam+