1. DISCOVERY

    Asteroid, Earth Share Same Orbit

    This artist's concept provided by NASA illustrates the first known Earth Trojan asteroid, discovered by NEOWISE, the asteroid-hunting portion of NASA's WISE mission. The asteroid is shown in gray and its extreme orbit is shown in green. Earth's orbit around the sun is indicated by blue dots. The objects are not drawn to scale. The asteroid's orbit is well defined and for at least the next 100 years, it will not come closer to Earth than 15 million miles (24 million kilometers). (AP Photo/NASA - Paul Wiegert)

    The asteroid is shown in gray and its extreme orbit is shown in green. (Paul Wiegert, NASA / AP Photo)

    NASA has recently discovered that Earth shares its orbit around the Sun with a small "Trojan" asteroid, which is just 300 meters (984 feet) in diameter, but owes its distinct name to its stable spot either directly behind or in front of Earth. Since they share the same orbit, there is no risk that the Trojan will ever collide with Earth—or at least not any time soon. According to the author who published a study on the discovery, the asteroid's orbit is "stable for at least 1,000 years," and will remain at least 15 million miles away from Earth for the next 100 years.

    Read it at Agence France-Presse