... Earth-sized planet found orbiting Alpha Centauri B. This attracted a lot of media ... orbits of any more distant planets are liable to be highly chaotic, as the star ... orbits-Sun-like-star-Alpha-Centauri-B.html €аand http://www.eso.org/public/news ...
... NANOSAIL-D: NASA's first Earth-orbiting solar sail, NanoSail-D, is circling our planet and attracting the attention of sky ... NanoSail-D unfurled the first ever 100-square-foot solar sail in low-Earthorbit on Jan. 20. ...
... small" body that happens to have an orbit that passes close to the Earth ... some 1500 near-Earth asteroids larger than 1 km diameter on Earth-crossing orbits ... into unstable orbits which may eventually cross that of the Earth, or even sometimes ...
... With about 1 percent of incoming comets ending up on relatively short-period Earth-crossing orbits, it is expected that several thousand dormant comets could be currently posing a potential threat to our planet. ...
... An exceptional close-approach asteroid On 13th April 2029 a small asteroid in an Earth-like orbit, 2004 MN4 will pass within 5 6 Earth radii of the Earth6 , becoming a naked-eye ob ject crossing the sky at tens of degrees per hour. ...