Icy chips off the old asteroid block

 作者:宦刭     |      日期:2017-08-25 04:01:12
Astronomers have caught their first glimpse of the innards of an icy asteroid 7.5 billion kilometres away in the Kuiper belt region of the outer solar system. Mike Brown of the California Institute of Technology in Pasadena and his team discovered that five small Kuiper belt objects were travelling in similar orbits to 2003 EL61,