http://harvardscience.harvard.edu/stories/person/1456 Stories and external links referencing a person (RSS) en http://harvardscience.harvard.edu/environments/articles/cradle-grave <!--paging_filter--><p>Astronomers have been using the Chandra X-ray Observatory and radio telescopes to observe two opposing jets of high-energy particles emitted following an outburst, first detected in 1998 by NASA's Rossi X-ray Timing Explorer, from the double-star system XTE J1550-564. The X-ray jets, which require a continuous source of trillion-volt electrons to remain bright, were observed moving at about half the speed of light. Four years later, they are now more than three light years apart and slowing down. One of the jets has recently been observed to fade. The observations indicate that the eastern jet is moving along a line tilted toward the Earth whereas the western jet is pointed away from the Earth.</p> <p><a href="http://harvardscience.harvard.edu/environments/articles/cradle-grave">read more</a></p> Mon, 26 Mar 2007 05:25:25 -0400 70652986 3268 at http://harvardscience.harvard.edu