Hong-Sheng Zhao of Leiden University in the Netherlands calculates that acloseencounter with another one of the Milky Way's satellites, the Large Magellanic Cloud, could have knocked Sgr into a closer orbit two or three billion years ago.
It did a very closeencounter with Jupiter in 1974, similar to the comet, you know, that crashed into Jupiter that dramatically changes orbit to an orbit that now it goes through orbit of Mars, through orbit of Jupiter.
Science editor Alan Boyle's blog: Radar observations made during this week's closeencounter with the asteroid Apophis have ruled out the risk of a collision with Earth in 2036, NASA says.