the two images were taken 18 years apart , the first with the karl g. jansky very large array in 1996 and the second by an international team of astronomers led by the national autonomous university of mexico -lrb- unam -rrb- last year .
the dramatic changes , in a cosmic blink of an eye relative to the age of the universe , is giving an unprecedented look at how young star has been pushed out into an elongated shape that