However, what seems more comprehensible is that they can measure how this object (string?) is moving, and it is moving by the velocity 0.7c across our line of sight. OK, at any rate, they believe that this string is oscillating, and the smooth period of 100 days of the oscillation is translated to the radius comparable to 1000 astronomical units - and the string should be in our galaxy, just 10,000 light years from the Sun!