Be careful! Just because we can come up with a name for something doesn't mean that the thing exists. This is a stock item in most science fiction stories such as the ones that often come up in
Star Trek. The poor spaceship Enterprise always seems to run into one
kind of 'anomaly' in space or another, especially in the 2003 Season
episodes of 'Enterprise'.
In reality, we have no idea what kinds of things are out there
in space. All we can say is that if there are any weird things such as
vast cosmic strings, domain walls, textures or what have you, they are
not very strong and plentiful. Looking out into space, we do not see
lots and lots of 'gravitational lensing' events which cannot be explained
in terms of distant galaxies being lensed by the gravitational fields from
known foreground galaxies. Any anomalies in spacetime, ought to be accompanied
by curvature and lensing of the light from objects behind the 'anomaly' along
the line of sight to us.
We do not see anything like this.
Return to Dr. Odenwald's Gravity
page at the Astronomy Cafe Blog.