Temporal fissure
A temporal fissure is a phenomenon which has the ability to slow the passage of time, sometimes to a gradual halt, in what is known as the "Dali paradox."

In the 29th century, Lieutenant Ducane quizzed Seven of Nine on this paradox, after having recruited her from the year 2375 for an important mission. ()

See also
Temporal fragment
Time travel
Astronomical phenomena