The Egg
"The Egg" was the name of an advanced probe, designed during the 24th century by Doctor Paul Stubbs. Its purpose was to study a neutron star/red giant star system in the Kavis Alpha sector. 

Dr. Stubbs began building and inspecting the probe in 2346 in preparation for the massive stellar explosion in 2366. Starfleet provided transport via the  in its Shuttlebay 2. The experiment almost didn't happen, because of an accident involving advanced nanites that Wesley Crusher was working on at the time. However, it was successful and recorded data throughout the event. ()

A graphic of the probe was displayed in Captain Jean-Luc Picard's quarters in early 2367. ()

A similar probe was displayed on the master systems display in main engineering aboard the Enterprise-D; it was located in the main shuttlebay. ()

nl:Het Ei
Egg, the