Name: Unity and Zarya joined in orbit
Start: 1998-12-06

Began assembly of the International Space Station.

1998-02-17 Voyager 1 becomes the most distant spacecraft Same organization: National Aeronautics and Space Administration
1997-06-27 NEAR flies past asteroid Mathilde Same organization: National Aeronautics and Space Administration
1997-07-04 Mars Pathfinder lands Same organization: National Aeronautics and Space Administration
1998-12-06 Satmex 5 — launch Same date in another year
1995-12-06 Insat 2C/Telecom 2C — launch Same date in another year
2009-12-06 WGS 3 — launch Same date in another year