Over time the former antagonists forged an improbable peaceful partnership in the heavens, culminating months ago in the opening of the international space station Alpha.

CNN: 40 years of space flight, 20 years of shuttles

It's expected to arrive at space station Alpha at 9:08 p.m.

CNN: Goldin: Terrorists won't slow NASA

Also on tap are four space walks focusing on the station's two Solar Alpha Rotary Joints, which allow the solar panels to track the sun.

CNN: Endeavour docks with space station

The spending package scraps a technically floundering prototype of a space station lifeboat and a planned habitation module that would have increased Alpha's occupancy from three to seven.

CNN: Bush budget boosts Mars, douses Pluto, Earth

The RHIC data here will assist the mission of the Alpha Magnetic Spectrometer, which will be delivered to the International Space Station on Friday.

FORBES: Scientists Detect Heaviest Known Antimatter Particle