According to the newspaper, despite the "nascent" rapprochement between Russia and the United States over Syria, Moscow's alleged "interference" in the Ukrainian conflict has caused diplomatic relations between Moscow and Washington to reach a post-Cold War low.
Earlier this year, Washington imposed sanctions against Russia, and tried to isolate Moscow on the international arena.
However, this failed to prevent the two countries from developing a "close partnership" in the space exploration sector, the newspaper said, adding that Washington needs Russia because the latter helps it send its astronauts to the International Space Station (ISS).
In addition, US rockets are still equipped with Russian engines and will continue to use them until at least 2017, the newspaper recalled.
After four decades of rivalry, the construction of the ISS gave a powerful impetus to space cooperation between Moscow and Washington in 1998. Also, Russia started sending American astronauts to the space outpost in 2011 following the closure of the US shuttle program, according to El Pais.
The United States has repeatedly tried to hammer out its own program to send astronauts to ISS, with Washington insisting on the need to avoid using Russian engines in US rockets.
Understandably, Washington is concerned over its current dependence on Russia in the space sector, something that US authorities are unlikely to resolve in the near future, the newspaper concluded.
