Ahead of Ariane 6 launch, what are the other big rockets?

Europe’s new Ariane 6 rocket is due to blast off for the first time next week, but it will launch into a quickly changing market for heavy space launchers increasingly dominated by SpaceX. Europe’s new Ariane 6 rocket is due to blast off for the first time next week, but it will launch into a quickly changing market for heavy space launchers increasingly dominated by SpaceX. Space Exploration Phys.org – latest science and technology news stories