Editing Spaceflight (section)

=== Launch ===
{{Main|Space launch}}
Rockets are the only means currently capable of reaching orbit or beyond. Other [[non-rocket spacelaunch]] technologies have yet to be built, or remain short of orbital speeds. A [[rocket launch]] for a spaceflight usually starts from a [[spaceport]] (cosmodrome), which may be equipped with launch complexes and [[launch pad]]s for vertical rocket launches and runways for takeoff and landing of carrier airplanes and winged spacecraft. Spaceports are situated well away from human habitation for noise and safety reasons. [[Intercontinental ballistic missile|ICBMs]] have various special launching facilities.

A launch is often restricted to certain [[launch window]]s. These windows depend upon the position of celestial bodies and orbits relative to the launch site. The biggest influence is often the rotation of the Earth. Once launched, orbits are normally located within relatively constant flat planes at a fixed angle to the axis of the Earth, and the Earth rotates within this orbit.

A [[launch pad]] is a fixed structure designed to dispatch airborne vehicles. It generally consists of a launch tower and flame trench. It is surrounded by equipment used to erect, fuel, and maintain launch vehicles. Before launch, the rocket can weigh hundreds of tons. The [[Space Shuttle Columbia|Space Shuttle ''Columbia'']], on [[STS-1]], weighed 2030 metric tons (4,480,000 lb) at takeoff.