Most rockets need stable support for a few seconds after ignition while the engines ramp up and stabilize at full thrust.

A rocket built of lightweight materials needs only one stage to soar into space, at least in theory.

The new rocket no longer needed the rocket stick, and had a higher accuracy.

The Chinese have always insisted that their rocket and missile programs did not need help from American companies.

Hypergolic rockets do not need an ignition system, so they tend to be inherently simple and reliable.

The most notable disadvantage is that a rocket needs to coast for a while, then restart while under zero g conditions.

A three-gravity rocket would have needed to start before the Platform rose above the horizon.

"This source of helium should supply all our rocket needs for years to come!"

A high specific impulse means that a rocket needs less fuel to perform as well.

If the specific impulse is lower, it means that the rocket needs more fuel to perform as well.