A retrorocket (short for retrograde rocket) is a rocket engine providing thrust opposing the motion of a vehicle, thereby causing it to decelerate. They...

spacecraft was, essentially, a Vostok spacecraft that had a backup solid fuel retrorocket added to the top of the descent module. The ejection seat was removed...

impact trajectory, from 2.6 km/s relative to the Moon before firing retrorockets to a soft landing about 3 minutes 10 seconds later. Each craft was planned...

the objective of achieving a soft landing on the Moon; however, its retrorocket firing occurred too late, and suffered a hard impact on the lunar surface...

blunt heat shield forward for atmospheric re-entry. He also tested the retrorockets which would return later missions from orbit, though the capsule did...

spacecraft was basically a Vostok spacecraft that had a backup, solid-fueled retrorocket added to the top of the descent module. As it was much heavier, the launch...

Soviet, U.S., Chinese and Indian spacecraft have used braking rockets (retrorockets) to make soft landings and perform scientific operations on the lunar...

pushing them forward. Such negative accelerations are often achieved by retrorocket burning in spacecraft. Both acceleration and deceleration are treated...

the missile's retrorocket, the RD-854 engine, causing the warhead to take on a ballistic path towards its target. The warhead, retrorocket, and guidance...

timed cut-offs of previous flights. SA-3 also featured the first use of retrorockets on Apollo hardware. These were the only functional part on SA-3 of what...

board the rocket taking pictures of the target area, before a second retrorocket motor, located in the nose of the rocket, fired to return it to its point...

essentially an enlarged version of the Mercury capsule. Unlike Mercury, the retrorockets, electrical power, propulsion systems, oxygen, and water were located...

undecided on the course of action to take. Some controllers thought the retrorocket pack should be jettisoned after retrofire, while other controllers thought...

200 mi) from the Moon, the spacecraft was oriented for the firing of its retrorockets and its spin was stopped in preparation for landing. From this moment...

of the translational control engines were mounted on the side of the Retrorocket Module, near the spacecraft's center of mass. Four of these were rated...

and a peak velocity of 5906 km per hour. At this stage it also fired retrorockets that would be used on later missions to separate the rocket stages. On...

achieved by Parachute—often this is into water. Vertical rocket power using retrorockets, often referred to as VTVL (vertical landing referred to as VTOL, is...

backup retrorocket engine. The spacecraft carried 13 days of provisions to allow for survival and natural orbital decay in the event the retrorockets failed...

Aldrin had already set foot on the Moon when Luna 15 fired its main retrorocket engine to initiate descent to the surface at 15:47 UT on 21 July 1969...

never reestablished, and the mission was unsuccessful. The solid-fuel retrorocket may have exploded near the end of its scheduled burn. Wikimedia Commons...

which hang beneath the pallet. As soon as the rods touch the ground a retrorocket fires, slowing the BMD to a descending speed between 6 m/s and 7 m/s...

horizontal position. Even then, the cosmonaut experienced 8 to 9g. If the retrorocket failed, the spacecraft would naturally decay from orbit within ten days...

fueled Service Module, which would have required building a lightweight retrorocket module for deorbit. These plans were eventually scrapped, in favor of...

diameter, a mono-propellant mid-course motor, a 22.6 kN (5,080 lbf) thrust retrorocket, and a gold- and chrome-plated hexagonal base 1.5 m (4 ft 11 in) in diameter...

deal with this problem, ground controllers decided that leaving the retrorocket pack in place might help keep the loose heat shield in place. They relayed...

director decided to abort the mission. After 18 orbits, Soyuz 1 fired its retrorockets and reentered the Earth's atmosphere. Despite the technical difficulties...

re-entry. The reentry involved two more challenges: an improperly timed retrorocket firing caused the Voskhod 2 to land 386 kilometers (240 mi) off its designated...

flyby when it initially failed to separate from the probe. Because of a retrorocket failure, the probe skipped off of the atmosphere of Mars and flew past...

to soften a hard parachute landing immediately before touchdown (see retrorocket). Rockets were used to propel a line to a stricken ship so that a Breeches...

retrorockets were located inside each of the four conical engine fairings. At separation of the S-IC from the flight vehicle, the eight retrorockets fired...