Apollo 15
Apollo 15 (July 26, 1971August 7, 1971) was the ninth crewed mission in the United States' Apollo program and the fourth to land on the Moon. It was the first J mission, with a longer stay on the Moon and a greater focus on science than earlier landings. Apollo 15 saw the first use of the Lunar Roving Vehicle.

The mission began on July 26 and ended on August 7, with the lunar surface exploration taking place between July 30 and August 2. Commander David Scott and Lunar Module Pilot James Irwin landed near Hadley Rille and explored the local area using the rover, allowing them to travel further from the lunar module than had been possible on previous missions. They spent 18 hours on the Moon's surface on extravehicular activity (EVA), and collected of surface material.

At the same time, Command Module Pilot Alfred Worden orbited the Moon, operating the sensors in the SIM bay of the service module. This suite of instruments collected data on the Moon and its environment using a panoramic camera, a gamma-ray spectrometer, a mapping camera, a laser altimeter, a mass spectrometer, and a lunar subsatellite deployed at the end of the moonwalks. The lunar module returned safely to the command module and, at the end of Apollo 15's 74th lunar orbit the engine was fired for the journey home. During the return trip Worden performed the first spacewalk in deep space. The Apollo 15 mission splashed down safely on August7 despite the loss of one of its three parachutes.

The mission accomplished its goals but was marred by negative publicity the following year when it emerged that the crew had carried unauthorized postal covers to the lunar surface, some of which were sold by a West German stamp dealer. The members of the crew were reprimanded for poor judgment, and did not fly in space again. The mission also saw the collection of the Genesis Rock, thought to be part of the Moon's early crust, and Scott's use of a hammer and a feather to validate Galileo's theory that when there is no air resistance, objects fall at the same rate due to gravity regardless of their mass.
Q46611
Apollo program
ORG
Q495307
land on the Moon
Concept
None
J mission
UNK
Q405
Moon
CEL
Q275816
Lunar Roving Vehicle
MISC
Q868320
Commander
UNK
Q278656
David Scott
PER
Q868320
Lunar Module Pilot
UNK
Q297801
James Irwin
PER
Q5637998
Hadley Rille
LOC
Q208382
lunar module
Concept
Q182020
extravehicular activity
Concept
Q868320
Command Module Pilot
UNK
Q539385
Alfred Worden
PER
Q680027
SIM
MISC
Q680027
service module
MISC
Q5520325
gamma-ray spectrometer
Concept
Q216197
altimeter
Concept
Q180809
mass spectrometer
Concept
Q210448
lunar orbit
Concept
Q182020
spacewalk
Concept
Q914838
the crew had carried unauthorized postal covers
EVE
Q1502096
Genesis Rock
MEDIA
Q4232578
crust
Concept
Q5518616
Galileo's theory
UNK
Q194068
Apollo 15
MISC
Q194068
Apollo 15
MISC
Q194068
Apollo 15
MISC
Q194068
Apollo 15
MISC
1971-07-26T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
July 26, 1971
DATE
1971-08-07T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
August 7, 1971
DATE
+15^^http://www.w3.org/2001/XMLSchema#decimal
15
NUMBER
+15^^http://www.w3.org/2001/XMLSchema#decimal
15
NUMBER
+26^^http://www.w3.org/2001/XMLSchema#decimal
26
NUMBER
+7^^http://www.w3.org/2001/XMLSchema#decimal
7
NUMBER
+30^^http://www.w3.org/2001/XMLSchema#decimal
30
NUMBER
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
+18^^http://www.w3.org/2001/XMLSchema#decimal
18
NUMBER
+15^^http://www.w3.org/2001/XMLSchema#decimal
15
NUMBER
+74^^http://www.w3.org/2001/XMLSchema#decimal
74
NUMBER
+15^^http://www.w3.org/2001/XMLSchema#decimal
15
NUMBER
+7^^http://www.w3.org/2001/XMLSchema#decimal
7
NUMBER
part of
instance of
UTC date of spacecraft launch
crew member(s)
crew member(s)
significant event
crew member(s)
significant event