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hey i think its because of the solar system
LM-4callsign SnoopyThe lunar module had two parts, the descent stage and the ascent stage. The descent stage, or lower part of the lunar module, contained an engine for landing on the Moon. This stage was a 3.23-meter-tall cruciform structure of aluminum alloy, which, with its four legs extended, had a maximum diameter of 9.45 meters. This stage also contained storage bays for equipment, and a ladder attached to one of the legs to give a crew access to the surface. When leaving the lunar surface, the descent stage would serve as the launch platform for the ascent stage. The ascent stage was basically a cylindrical aluminum structure 4.29 meters in diameter and 3.75 meters tall. During their time on the surface, the crew would live in and operate from this part of the spacecraft. It would also be used to return the crew to orbit and the command service module after surface operations were completed. -from the Lunar and Planet InstituteThe Command Module was called Charlie Brown and was designated CM-106. While not included in the official mission logo, due to the use of their names only as callsigns, the Peanuts characters Charlie Brown and Snoopy became semi-official mascots for the mission. Peanuts creator Charles Schwartz also drew some special mission related artwork for NASA.
-- The semi-major-axis of the lunar orbit is 384,403 km (238,857 miles). -- The distance at perigee (closest point to Earth) is 363,104 km (225,622 miles). -- The distance at apogee (farthest point from Earth) is 406,696 km (252,088 miles).
semi circle
Nothing has been confirmed, but anything is possible, given that his last appearance ended in a semi-cliffhanger, along with several other important (and recurring) characters.
semi-lunar valves
The semi lunar valves control the flow of blood coming back into the Right Atrium.
bicuspid valve tricuspid valve semi lunar valve
The left ventricle pumps blood into the aorta through the aortic semi-lunar valve.
Pulmonary semi-lunar
the semi lunar valves stop the blood flowing the wrong way !
Ze semi runar valve heps by doing what it does best. by contoling the frow of the brood frmo the ven tickle to arterie
The heart pumps blood from the left ventricle through the aortic semilunar valve into the Aorta.
The left atrium, the left ventricle, mitral valve, and the semi lunar aortic valve.
Pulmonary semi-lunar
There are semi-lunar valves in the human heart: the aortic valve and the pulmonary valve. They prevent blood from flowing back into the ventricles.
The semi-lunar valves are located between the ventricles and the major arteries. There are two of them: the aortic valve and the pulmonic valve. They prevent blood from flowing backward out of the vessel back into the ventricle.