Sumnje da je čovek bio na Mesecu

rafiki:
Rade, da nisi mozda zaboravio da postoji razlika izmedju gravitacionog ubrzanja na Mesecu i na Zemlji? I sta znaci ta razlika?

Pozdrav

zzzz:
Sadašnji tehnološki nivo ne može rješiti povratak živih astronauta na Zemlju.Povratak sa međunarodne stanice ISS je (uz dosta muka i nekoliko žrtava) rješen.Kako je to neprijatno kočenje u atmosferi može se pogledati .

Nisam zaboravio, masa od kile je ista i na Zemlji i na Mesecu. Akcija i reakcija... To je neki, ne sećam se ko, rekao još davno, pa ma koliko se trudili da mi utuvite u glavu, teško da ćete... Udžbenike u ruke...

hotchimney:

Ti sve to znaš na osnovu iskustva?



Na osnovu čega si to napisao?
Čitao si dnevnik pilota? Ili Memoare?
Ili kako, iz kog izvora?

July 20, 1969: The day began on the farside of the Moon. Armstrong, Aldrin and crewmate Mike Collins flew their spaceship 60 miles above the cratered wasteland. No one on Earth can see the Moon's farside. Even today it remains a land of considerable mystery, but the astronauts had no time for sight-seeing. Collins pressed a button, activating a set of springs, and the spaceship split in two. The half named Columbia, with Collins on board, would remain in orbit. The other half, the Eagle, spiraled over the horizon toward the Sea of Tranquillity.

"You are Go for powered descent," Houston radioed, and the Eagle's engine fired mightily. The bug-shaped Eagle was so fragile a child could poke a hole through its gold foil exterior. Jagged moonrocks could do much worse. So when Armstrong saw where the computer was guiding them-into a boulder field-he quickly took control. The Eagle pitched forward and sailed over the rocks.
Meanwhile, alarms were ringing in the background.

"Program alarm," announced Armstrong. "It's a 1202." The code was so obscure, almost no one knew what it meant. Should they abort? Should they land? "What is it?" he insisted.

Scrambling back in Houston, a young engineer named Steve Bales produced the answer: The radar guidance system was pestering the computer with too many interruptions. No problem. "We've got you..." radioed Houston. "We're Go on that alarm."

And on they went. Things, however, were not going exactly as planned. The Sea of Tranquillity was supposed to be smooth, but it didn't look so smooth from the cockpit of the Eagle. Armstrong scanned the jumbled mare for a safe place to land. "60 seconds," radioed Houston. "30 seconds." Mission control was hushed as the telemetry came in. Soon, too soon, the ship would run out of fuel.

The purpose of the study was to evaluate the mission to land a spacecraft on the south pole of the Moon in 2019.

The Phase B1 study carried out by primary contractor Astrium confirmed the mission schedule and worked out the key technologies needed for a soft landing. These included how to automatically detect and avoid hazards, development of autonomous visual navigation systems, and advanced propulsion systems. In addition, the navigation system hardware was tested on a realistic simulated lunar landscape at the DLR Institute of Space Systems in Bremen, Germany. The total cost of the Lunar Lander project is estimated at 500 million euros (US$647 million).

So when Armstrong saw where the computer was guiding them-into a boulder field-he quickly took control. The Eagle pitched forward and sailed over the rocks.

dusanboss:


Pa dobro, upravu je čovek, donekle. Masa je ista, kg zavisi od gravitacije koja deluje na tu masu. Samo što na tu istu masu na mesecu deluje 7 puta slabija gravitacija pa ispada da umesto 70 kg imas 10. Nije mi jasno zašto pominje akciju i reakciju. Verovatno je hteo da kaže kako je sila potrabna za smanjivanje brzine modula po x (ili z) osi na mesecu ista kao i na zemlji ako se izuzme otpor vazduha. Zato bitne razlike ima prilikom krtanja po y (gore-dole) osi