The First Landing on the Moon Essay

The First Landing on the Moon Essay.

There are many notable events in within the 20th century, and all of them had a significant impact on our way of life. There are many innovations in virtually all the aspects one could think of like in technology, society, medicine, ideology, and politics. But out of all the significant events within the 20th one had certainly stood out: the first landing on the moon. This particular event is of great significance because it had a strong positive impact on the way people think.

On the 20th of July 1969, Neil Armstrong and the rest of the Apollo 11 crew were successful in safely landing on the moon’s surface. Armstrong had described the momentous event through a radio transmission where he had uttered his famous phrase “one small step for man, one giant leap for mankind” After the success of the Apollo 11 mission, many regard it as one of the most significant events in all human history. But there are some skeptics who view the event as the most elaborate hoax in history.

They accuse that the first landing on the moon was just shot inside a movie studio. These skeptics are also the ones who view humanity in a negative light. What they are trying to say is that humanity is not capable of succeeding in such feat. Their belief is opposed to the thinking of many people around the globe that had appreciated the event. The successful first landing on the moon had given humanity an immense positive thinking. The first moon landing had shown everyone that humanity is able to achieve great things.

Moreover, the first moon landing serves as an inspiration even up to this date. And now, if we are to attempt something that is seemingly impossible, we could just think of the first moon landing as an inspiration. The inspiration that the first moon landing had given to us had propelled humanity to progress far better than any space rocket.


NASA. First Lunar Landing. Retrieved 21 May 2008< http://cass. jsc. nasa. gov/expmoon/Apollo11/A11_Overview_summary. html >

The First Landing on the Moon Essay

Exploration of Moon Essay

Exploration of Moon Essay.

The benefits evident in exploring space. Details the advantage of the moon trip as a “stepping stone” to mars and beyond. Information on the technological advances. Sponsored Links

In the days before Apollo 11, the moon was a goal, a target to be accomplished to win the space race. This is how the moon has always been treated, as a finish line, not a starting point. After the Apollo missions, no one has returned, we have turned our eyes instead to Mars and other planets.

The moon offers humans a great resource: space exploration without traveling outrageous distances. Two separate Mars crafts have been destroyed. This failure perhaps could have been prevented by using the moon as our stepping stone to other planets and beyond. The moon has not been fully studied, nor has it been utilized to the utmost of our powers. If NASA and other space agencies would use the moon to plan and prepare for future missions, it would greatly increase their chances of success.

The moon has always been something of a mystery. In ancient times, it was worshipped as a god. A couple hundred years ago man thought it was made of cheese. When John F. Kennedy issued the challenge to go to the moon, it became a goal. In present day it is thought of as conquered. The moon’s puzzle is only half solved and already we bypass it to the next problem. The moon could be used experiment relatively cheaply with craft whose final destination was Mars. This would drastically cut-down on cost of experimental costs and price of failures.

The moon could also be used to practice mining operations in low gravity, and foreign worlds. If we discover resources on another planet, training will then begin for astronauts, maybe to late. If we use the moon as a training/experimenting zone then we may be prepared for the future. The moon is an obtainable target for humans, we know we can send manned craft there. The moon is the optimal training ground for any such training operations.

The moon may be the key that unlocks the mystery of settlements on other planets. Suppose the world becomes overcrowded, experiences an ice age, or nuclear war. Where will humans go? Mars has been pointed to as the answer. This accounts for part of the fascination with mars; however, two craft have failed to get to mars. If we are to set up a colony on another planet, why not practice on the moon. The moon is accessible, easier to get to, and not to mention days, not months, away. A colony on the moon could easily be abandoned, and the colonists head for home with minimal supplies or preparations. Whereas with Mars, food would need to be rationed, packed for the multiple month journey home. The moon can act as a testing ground for extra-terrestrial colonies.

The moon is optimal for many types of experimentation. It has been bypassed hastily as a summit already reached, a mountain already climbed. Instead of being observed as a perfect research and development center, it has been discarded. The moon may prepare us for the future, teach us about our past, or tell us how to survive the present. It has been to readily forgotten, let us return to the “New World,” as those who followed Columbus did, hundreds of years ago.

Exploration of Moon Essay

Celestial Mechanics and Orbital Period Essay

Celestial Mechanics and Orbital Period Essay.

AE-641 Problems Set No. 1 1. The orbital period of an Earth satellite is 106 min. Find the apogee altitude if the perigee altitude is 200 km. 2. Find the orbital period of a satellite if the perigee and apogee altitudes are 250 km and 300 km, respectively. 3. Find the maximum and minimum orbital speed of the Earth if the eccentricity of the Earth’s orbit around Sun is 1/60. What is the mean speed if the mean radius is 1 AU? (Sun’s Gm1=1. 327×10 11 km3/s 2. ) 4.

Given the orbital period of Mars around Sun as 687 Earth mean solar days, find the semi-major axis of Mars orbit in AU.

5. Estimate solar gravitational constant using Kepler’s third law. 6. A spacecraft in a 200 km high circular Earth orbit fires its retro-rocket, reducing speed instantly by 600 m/s. What is the speed of the spacecraft when it reaches an altitude of 100 km? (Assume zero atmospheric drag. ) 7. What is the parabolic escape velocity from a geosynchronous orbit?

What extra speed will be required for a geosynchronous satellite to escape Earth’s gravity? 8.

A hyperbolic Earth departure trajectory has a perigee speed of 15 km/s at an altitude 300 km. Calculate (a) hyperbolic excess speed, (b) radius and speed when true anomaly is 100o. 9. Voyager-I’s closest approach to Saturn was at a periapsis radius of 124000 km and the hyperbolic excess speed was 7. 51 km/s. What was the angle through which the spacecraft’s velocity vector was turned by Saturn? (Saturn’s m = 37. 931×10 6 km3/s2. ) 10.

Derive expressions for the position and velocity vectors of a spacecraft in a coordinate system fixed to the orbital plane such that the unit vectors of the axes are along the eccentricity vector, e, the direction of parameter, p, and the angular momentum vector, h. Express the answers in terms of semi-major axis, a, eccentricity, e, and true anomaly, q. 11. Halley’s comet last passed perihelion on February 9, 1986. Its orbit has a semi-major axis, a=17. 9564 AU and eccentricity, e=0. 967298. Predict the date of next return (perihelion) of the comet.

Celestial Mechanics and Orbital Period Essay