Moon Definition and 1000 Threads

Homework Statement COnsider two identical 1kg blobs of water on opposite sides of the Earth, one on the side facing the moon and the other on the side farthest away from the moon. a)calculate the gravitational force of the moon on the blob on the side of the Earth closest to the moon...

Hello to all, Just a question related to a thought I’ve had for some time now… Most astronomy interested people now about the earth-moon relationship including tides, locked rotational periods and stuff like optical illusion about moon size as it moves about in the night sky. Well, for...

Couldn't we just point some high powered telescopes at the moon and show these skeptics the equipment, tire tracks and footprints left behind on the moon by all the missions that went there? Has anyone done that and is there a link to the evidence? Oh... Here's one answer... :redface:

... with all this drilling equipment and an idea, albeit a dumb one. Big tube, through the moon. Big permanent mag lev tube... packed with solenoids... and a brick, covered in magnets. Drop the brick in the tube, vacuum of space, no resistance that I can think of... Hooke says it will...

]1. Homework Statement [/b] Calculate the gravitational acceleration at the surface of (a) Mercury and (b) Saturn's moon Titan? Ive found A by using: F=GMm/r^2 a=Gm/r^2 But how do I find saturns moon titan...All i know is saturn mass which is 5.69e26 and radius6.03e7 of staurn...

http://www.telegraph.co.uk/news/newstopics/howaboutthat/2248463/Moon-mistaken-for-UFO.html How many other "moon mistaken for a UFO" stories can you find? :)

I'm looking for a picture like this http://lasp.colorado.edu/~bagenal/1010/graphics/jupiter_spect.gif but with the spectrum of the moon instead. ¿Can someone help?

Hi guys, I'm stuck on a problem with my homework: #44. How far above the surface of the Earth does an object have to be in order for it to have the same weight as it would have on the surface of the moon? (Neglect any effects from the Earth's gravity for the object on the moon's surface or...

The lit part of the moon in the dark sky is white, of course. What do you do when teaching on a whiteboard? If I use a blackboard, shading (with white chalk) the part that is lit make sense. However, I am always teaching on a whiteboard and using white paper in class. Therefore, I shade...

Homework Statement the image below shows the Moonat perigee and apogee. Measure the diameters for the two, and determine the ratio between perigee and apogee idstance.Based on your result, what is the eccentricity of the Moon'orbit? Compare your value with the Moon' s mean orbital...

Found this in another forum: 1) Is the moon really orbiting the earth? 2) What is the effect of the Universe's expansion on the Moon/Earth or Sun/Earth distance? http://www.news.cornell.edu/stories/March06/CMB_Timeline300.jpg From that image, there's been about 10-20% universe...

Homework Statement "Calculate the gravitational force between: A) The sun and the earth B)The moon and the earth" Homework Equations F= M/r2 The Attempt at a Solution A)The sun and the earth Earth: mass 5.97*10^24 kg Radius 6,380,000 meters Sun: mass 1.99*10^30 Radius...

[SOLVED] gravitational field Homework Statement How much work is done by the Moon's gravitational field as a 1100kg meteor comes in from outer space and impacts on the Moon's surface? Homework Equations W=GMm/r The Attempt at a Solution W=6.67 X 10^-11(6 X 10^22)(1100kg)/1.5 X...

The moon rotates on its own axis with such exquisite precision that it turns exactly once in a time exactly equal to the time to complete its orbit around Earth. How did it get that way? More - if there are plausible or proven explanations, then will the Earth day sometime end up equal to the...

How to effectively get into a polar orbit and land near (in) a S. polar crater and look for sublimated water (i.e. hydrogen). So coast to the Lagrangian pt between Earth and moon; then accelerate into a polar orbit. Land a rover in Mars-like manner. Use a laser, at a distance, to sublimate any...

Homework Statement Moon effect. Some people believe that the Moon controls their activities. The Moon moves from being directly on the opposite side of Earth from you to be being directly overhead. Assume that the Earth-Moon (center-to-center) distance is 3.82 x 10^8 m and Earth's radius is...

[SOLVED] gravity fun Homework Statement 1. Calculate the speed of objects on the Earth's surface caused by the Earth's own rotation around its own axis. 2. Find the mass of the Earth using its time period of revolution of the moon around the earth. 3. Find the mass of the sun using the...

If it takes the moon 27.4 days to complete one orbit about the Earth, why does it take 29.5 days between a full moon to full moon cycle? Any mathematical proof would be helpful, thanks.

http://space.newscientist.com/article/dn13748-stephen-hawking-calls-for-moon-and- Has anyone an estimate of the cost of supporting a first generation on the Moon, for arguments sake let's say a colony of 100 people.

Homework Statement A projectile is fired straight away from the moon from a base on the far side of the moon, away from the earth. What is the projectile's escape speed from the earth-moon system? Homework Equations Escape velocity = sqrt[2GM/R] The Attempt at a Solution What...

how would this work on the moon?? theory.. i already posted this in the astrophysics forum, but i know this is visited a lot more, and this isn't that advanced. it's also kind of time-sensitive, so i figured id post here in hopes someone stumbles along and knows how to explain it.. thanks...

Would there be earthquakes and tsunamis, or would nothing odd happen at all apart from smaller tides?

Homework Statement First variables deal with which to colonize a: Mars easier to terraform *or so I've been told* or b: the moon close yet hard to stabilize; the main point of the assignment that i have trouble with is finding a new age propulsion system and a working systems of checks and...

Homework Statement The amount of energy required to get a spacecraft from the Earth to the Moon a. is greater than the energy required to go from the Moon to Earth. b. is the same as the energy required to go from the Moon to Earth. c. is less than the energy required to go from the...

If the Earth suddenly disappeared. and the moon started to travel in a straight line instead of its orbit of earth, would the moon continue to rotate on its axis every 27.3 days?

If I was designing a basket ball court for the moon what exactly would i have to change in order for it to work? Like how would i change the size, make it smaller or larger? What other regulations would i need to change in order to adapt this sport to the moon?

There's a documentary with this title, haven't seen it yet but would like to see it. The premise of the film is, among others, that the Earth's axis would wobble (therefore unstable seasons) causing many other things to happen if the moon did not exist, but it does not seem obvious to me at...

If a spaceshuttle collided with the moon what would happen? What if a missile hit it? If I am not mistaken the distance between our Earth and the moon varies, so let's say the impact occurs when the moon's position is at its farthest normal distance from earth.

Why do we see the near side of the moon only?? Why do we see the near side of the moon only?Why not the far side??

As part of an on-going project, I have to calculate the Angular Diameter of the moon. This is to be done using a digital SLR Camera. I have some pictures, as well as some calibration images (a ruler a fixed distance away). I am pretty sure I need to use the formula: plate scale =...

i am having trouble with this exercise, i don't understand much and the professor doesn't explain too well so I am kinda lost. Consider a person on the moon who launches herself into a standing broad jump at 45 degrees. The average force generated during launching is, F = 2W and the...

Homework Statement Long jumper jumps 8.12 m, reaching a height of 0.84 m half way through his jump. What was his velocity as he left the ground? Also, how far would he be able to jump on the moon (g = 1.63 m/s^2) and how much time would be spend off the lunar surface.Homework Equations d = v1...

Hey all. My kids and me were trying to get some shots of the old moon tonight. I took about 40 or so so far. We were going out every half hour or so and I was shooting 10 or so shots per trip. As it is minus 20 degrees we were pretty quick about it. As we came in I would pop the camera card in...

If the last one was any indication, tonight's total eclipse will completely darken the entire full moon. Just remember, never look directly at the moon without protection. My girl and I were gazing at the full moon one night twenty years ago and now we're married with two kids.

Please help me ya'll. "If the moon was twice as far away from the Earth as it actually is, how would tides be effected?" Any ideas/answers? Thanks!

Imagine a solid chain from the Earth to the moon's surface (which I believe is 1.5 light seconds away). Now Imagine two scenarios. First scenario is that the chain is attached directly to the moon's surface. Second scenario is the chain is unattached. What happens if I tug on the chain in both...

Uranus, Neptune, Jupiter, Mars, Pluto, etc.--each of them has either moons or rings. Both rings and moons revolve around their equators regardless of the planets' axis. What concerns me is that while Earth's moon also revolves around the axis of Earth, why is it that during the saros, the moon...

Q: What kind of trajectory was used? And why was it used over the Hohmann transfer? The time of flight to the moon on Apollo 11 was 100 hours, 39 minutes 53 seconds. The time of flight for a Hohmann transfer would have been 119 hours from my calculations. I've done some research and found...

Can somebody give me some insight as to how I solve the following questions: 1) A rocket travels from the Earth to the moon(distance measured from Earth 380,000km) at a speed of v = 0.8c. (i) How long does the trip take according to an observer on earth? (ii) How long does the trip take...

What would happen if we try to set free the moon -theoretically- by applying a force just big enough to overcome its acceleration of a=2.7x10-3 m/s2 (~35km/h2) so that it's off its orbit. Would she settle on another orbit with smaller value of "a" or else ?

During a walk on the Moon, an astronaut accidentally drops his camera over a 14.7 m cliff. It leaves his hands with zero speed, and after 2.2 s it has attained a velocity of 3.3 m/s downward. How far has the camera fallen after 4.3 s? The Attempt at a Solution y= y0+vyot-.5gt^2...

During a walk on the Moon, an astronaut accidentally drops his camera over a 14.7 m cliff. It leaves his hands with zero speed, and after 2.2 s it has attained a velocity of 3.3 m/s downward. How far has the camera fallen after 4.3 s? I am so lost! I have no idea what to do! I would...

A certain pendulum clock that works perfectly on Earth is taken to the moon, where g = 1.62 m/s^2. Acceleration of gravity is 9.81 m/s^2 on Earth. THe clock is started at 12:00:00 AM and runs for 22 h. What will be the reading for the hours on the moon? answer in h T = 1 second g = 9.81...

[SOLVED] Ratio of net gravitational pull on moon A new moon is almost exactly in line between the Earth and the sun. A full moon is on the opposite side of the Earth from the sun. What is the ratio of the net gravitational force on the moon when it is new to when it is full? I tried...

Homework Statement on the moon the acceleration of gravity = g/6 if a pendulum has a period T on Earth what will its period be on the moon Homework Equations T = 2 pi sqrt(l/g) The Attempt at a Solution do you get... T / sqrt(6

Based on my title, I have the following questions: 1) What are all the challenges for man to go on the moon? 2) What are all the challenges for man to go on the Mars planet? I am mostly interested in what speed, what direction the shuttle is launched at? How much fuel is used in this...

[SOLVED] Gravitation & Escape Speed - Stone leaving Earth and reached the Moon. Hello everyone, I have one question on gravitation and escape speed. In the earlier part of the question, the minimum speed for the stone to leave the Earth is calculated and its final destination is the Moon...

Finding altitude on the moon (urgent) Homework Statement A projectile is launched vertically from the surface of the Moon with an initial speed of 1700 m/s. At what altitude is the projectile's speed 27% of its initial value? Homework Equations Kinematics, Conservation of energy...

Hi, I have recently been reading that the currently favoured theory for the origin of the moon is that a Mars sized object smashed into an almost finished earth, ripped off large parts of proto-Earth's mantle and the result debris coallesced into the Earth and moon again. I know the...

If the gravitational field strenght is weaker than that of earth, then less force is required to do a certain amount of work than required on earth. So my question is, Would our movements be faster? Like dribbling and hand movements and running?