The moon tag has no wiki summary.
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What is our estimated running speed on Moon's surface?
I was wondering if we have the chance to run on the Moon's surface, how would you expect it look like?
I expect our velocity will increase for the same work we do on Earth, but not sure if this will ...
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288 views
Strange things about new moon [duplicate]
I have some strange and infantile questions about new moon. I want to know how is it possible that the Moon is not visible at night and also at day it is not Sun eclipse?
I will explain the problem in ...
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1answer
81 views
Has anyone on Earth ever seen the dark side of the moon and if so where are the pictures? [duplicate]
If the Moon rotates then we should see the dark side right? But as far as I know the Moon only shows one side to Earth, how can this be if it is rotating?
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If the moon was rapid enough would it be able to orbit the earth from a close distance?
If the moon was close in orbit that it's surface was like 100 km away from the earth's surface. And it had a large enough angular velocity will it be able to hold orbit?
If this was possible, is ...
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1answer
57 views
Where can I search for high quality telescope images of Earth's moon?
I am developing a sensor calibration capability that compares a telescope lunar observation to a physics-based radiometric model. I'd like to find some high quality lunar images to test our ...
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2answers
82 views
Spot of my light on the moon
This is a funny question, but worth answering. The distance between the moon and the Earth is 384,400 km. The speed of light is 299792.458 km/s. It will take 1.3 seconds (Approx.) for my laser beam to ...
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1answer
32 views
What role has our Moon played in creating a persistent geomagnetic field?
The question comes from a comment by Mark Rovetta on my earlier question about the Earth's core going cold.
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3answers
262 views
Speed of the Moon
Why the motion of the Moon looks very slow in the sky? Doesn't it need the high speed in order to escape the earth's gravity?
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2answers
55 views
Re: recoil (bounce) of objects under varying gravitational forces
First, I don't have a strong knowledge of physics, so please forgive my lack of precision in defining my question.
Consider an airless free-fall situation where a steel ball and a balsa ball (with ...
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2answers
126 views
How does earth carry moon with it, if it can not force moon to touch it by gravitational force?
earth's gravitational force is acting on its moon in such a way that it forces moon to rotate round its orbit by centripetal force and carries it while rotating round the sun by gravitational force. I ...
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81 views
What can be the lightest possible moon launch vehicle?
I tried calculating this, but it gets too complicated.
Assume, we have a Moon orbit station and ISS on Earth orbit. We have a Moon base. We want to send a tourist for a week on the Moon and back. We ...
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2answers
139 views
Planet's Moon attrated by sun [closed]
I'm currently writing a code to generate solar system and $N$ number of planets / moons.
I use real data to test (earth / sun / moon data).
I succeeded in placing the earth and make it orbit around ...
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1answer
46 views
How do the “tidal forces warming moons” theories hold when apart from heating from expansion, there may be also cooling from contraction?
I can understand a temporary heating, from the tital forces exerted on the moon but wouldn't there be cooling as well eventually when particles "give in" to contraction? Wouldn't they eventually net a ...
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1answer
188 views
If the Moon had gravity as good as the Earth and a magnetic field could it have supported life?
If the Moon had gravity as good as Earth and a magnetic field could it have supported life? Because if the Moon had gravity, it could have retained water more than is present today on the surface.
...
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1answer
627 views
How can the Moon have such a strong effect on the ocean?
The gravitational acceleration on Earth is approximately $ 10 \mathrm{m}/\mathrm{s}^2 $. Compared to this, the tidal effect of the Moon's gravity gives a local variation in the acceleration of ...
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1answer
99 views
Can you tell just from its gravity whether the Moon is above or below you?
If you are on a place of Earth where the Moon is currently directly above or directly below you, you experience a slightly reduced gravitational acceleration because of Moon's gravity. This is what ...
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1answer
148 views
The Moon is slowly moving away from the earth. Does this mean that a total solar eclipse wasn't possible at some point in earth's history?
When the moon was closer to earth, was it still possible to witness a total solar eclipse millions of years ago? Or was the view-able space so small that it was impractical to even witness it?
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1answer
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Why does the moon sometimes appear out-of-place?
Quite often I go out in the morning and I'm in Milton Keynes, so I would expect the moon to rise in the east and set in the west. Sometimes at about 2, 3, 4 o’clock in the morning the moon is low in ...
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2answers
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What gonna happen to beer on the moon?
Let's assume that we have bottle of beer on the Moon. What would happen to it in sunlight?
Some cases:
Beer can be dark or lager.
It can be contained in glass bottle (transparent or dark) or ...
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1answer
245 views
What causes a ring-like image around light of the moon?
I just encountered an interesting image in sky.
As you can see in following images there was a ring-like image around light of the moon.
I don't know if it was clouds but it was looking like it is far ...
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1answer
51 views
How long in advance can dates of moon phases be accurately predicted?
When researching an article on Chinese New Year I found a few websites that predict the dates of Chinese New Year (CNY) tens - or sometimes even hundreds - of years in advance. I´m wondering how many ...
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475 views
Why does the moon look bigger at the horizon? [duplicate]
Possible Duplicate:
Why does the moon sometimes appear giant and a orange red color near the horizon?
Why does the moon look bigger at horizon or skyline than at other times e.g. at ...
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1answer
134 views
How long will our artifacts last in moon & space?
Given all the different space probes and equipment that have been either launched into space or lying on the moon. How long will they last before they get decayed into dust or some unrecognizable ...
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2answers
118 views
Moon and the moving train
While travelling by train (travelling West to East), it seems the moon is moving in opposite direction when seen from the window, but then it reverses its direction, after a certain amount of time and ...
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2answers
183 views
What kind of cooling mechanism could be used in outer space?
This question arises out of this question on Quora -
Apollo 11: 1969 Moon Landing: Did Neil Armstrong really land on the moon?
I'm convinced with most of the explanations provided in the first ...
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1answer
194 views
Did Aristarchus take the radius of the Earth into account in calculating the distance to the Moon?
My text says that Aristarchus (310 BC – ~230 BC) measured the "angle subtended by the Earth-Moon distance at the Sun" ($\theta$ in the figure below) to establish the relative Earth-Moon and Earth-Sun ...
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1answer
296 views
Would Titan moon blow up if you light a match?
Given that the atmosphere of Titan is mostly methane, and from a comment on this TED talk... Would it blow up from a lighted match-stick?
Seems like it's at least plausible. But, wouldn't the lack of ...
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3answers
164 views
The theory of moon creation when a Mars size planet hit Earth
As we know the predominant theory where does the moon come from is that a Mars size planet hit the earth and took a chunk out of it which eventually materialized into moon.
My question is that if a ...
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1answer
570 views
What happened to Apollo's Saturn-third-stage rockets?
I read recently the original Apollo 11 press release and it mentions that the Saturn V's third stage (used for Trans-Lunar Injection) was deployed into a solar orbit of some kind:
I know that on ...
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3answers
298 views
Why is Titan able to maintain an atmosphere, and not Luna?
I just read stability of hypothetical lunar atmosphere. From the correct answer, i understand, the low escape velocity from Luna is part of the reason it is unable to retain an atmosphere.
Titan ...
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1answer
108 views
Moons of the planets
What is the phenomena behind gas giants like Jupiter and Saturn having a large number of moons as compared to other planets. Were the present state moons a part of their parent planet long time ago ?
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1answer
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Apollo and orbital mechanics: orbital decay if the Trans Earth Injection (TEI) burn had failed
I'm reading Jim Lovell (Apollo 8 and 13) and Jeffrey Kluger's book Apollo 13, which is a fantastic read about a long past era I only have kindergarten memories of. On page 54 there is a paragraph that ...
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Why don't we see solar and lunar eclipses often?
Since we see the new moon at least once in a month when the Moon gets in between of the Sun and the Moon at the night and as far as I know if this happens during the day, you'll get to see a solar ...
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1answer
703 views
Why don't we see solar and lunar eclipses often? [duplicate]
Since we see the new moon at least once in a month when the Moon gets in between of the Sun and the Moon at the night and as far as I know if this happens during the day, you'll get to see a solar ...
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2answers
56 views
What is this shadow of the Sun on the Moon?
I was reading the article Moon Phases on HowStuffWorks. In the picture, each moon has a dark green area which represents the shadow of the Sun. How is this shadow formed and why is this important?
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Io - Turned inside out
In a lot of the descriptions of the moon Io it frequently states that the moon, because of volcanic activity, has been literally "Turned inside out". What exactly is meant by "Turned inside out" and ...
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1answer
162 views
Impact location that created the moon
I was reading an article today about the 1000th orbit of the Lunar Reconnaissance Orbiter, and as many of you know NASA created an animation that simulates the history of the moon. It is speculated ...
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1answer
147 views
Function to determine Earth-Moon distance vs. time
I had no luck trying to find a function that determines the distance between Earth and Moon versus time.
(Moon ground level to Earth sea level)
Accuracy:
the acceptable time range would be for ...
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0answers
58 views
Was Aristarchos' method to compute Earth-Sun distance ever rediscovered in medieval or modern times?
Ancient Greek astronomer Aristarchos who lived around 300 BC found a method to compute the Eart-Sun distance by applying geometry.
In this video about the cosmic distance ladder, at 26:30, Terence ...
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1answer
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Stability of moons around tidally locked exoplanets
Can someone send me pointers to work (either theoretical or simulations)
showing (in)stability of satellite orbits around tidally locked exoplanets?
I want to know firstly if satellite orbits can ...
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1answer
167 views
How to make a moondial?
A question came up on Outdoors StackExchange, How to tell time at night. I wrote an answer to that question, and in my answer I said that a standard sundial wouldn't work without some fiddling, but ...
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3answers
341 views
Why does the moon appear bigger close to the horizon, rising or setting? [duplicate]
Possible Duplicate:
Why does the moon sometimes appear giant and a orange red color near the horizon?
I made a little research about this and found this article ...
6
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2answers
226 views
Is it possible that I just saw Jupiter's moons?
Today at about 18:00 I was looking for Venus near the moon and I saw a short bright line. I thought that maybe I was seeing Venus' crescent but it was perpendicular to the crescent of the moon. I then ...
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5answers
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sun-moon-earth anomaly
When one looks at the sun and the moon in the sky together, why is it that the illuminated crescent of the moon does NOT "point" at the sun?
(More correctly the perpendicular bisector of the straight ...
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0answers
39 views
Does Celestia take the lunar orbit precession into account?
Does the lunar orbit plane rotate (8 year period precession)? Does Celestia take this into account while drawing the moon orbit?
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2answers
529 views
How can the date of lunar eclipses be calculated by hand?
How can the date of lunar eclipses be calculated? Especially without the aid of a computer.
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3answers
11k views
The Moon during the day
Why do we see the Moon during the day only on certain days and not every day?
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1answer
6k views
Is the moon a planet?
Can our moon qualify as a planet? With regard or without regard to the exact definition of the planet, can the moon be considered as planet as Mercury, Venus and Earth etc. not as the satellite of the ...
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1answer
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Polar ice deposits on the Moon - dispersed in permafrost loose rubble, or also massive/layered?
Water has been discovered on the Moon with remote sensing methods. Read the press release Diviner results indicate presence of widespread ice on the Moon on the "Diviner" infrared instrument on the ...
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1answer
42 views
Best observing techniques for a Total Lunar Eclipse?
Is there any good tricks to observing a total lunar eclipse that I should be aware of? Just wanting to know what to do to be prepared for the upcoming one, but please post in general for future ...
