Questions tagged [the-moon]

Questions regarding Earth's only natural satellite. For questions about the natural satellites of other planets, use the tag [natural-satellite].

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1answer
523 views

How can I calculate when the new moon will be observed from a particular meridian?

I have read that Chinese months start on the day on which the new moon is observed from the 120th meridian east. From this I am assuming that the new moon is observable from there each time and that ...
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70 views

Appearance of the Cresent [duplicate]

Does the latitude of your position on earth change the appearance of the cresent like it changes the position of other objects visible in the sky? Does it rotate it?
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75 views

LLR & Orbital Motion

As I understand it, light that is emitted from a source is not imparted with the motion of the source and so always follows a "straight line". If this is correct, I am having a difficult time ...
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1answer
167 views

Around what apparent magnitude can the naked eye observe an object during full moon

For a very rough guideline using healthy/corrected eyes adjusted to the dark, around how bright should an object be to expect it to be visible?
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42 views

Lunar Inclination

Are there published tables for Lunar Inclination? I am interested because I believe this determines the degree of "Diurnal Inequality" of tides. There are tons of publishes tables of tides ...
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20 views

Waxing crescent moon [duplicate]

Would like to understand the visibility of the moon from an astronomical point of view of view. Is it possible for a waxing crescent moon to be visible in some countries while not being present in ...
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1answer
117 views

Where is the Moon for the last five or six days? [duplicate]

The date today is March 18th 2021 Thursday it's 6:00 p.m. I'm in the area of Sarasota-Bradenton Florida. I haven't seen the moon and it's been clear skies for roughly the last five or six nights... I ...
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24 views

Accelerations on the Moon due to its orbit and its spin

A gyroscope is placed on the equator of the Moon. It detects among others 2 accelerations: one due to the orbit and one due to the spin. What is the module of the second one compared to the first one? ...
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38 views

How does one go about naming a lunar crater? [duplicate]

Suppose I discover an uncatalogued crater on the lunar surface, and decide to name it. How would I submit my proposed name to the IAU?
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38 views

How do I calculate the elevation angle to the horizon?

I'm creating an app to visualize the southern area of the moon from a first-person perspective. I'm trying to determine if a point on the surface is a "checkpoint," where the elevation angle ...
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54 views

Astronomical events and Celebrations

In the past people celebrated important astronomical events and some of those events are still celebrated in some cultures and traditions. For example: March/September equinox, New Moon, Winter/...
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1answer
361 views

Precise declination of Moon

The moon follows 5.14 deg inclined path. the ecliptic and the Moon's path coincide are called 'nodes', and they travel around the ecliptic in a period of 18.66 years. Once every 18.66 years, the ...
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1answer
1k views

Does the new moon appear at the same time around the world or in one region last [duplicate]

My query is basically, say for example if the new moon is seen in the Middle east region, does it mean that it was the day of new moon in sub continental country as well ? You can't have a new moon in ...
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40 views

What is the degree of reflection of light from sun to the moon? [closed]

As Moon reflects the light from the sun it must have an ANGLE OF INCIDENCE and ANGLE OF REFLECTION... What Is the angle of reflection then?
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3answers
267 views

Why and how the Moon experiences only slight tidal forces [closed]

I understood the literal meaning of the red-underlined sentences, but frankly speaking, I don't know the processes. I mean I want to know how Earth's rotation makes a cycle of two high and two low ...
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1answer
78 views

Why the time that the moon orbits the earth is becoming shorter and shorter?

I read in past that the time that the moon orbits the earth is becoming shorter constantly? (0.3 seconds per 1000 years) and what is the simple astronomical explanation?
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1answer
547 views

Why is the shape of the Moon spherical? [duplicate]

The Moon does not rotate on its own axis. If I am right, for something to gain a spherical shape it has to rotate on its own axis. We know that the Moon does not rotate on its own axis. How can this ...
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1answer
980 views

Recurrence of Moon at Virgo's “feet”

A friend of mine saw a video that claimed the moon appears to be at the feet of the constellation Virgo about once every 17 years with its next occurrence being in September 2017. Is there any ...
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2answers
98 views

Sunset moonrise what happens in between?

Here in south London I have just seen that the sun will set at 16:45 hrs but the moonrise does not happen until 2hrs later 18:45 hrs what is happening in this two hour void, will it be too dark to see?...
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1answer
769 views

How moon north/south nodes can be calculated

If the planetary geocentric position of the moon is known (say, longitude "254°31'35"") is it possible to calculate such position for north/south (ascending/descending) moon nodes? Or what else needs ...
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1answer
2k views

Is it possible the Nebular Hypothesis and Planetesimal Theory are not correct? [closed]

For almost 3 centuries now the Nebular Hypothesis and Planetesimal Theory have become the preeminent explanations for how the Solar System and Planets evolved. Yet there is still no explanation for ...
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1answer
360 views

Why is the moon so large in this picture from Athens

I don't undertand why the moon can be that big a few hundred miles sout of where I am in London... And when I went to Greece, even Africa, the moon wasn't so large...
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32 views

Sun and moon on one side of sky [closed]

We can see sun and moon at the same timeninnsky but Can Sun and Moon be seen on the same side in sky any time ( same time) ever?
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1answer
219 views

Super moon or Super lag? [closed]

On Sep 25 2015 in California, at 8pm the moon was observed between 11 o'clock and 12 o'clock position in the sky. On Sep 26 at 8pm at the same location the moon appeared roughly between 11 o' clock ...
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1answer
101 views

Where is the Moon?

I live in Western Australia and I have not seen the moon for almost a solid week. Last I saw it it was almost full, and the sky has been clearer than ever with all the stars bright and visible yet the ...
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1answer
190 views

spin–orbit resonance, between moon and the earth

if this happens in the future what will be the consecuences of this?. Consecuences for the life or the climate conditions.
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193 views

Telescope question [closed]

During the daylight, you hold a ruler in a distance of 60 cm away from your eyes, and you find the size of the Moon to be 0.55 cm (try it yourself!). At night, you use a telescope to observe rock ...
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2answers
229 views

Why is the Moon's volume so small compared to the Earth's?

The Moon has 27.3% of the Earth's radius/diameter but only 2% of the Earth's volume. I don't quite get it why the Moon's volume is that small despite having more than a quarter the 2-dimensional size ...
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1answer
249 views

How far away does the Moon have to be until Earth doesn't feel its effects? [closed]

How far in miles does the Moon have to be for the Earth not to feel its effects?
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1answer
183 views

What is this object in this photo? [closed]

i took it and i don't know what planet or star is this and also there's our moon
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2answers
171 views

Moon trip in 1969 and temperature [closed]

The USA claims to have traveled to the moon in 1969. BUT... The temperature on the moon at day is 100 C and at night is -173 cold. How did the astronauts not die?? How did they survive?
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2answers
1k views

Is it possible for the Sun and the Moon to crash into each other? [closed]

Is it possible for the Sun and the Moon to crash into each other? If yes, under what conditions? If no, why?
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1answer
125 views

Given this report, you can see why people may think the moon landings were fake? [closed]

I was reading today that, in research published in The Astrophysical Journal, molecular oxygen has been discovered in the Markarian 231 galaxy, 561 million light-years from Earth. A light-year, which ...
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1answer
600 views

The Hollow Moon Story [closed]

I've heard on various programs (yes TV) with "supposed" experts in various fields that there is evidence which would suggest that the moon could be hollow. The experts ranged from scientists, sound/...
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1answer
391 views

What are the Gamma rays and Cosmic rays effects on humans and equipments? [closed]

First of all not to consider me a conspiracy theorist, but isn't landing on the moon a questionable issue? I am really not an expert in astronomy but let's assume that a moon landing has happened. 1- ...
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1answer
396 views

Why aren't people going to The Moon any more? [duplicate]

In 1969 America landed on the moon, and at that time our technology was not as good as it is now. So my question is, we have much more advanced technology than in 1969, so why are we not utilising ...
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1answer
367 views

Is it possible that Fly a Boeing 777 plane on Moon? [closed]

i always wondered that Is it possible that Fly a Boeing 777 Air Craft on Moon? if cannot how this moon lander's (Apollo) landing in Moon taking off from the moon?

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