Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [solar-system]

The Sun plus the collection of bodies in orbit around the Sun such as planets, dwarf planets, moons, asteroids, comets, etc.

4
votes
0answers
98 views

What is novel about the analysis showing that Mercury is “closer” to Earth than Venus?

Why is the recent analysis showing that Mercury and not Venus is on average the closest planet considered new? This should surely come as no surprise to anyone who has ever looked at a plot of the ...
0
votes
0answers
23 views

Is it possible to approximate the solar radiation output for each hour of the day with the total output in a day?

If you know the total irradiance received by the sun during a single day, could you approximate how many irradiance each hour you get if you assume it was a clear day? I am able to calculate the ...
-1
votes
3answers
106 views

Orbit such that distance from Earth is always the same as distance from Mars

Would it be possible to place a satellite into an orbit such that its distance from Earth and Mars always remained the same? That is the distance between the satellite and Earth and the satellite and ...
0
votes
2answers
45 views

Why are the seasons reversed between the northern and southern hemispheres? [duplicate]

Why is it winter in the north when it's summer in the south, and vice versa? I know the standard answer to this question is "because of the Earth's axial tilt, at a point in the Earth's orbit where ...
0
votes
0answers
32 views

A confusion between geocentric and heliocentric model [duplicate]

As per Ptolemy, he proposed firstly geocentric model and that model if one see with aspects of relativity he would find true. Here is an example how Suppose you are in a train which is moving and you ...
2
votes
1answer
82 views

'Harmony of the Spheres' or 'Harmony of the World' - is it debunked? [closed]

I sincerely apologise for this vague question but I'm writing an essay for my music class on musical harmony and it's historical origins. I came across the Pythagorean notion of Harmony of the Spheres ...
0
votes
5answers
102 views

What is holding things like the Earth and the Sun in one dimension?

I was thinking last night: for most of my life I’ve been taught that the planets in our solar system orbit the Sun, which insinuates that the Sun is in a fixed point in 3-dimensional space, and that ...
1
vote
1answer
27 views

The shape characteristics of gravitational wells given different masses and spread of objects

I am curious as to research that calculates the shape of gravitational wells, and their limits, and affect on time, for different masses and spread of mass. The actual question is st the end. For ...
2
votes
1answer
42 views

Solar System Position and Velocity data

I'm trying to create an nbody simulator and to test it I'd like some real world data. A good test would be the solar system. I've come across the JPL Horizons software but if cant seem to figure out ...
8
votes
3answers
896 views

Gravitational advantage of outer planets in war

The Expanse books cover a lot of aspects of war in a situation where humans inhabit many planets and moons of the solar system. The author makes the point that, in a war situation, the outer planets ...
2
votes
1answer
107 views

Why is ʻOumuamua traveling so slowly?

Imagine a space rock that starts at rest at the Lagrange point between the sun and our nearest stellar neighbor, Alpha Centauri. That would put it at about 2 light years away from the sun. Now, it ...
3
votes
2answers
94 views

Relativistic space rocks. Are they possible?

I was thinking that the Universe is full of extreme events. Colliding galaxies, exploding stars, colliding planets (like in one of models of our Moon formation), colliding black holes... Can it be ...
4
votes
1answer
55 views

Speed of solar system through dark matter halo

How is the speed of the solar system through the dark matter halo determined? Direct dark matter detection experiments rely on this speed estimate. Assuming the sun/earth travel through the dark ...
1
vote
1answer
27 views

Gravitational/electromagnetic effect of planets on solar activity?

Does the gravitational and/or electromagnetic influence of planets have any effect or correspondence to solar activities (e.g. solar flares/CMEs) - and if so, does the planetary position (where they ...
3
votes
1answer
38 views

Transit of Venus and the computation of the Atronomical Unit

I have searched for the computation of the AU. The two best websites I found about it were https://sunearthday.nasa.gov/2012/articles/ttt_75.php How did Halley calculate the distance to the Sun by ...
0
votes
1answer
71 views

Calculating the Earth-Sun distance

Using just the facts that the period of earth around the sun is 1 year. that the distance of 1 degree of latitude on earth is 100km . that the acceleration due to gravity on earth is 10m/s^2 and that ...
3
votes
1answer
96 views

Where in the solar system could we place a clock, such that it would run the fastest (relative to a clock on Earth)?

I know that time dilation occurs between two reference frames with differing velocity, or differing positions in a gravitational field. Many examples that illustrate this point involve things like ...
1
vote
3answers
281 views

Why is angular momentum of the Earth/Moon system conserved?

Why is the angular momentum of the Earth/Moon system conserved, apparently unaffected by external forces such as force of the Sun?
3
votes
2answers
130 views

Why do all the planets and stars in our solar system have such similar average densities?

This table lists the average density of all the planets in our solar system. We could also consider the Sun (average density 1.41 g/cm³) and Pluto (average density 1.88 g/cm³). The densest body (Earth)...
2
votes
1answer
65 views

Distortion of the Earth's magnetic field due to solar winds?

Why and how do the solar winds distort the Earth's Magnetosphere to form a drop like shape facing away from the Sun?
4
votes
1answer
2k views

What are modern solar system applications of GR where approximation methods fail? [closed]

It is often stated that general relativity (GR) provides the most accurate description of gravitational phenomenon. In most undergraduate and even graduate textbooks this idea is reinforced by ...
0
votes
1answer
128 views

Speed of sound at the Sun surface [closed]

The gas velocity at the Sun's surface is subsonic and At 1 AU from the sun, the solar wind is supersonic. Like Parker wind solution. Why the velocity at the Sun's surface is subsonic? (In the ...
6
votes
3answers
131 views

Do any of our satellites or space exploration craft need or use relativity for strictly navigational purposes?

I thought I read somewhere that everything we've ever sent into space used only Newton for navigation, because relativistic effects are orders of magnitude smaller than other causes of course ...
1
vote
1answer
73 views

Why does not the Moon escape from the Earth? [duplicate]

We know that Gravitational Force that is applied by the sun on the moon is greater than that by the earth on the moon. My Question is then why does not the moon escape from the earth and go towards ...
1
vote
1answer
50 views

What would happen to the Moon if the Earth stopped providing it with a centripetal force owing to its force of gravity?

Would the Moon really only travel in a straight line then? What about the other planets and their forces of gravity? Wouldn't they prevent this rectilinear and undisturbed motion of the Moon?
34
votes
5answers
4k views

Can the Schrodinger equation describe planetary motion? [duplicate]

I was asked on an exam whether the Schrodinger equation can be used to describe planetary motion and my answer was "No, because the solutions are wavefunctions which give probabilities but everything ...
0
votes
2answers
62 views

Effect of Change in Mass on Planetary Motion [closed]

How would a change in the mass of a planet in the solar system affect its orbit? For example, if hypothetically the mass of Mars were doubled, would it [a] move closer to the Sun, [b] move further ...
1
vote
1answer
141 views

Rotation rate of Mercury vs. a day on Mercury

In the latest episode of Last Week Tonight (June 3rd), John Oliver says a day on Mercury is 1,407 earth hours (58 days and 15 hours), which is correct. Neil D. Tyson says The time you gave is ...
0
votes
0answers
26 views

What is the relativistic correction for the period of the planet Mercury? [duplicate]

The classical formula of the period of the Kepler orbit is given my $2\pi a^{3/2}/(GM)^{1/2}$. Here $G$ is the gravitational constant and $a$ is the length of the semi-major axis and $M$ is the solar ...
1
vote
3answers
296 views

Computerised Solar System Simulation [closed]

In school I am doing a project where using python I simulate the solar system The physics I know so far is newtons laws and Kepler’s laws and I have done a lot of research but there appears to be ...
0
votes
1answer
42 views

Why do the sun and planets differ in their chemical elements composition?

The chemical elements composition of the sun changes as its nuclear furnace changes elements into heavier ones. But it is supposed to be mostly Hydrogen at the start. The planets are too cold for ...
0
votes
2answers
74 views

Proof against Tychonian model by view from Space

No earth-based observation of the planets can disprove the Tychonian model (planets orbit sun, which orbits the earth). It takes very fine stellar observations, which couldn't be done in the 17th ...
3
votes
4answers
77 views

Does the photons of light have an effect the movement of solar planets

In space, solar sails are used in order to move some space exploration crafts. Since in space there is vacuum the slightest force could be enough to propel and move the craft. Although the earth is ...
1
vote
0answers
41 views

Which planets would be visible from the Saturn system using the Naked Eye?

I was wondering which planets would be visible using the Naked Eye from Saturn? Would these planets always be visible or disappear as they got further from Saturn? Plus which planets wouldn't visible ...
0
votes
1answer
89 views

Is Gravity Cumulative

This is to tie in with a previous question >The Sun's Orbit - Is it What We Think? Are gravitational waves cumulative? and if so how does this affect our galaxy and other astronomical bodies? Now ...
1
vote
2answers
67 views

Can we calculate the speed and time period of Earth's revolution around the Sun using general relativity?

From General relativity we know that the sun's mass causes the spacetime to dip, so can we theoretically calculate the exact the time period and speed of earth's revolution around the sun using a ...
4
votes
2answers
177 views

The Sun's Orbit - Is it What We Think?

I was thinking that the sun must orbit something within our spiral arm in the Milky Way, or be affected by other astronomical bodies - surely not just the supermassive black hole centre. I have ...
3
votes
1answer
69 views

Is it possible to derive curvature of spacetime from EFEs to create a computer simulation of the solar system? [duplicate]

Background I am a professional scientist (biologist), statistician and a computer programmer, but an amateur physicist so pardon me if this question appears silly. In order to understand general ...
1
vote
1answer
73 views

Is there a Neutron Star or Black Hole close to solar system?

I recently read an article where it mentioned that the solar system could be born out of a supernova explosion (death of a previous star). In case there was a supernova, wouldn't there be a ...
-1
votes
1answer
42 views

What happens in between planets?

I was wondering in an area of space where there arent enough planets around it to suck an object in with gravity, does the object just float there? And if it does just float there will other objects ...
4
votes
2answers
330 views

Stellar aberration in a water-filled telescope

I read that when the stellar aberration of light is measured with the help of a telescope filled with water, the value of the aberration is equal as in the case of a telescope filled with air. Just ...
0
votes
0answers
21 views

How do planets rotate around a star? [duplicate]

I did not know how to ask this question correctly so i made two little drawings to explain my question, but to try to explain it to my best extent. Do planets rotate around a star all on the same ...
2
votes
1answer
27 views

Can the collision of asteroids form another moon?

In the lifetime of the earth, is it possible for sufficient collisions to occur in the asteroid belt to form a prototype moon?
1
vote
0answers
38 views

Calculating spacecraft thrust manoeuvres with JPL data [closed]

I've recently programmed an animated simulation of the main elements (core planets and Sun) of our solar system: by using the initial coordinates from the JPL (Jet Propulsion Laboratory - NASA) ...
15
votes
3answers
3k views

Minimal velocity to throw an object to the Sun

What is the minimal velocity to throw an object (material point) to the Sun from Earth, with no specific restrictions?
2
votes
0answers
150 views

What do the planets in our solar system smell like? [closed]

For example, if Jupiter is mostly hydrogen and and helium, but has ammonia clouds, does that mean it smells like a cat's litterbox? Does Mars smell like iron? Asking in order to give kids a more "...
1
vote
0answers
136 views

Where did Paul Gerber go wrong in arriving at the same equation as Einstein in explaining the Mercury anomaly?

We know that Einstein admitted that Paul Gerber's 1898 formula explaining the anomaly of Mercury's perihelion was the same as his own. Reportedly Gerber had made a mistake somewhere, so - even though ...
11
votes
2answers
2k views

Voyager: Is it in “orbit” and will it return?

This Phys.SE question about Voyager got me thinking, and I didn't see an answer: Gravity - what goes up must come down. Will Voyager, in its current trajectory ever be pulled back into our Solar ...
25
votes
1answer
5k views

Why is Voyager 1 approaching Earth? [duplicate]

When I read JPL's mission status for Voyager 1 and Voyager 2 the distance between Earth and Voyager 1 is decreasing. Is it right?
0
votes
1answer
88 views

Does the moon rotate around the earth-moon axis?

It is well known that the moon always shows the same side to the earth. But does the orientation of this side change? I.e. does the moon rotate around the moon-earth axis?