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.

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How to calculate the maximum Elongation of Mercury seeing from the Earth?

I want to calculate the maximum Elongation of mercury seeing from the Earth but not by this assumption that its orbit is circle but it is an ellipse with semimajor axis a = 0.387 AU and e = 0.2 and ...
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Simulating solar system with Newton's law

I made a simulation in C++ with Newtons law and test it comparing the planets positions with the position from Solar system Calculator Don Cross (which I converted from JavaScript to C++) http://...
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Estimate the eccentricity of the Earth's orbit using equinoxes

I was reading the wikipedia article on Kepler's laws (https://en.wikipedia.org/wiki/Kepler%27s_laws_of_planetary_motion) and I came across the following. "The eccentricity of the orbit of the ...
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Is the orbit of Earth really closed? [duplicate]

So I know that Earth's orbit around the sun is elliptical (about there common center of mass) if we ignore the other perturbations in Newtonian gravity. Is the orbit of a planet around a star closed ...
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Is it possible to make a magnetic box that will compensate Earth gravity allowing magnetic objects inside to fly on orbits like in space? [closed]

Is it possible to simulate solar system using magnetic spheres and some kind of box that will compensate the Earth gravity by magnetic force?
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Would Newton's law in the solar system be independent from a presumed different fundamental gravitational law? [closed]

A thought experiment: Let's assume the gravitational field of a black hole without any neighbors would be stronger than the Schwarzschild metric in the Newtonian limit. Now, we let a solar system (sun ...
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Proof/explanation that Sun is bigger and more distant from Earth than Moon is, Middle Age technology allowed only

If I was living in the Middle Ages, how can someone prove or at least explain to me in a simple way that the Sun is bigger and more far from Earth than the Moon? Can a parallax be used for it? $$\text{...
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Suspension of magnet with a thread

Recently, I have read about magnetic poles of Jupiter. Peculiar thing is, that Jupiter has 3 magnetic poles. If you would suspend a magnet via thread on earth, it would align itself in geographic ...
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If our solar system and galaxy are moving why do we not see differences in speed of light depending on direction?

May be a silly and simple question, but I've been wondering if: The speed of light is constant, and When we're moving in the same direction (where both the emitter and the receiver move with the ...
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Are there any moons that exhibit a non-convex curvature in their orbit about the Sun?

In my answer at https://physics.stackexchange.com/a/266444/59023, it took me several iterations before David Hammen and others could help me understand why the Earth's moon's orbit about the Sun is ...
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Eccentricity of planets based on distance from Sun

Are the orbits of inner-solar system planets more circular than outer planets? Or is it the other way around? What's the reason for this? We were taught in our high school Physics class that outer ...
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Solar constant and Energy received by the Earth

I've been reading about black body radiation and I came across the topic of solar irradiance. If we consider the sun to be a perfect blackbody, then the intensity of the solar radiation at a distance ...
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Is it possible for an undiscovered, large object of the solar system to occult a star on the sky?

Is it possible for an undiscovered, large object of the solar system to occult a star on the sky? Maybe trying to discover it by gravitational effects is hard but can astronomers obseve a occultation ...
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1answer
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Why Earth is viewed crescent from moon when the Earth is experiencing total solar eclipse?

Suppose a person, let's say Neil, is on moon and Earth is experiencing a total solar eclipse so how should Neil perceive the Earth? This is also a question from KVPY (5/11/2017) question no. 22. as ...
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I am a bit stuck with the patched conic approximation for interplanetary travel between the Earth and Mars

I am writing an internal assessment for first year university on patched conic approximation. I am having some trouble calculating the departure angle from earth. This is because I have to calculate ...
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What is Earth's linear velocity around the Sun?

I am creating a theoretical model of the Earth's tangential acceleration around the Sun (on an elliptical orbit, not circular). First, I will build a theoretical model, which is not influenced by any ...
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Where I can find obliquity direction?

I can find axial tilt of planets easily, but that doesn't specify the direction of that tilt, i.e. planet's rotation axis may be anywhere in circle defined on a sphere by axial tilt value. And I can't ...
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How does the Sun's gravity affect the shape of the orbit of the Moon around the Earth?

If we look at the Earth-Moon system as a two-body Keplerian system, we would expect Earth and the Moon to orbit their center of mass (barycenter) in perfect ellipses, with the barycenter at one of the ...
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Combining Newtonian Gravity and length contraction from SRT?

The value of $\gamma$ that I will use is $$\gamma=\sqrt{1-\frac{v^2}{c^2}}$$ And length contraction is $$L_0=\frac{L}{\gamma}$$ Where all variables have usual meaning. Let the gravitational pull on ...
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When Sun was forming and before nuclear reactions inside the core what should have been its surface temperature?

When the Sun was forming and before all the nuclear reactions started inside its core, what should have been its surface temperature (only due to gas friction)?
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4answers
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Have I accounted for all relevant physics in my simplified three-body solar system model? [closed]

EDIT: Re-framed here to be more on-topic. I am building a model of a simplified, fictional sun-planet-moon solar system (not the real Sun-Earth-Luna system) to calculate astronomical events like ...
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Conservation of momenta in the solar system

I am writing a python program to simulate the universe and I had a question regarding conservation laws. As rightly stated in these answers, "Both are conserved if you consider the whole system ....
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What causes Saturn's hexagon hurricane? [duplicate]

Recently, Tien Nguyen JPL Fellow - Chief Engineer at NASA Jet Propulsion Laboratory, did share this photo that says "Cassini catches an awesome glimpse of Saturn’s north pole hurricane" I ...
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How do I calculate Earth's axial precession in an idealized Sun-Earth system?

I am experimenting with an idealized two-body system based on the Sun-Earth system. I want to calculate how much Earth's axis precesses and nutates given the simplified setup. In my system, the orbit ...
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Winds on gas giant planets: Would they increase if closer to their star?

The planets Saturn, Uranus, and Neptune are all primarily heated by their internal radiated heat, not by the Sun. Each of them have rotational periods shorter than that of Earth despite their much ...
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Effect of the Sun on the motion of bodies on the Earth

Does a body at the surface of the Earth fall at a slower rate when the Sun is at its zenith (that is when the side of the Earth that the body is on is turned towards the Sun and the body is directly ...
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If gravity is attractive, why doesn't the Milky Way contract?

Einstein introduced the cosmological constant because without it, one cannot get a static universe - gravity would cause the universe to contract. Given that, why is the Milky Way not contracting? For ...
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1answer
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Why the solar term gaps differ up to 1 day?

Solar term is any of twenty-four periods in traditional Chinese lunisolar calendars that matches a particular astronomical event or signifies some natural phenomenon. The points are spaced 15° apart ...
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Proving nearby planets are not antimatter [duplicate]

Observations of the universe make us think matter is much more common than antimatter, and I believe no "probably-antimatter planets" have been found. But, if Pluto, for example, somehow ...
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State of the art on relativistic perihelia precession in Solar System (other than Mercury)

The correct prediction of anomalous precession rate of Mercury perihelion is a classical test of General Relativity and one of its' big triumphs. How about other planets in the Solar System? ...
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If motion is relative, can we say that the Earth doesn't revolve around the Sun? [duplicate]

Considering motion to be relative, consider these two cases as follows An observer is standing on the sun and observing the earth and the earth has no background (no stars and stuff in the background)...
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If the Earth is constantly accelerating at 9.8m/s^2, according to General Relativity, won't Earth's speed be constantly increasing towards infinity? [duplicate]

As per Einstein's Theory of General Relativity, I understand that 'the Earth's ground is accelerating towards us at 9.8m/s^2. This is why we're falling towards the center of the Earth, as GR doesn't ...
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Is the radiation on IO's surface directional?

I know that magnetospheres redirect solar radiation into the poles of a planet, but since IO is in Jupiter's magnetosphere does that mean that solar radiation is redirected across the planets surface ...
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Is it possible to estimate the 23.5° tilt of Earth's axis?

Using the value of the precession of Earth's axis in 25,800 years and the value of Earth's radius, mass, moment of inertia etc., would it be possible to calculate/estimate that Earth's axis must be ...
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1answer
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In a 2-dimensional sense, how do the perihelions of the planets in our solar system line up?

A bit of background, I'm currently making a 2d graphical representation of the planets orbits around the sun with Python for a university project which currently looks like the picture below (not ...
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Does the Oort cloud act as a kind of shield for the Solar System?

Does the Oort cloud act as a kind of shield for the Solar System? When an interstellar object impacts the cloud, does its momentum get absorbed substantially?
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Is our solar system really that odd?

I have been learning about the solar system from popular science shows. In these shows they suggest that, after having seeing around 2500 other solar systems, astronomers have concluded that our ...
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After the discovery of the "unicorn" black hole, how likely is the Earth to be hit by a blackhole?

We know that the earth's chances to be hit by a blackhole before the death of the sun were practically 0 but how do the odds change after the discovery of the unicorn? About the unicorn: https://www....
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How can the mass of the sun be determined without using Kepler's law or gravitational lensing?

Can the mass of the sun be determined using the abundance of elements or alternative methods? It would be better to ask the question like this if we assume that I have an object that contains baryonic ...
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Gravitation in solar system [closed]

What would happen to Earth’s motion if the Sun’ gravity was magically turned off? Assume that there are no other objects around.
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Where can I find the true anomaly of the planets on Jan 1st 2000?

I am trying to code a simulation of the solar system. At present, all the orbits seem correct but I'm placing the planets at their respective periapses at the start of the simulation so the relative ...
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How can I estimate local solar time from direct solar radiation, knowing only latitude and longitude?

If I know the location (latitude and longitude) of a panel that measures solar radiation (in $\mathrm{W/m^2}$) and that it is at $0$ degrees to the horizon (i.e. facing skyward), can I estimate the ...
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Why do Solar Systems form in a disc shape? [duplicate]

This has been asked before, but I still don't get some points about all this. From what I've gathered so far, it's something like this: A molecular cloud with some initial spin starts collapsing due ...
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1answer
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Is there still an anomalous precession in Mercury's orbit that GR doesn't predict?

I was reading through the Wiki pages on tests of relativity and I was curious about this section. Am I interpreting it correctly? Is there still about $1.21''/\text{ cy}$ of precession (Total ...
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How much energy per area or volume is the solar wind producing?

Would it be possible to erect essentially a giant loop of wire in interplanetary space to create an electric generator? If so, how much power can we get?
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Is the Sun losing mass and pushing the Earth further away? [duplicate]

With the sun radiating so much energy every millisecond can nuclear fusion keep up with that pace? And if it can’t keep up isn’t the sun losing energy every second and therefor losing mass? Which ...
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Gravitational force time of application

Suppose I have the Sun, Jupiter and Saturn, and consider just the perturbations of Saturn on Jupiter orbit. I was wondering how much can it take to consider Jupiter orbit actually different from the ...
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Why does Grand Solar Minimum occurs?

Recently I was reading about the Little Ice age that happened in 13th to 19th century that caused mild summer and bitter winters ( also known as Grand Solar Minimum (GSM ). How did this occured?
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How are the layers of a solar cell stacked together?

Do manufacturers of solar cell use an adhesive to bind the n-type and p-type layers of a solar cell?? Or do they simply rely on the smoothness of the surfaces of the individual layers to contact each ...
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Why didn't the debris collapse back into the Earth at the time of Moon's formation?

The most accurate theory for the formation of our moon is the Giant impact hypothesis, which says that a Mars sized body collided with our early Earth and after this collision all the debris got ...

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