Questions tagged [solar-system]

Questions regarding the Sun and objects orbiting it.

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35
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1answer
7k views

Considering our methods of exploration, how likely is it that there are unfound planets (not dwarf planets) in our solar system?

I think it's probably unlikely that there are more planets between Mercury and Mars, but out from Jupiter, there's lots of empty space between the planets. Could there be some small planet hidden out ...
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1answer
505 views

What is wrong with my calculations of Venus' orbital period?

I am trying to use Kepler's second law to find the duration of Venus's orbit. I am assuming circular orbits (using Earth and Venus, so low eccentricity). Here is my process: Assuming that the radius ...
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1answer
109 views

Solar series 142 and 147 started same year - series 147 and 152 will be ending same year. Why? Coincidence?

This question was left over from the last question I had, so I am asking it separately here: I have been looking into two solar eclipses (Saros series 147 and 152) that will both be occurring in 2021....
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1answer
167 views

What is a “semester series” for eclipse prediction? - Solar saros series 147 and 152

Yet again, I just stumbled across another baffling eclipse question (actually, two now). I was interested in two eclipses (Saros series 147 and 152) that will both be occurring in 2021. Each of these ...
2
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1answer
576 views

When did we discover that our sun does not orbit its own axis but a barycenter? [closed]

It's commonly known that the center of gravity of our solar system is not the suns axis, and, that the same goes for other orbital systems like Pluto and Charon, and so on. When was it discovered that ...
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1answer
1k views

What is the orbital period of our sun around its barycenter?

In years, what is the time it takes our sun to orbit around our solar system's barycenter?
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1answer
611 views

Could Planet Nine be a tiny black hole or an exotic compact object such that it escaped detection? What would its bounds be?

Planet Nine (a variant of the old X-Planet and Tyche-Thelistos hypothesis) proposes a super-earth planet at the edges of the solar system with a mass of around ten Earths. However, given the interest ...
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2answers
188 views

Cardinal directions in solar system?

Does the solar system also have cardinal directions? Which one is North and in what direction does it point?
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1answer
206 views

How is the term “solar system” defined? Could confirmation of a new planet lead to a change in this definition?

Voyager 1 (https://en.wikipedia.org/wiki/Voyager_1) is approximately 140 AU away, and is considered to have left the solar system. Now, the layman's definition of solar system provided by Google is: ...
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1answer
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Will comet 21P that just passed Earth on Sept 10 produce Draconid storm on Oct 9?

Comet 21P/Giaccobini-Zinner just made its closest pass to Earth and also made its Solar perihelion on the same day (Sept 10) which is roughly one month ahead of the annual Draconids meteor shower (Oct ...
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1answer
108 views

How dependent is Earth is with the other Planets' gravity? [duplicate]

How would the Earth be affected if the Moon was destroyed as far as our orbit around the Sun? What if Mars or Jupiter was destroyed?
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5answers
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Do astronomers have an established, systematic way for saying what does or doesn't orbit what? (e.g. “Mars orbits Earth”)

A recent comment An object far enough away can certainly orbit the Moon and the Earth (and the Sun) -- Mars, for instance does this. An object in the Earth-Moon L2 is also orbiting both the Earth ...
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Modeling planet rotations (time of day, obliqueness, etc.)

I created this solar system model using POV-Ray: by following these instructions: https://ssd.jpl.nasa.gov/txt/aprx_pos_planets.pdf The next thing I want to do is orient/rotate each globe correctly ...
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1answer
176 views

What is the closest candidate for Dark Matter currently?

I've both fascinated and frustrated after learning about the existence of Dark Matter. Can we find evidence of Dark Matter within our Solar system? What is currently the closest candidate for Dark ...
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1answer
467 views

Explanation of resonance stability and instability

I'm having some trouble grasping the idea of planetary resonances due to what seems to me like an ambiguity. It is known that the asteroid main belt is sculpted by the Kirkwood gaps, corresponding to ...
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1answer
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Why has there been no moon for 2 nights straight

I have been watching the sky all night for a week now I see flying stars everywhere well things that look like stars, what are they? And the moon has been gone for two nights now? Why?
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2answers
181 views

Why does Jupiter atmosphere does not get thinner on edges

Looking at Jupiter image the atmosphere edge of planet is very sharp as if it has solid surface which is not as it’s gases giant and there should be some thinning of atmosphere like we see around ...
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2answers
142 views

How to know the orbital and physical characteristics of the solar planets with only a non-professional telescope?

I have always been fascinated to see that with so little knowledge, scientists have succeeded in discovering the planets of the solar system, and have succeeded in defining them by their masses as ...
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0answers
164 views

Are Saros series separated by “40” in numbering related in any way?

Can anyone help with this question? My question arose from an eclipse related observation that I made while looking into lunar Saros series 129. It is the Saros series number for the lunar eclipse ...
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2answers
129 views

Is there a name for the star/supernova hypothesized to have been a precursor to the Solar System?

I found an article suggesting a supernova injected debris which helped nudge the formation of the Solar System 4.5 billion years ago. I couldn't find a name for this hypothetical star/supernova after ...
7
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1answer
172 views

Are there any natural satellites in retrograde Sun orbit?

As I watch the video of the asteroids being discovered, all I see is prograde orbits. Their prevalence is fully understandable and justified, but the Sun gets interstellar visitors occasionally and I ...
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2answers
153 views

How does the gravity of one planet affect the velocity of other planets?

If there was a massive enough planet outside of earth's orbit to affect it, how would the earth's velocity change? I know it would be small, but would the velocity increase or decrease?
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1answer
666 views

Simple mathematical models of solar systems

I’m a hobbyist programmer with a profound love for procedural content generation. I’m working on a 2D space exploration game and while it’s not meant to simulate anything real, I’d like to give it a ...
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2answers
174 views

The Sun's composition is based on the currently assumed composition of the giant planets [closed]

I posit that the giant planets comprise methane gas hydrate (CH4)8(H2O)46). If so, would not the Sun have to have a large composition of oxygen?
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1answer
120 views

Are large body orbits self correcting?

If a rogue planet disrupts Earth's orbit slightly to cause a long winter or summer will the Earth's orbit normalize back close its original orbit over time? Could a Planet X or some other elliptical ...
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1answer
159 views

What are the problems that need to be taken in consideration when trying to find planetary position by using jpl ephemerides?

I'm currently trying to determine the position of the sun and the moon from jpl ephemeris DE200 which is referred to the dynamical equator and equinox of 2000 and uses tdb time. I am using the j2000 ...
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2answers
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Why does each and every planet of our solar system have an unique axial tilt angle?

Why do planets have an axial tilt? From the above image we can see that each planet's axial tilt angle varies and differs from the others. What was the cause of this, was this from the beginning of ...
4
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2answers
213 views

Hypothetically, if the sun stays the same size forever, when will the Earth fall into it?

Hypothetically speaking (once again), if the Sun stays the same size forever (i.e. it somehow maintains a stable hydrogen supply and the helium product just disappears), how long would it take before ...
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1answer
101 views

Is the age of the solar system equal to the age of meteorites?

I've read articles that state the age of the solar system has been determined by measuring the amount of decay of isotopes in some meteorite, which has demonstrated that the lead isotopes in the ...
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6answers
235 views

Would things be exactly the same if the Sun was orbiting the Earth and the Earth was in the center of the Solar System?

Would things be the same if the Sun was orbiting Earth and the Earth was in the center of the Solar System, or would there be any big difference? It seems like why people before thought the Earth was ...
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1answer
681 views

Are the planets in our solar system in free fall?

If I’m correct, the International Space Station is in free fall, but is moving fast enough to keep it’s position. Assuming that is true, does that mean that some/all planets orbiting the Sun are in ...
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1answer
70 views

Any programme that shows actual planet information?

I don't know if this question should be here, if it shouldn't just let me know. My question is, I'm programming in Java and I want to get the actual stats of the planet, like orbit ,actual ...
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2answers
527 views

Does the relative motion between planets other than Venus and Earth form shapes such as the Flower of Venus?

I was reading about the Pentagram/Flower of Venus, and how it is caused by a 13:8 ratio between their orbits. I found this GIF particularly fascinating. My question is, if the ratio changed, would ...
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3answers
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How did the authors of Surya Siddhanta find the diameters of other planets in the solar system?

The Surya Siddhanta, "a Sanskrit treatise in Indian astronomy from the late 4th-century or early 5th-century CE" is truly a great work. But how was it possible for the writers to find the exact ...
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0answers
36 views

Does center of gravity of Solar system influence intensity of space rays reaching earth, space dust, speed of earth rotation?

I found an interesting article, claiming very interesting things. But I cannot find any trust-worty sources confirming such bold claims. Maybe someone came across some solid proof? 1) Center of ...
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1answer
351 views

Direction of Earth’s poles relative to the Sun’s movement around the Galaxy

The plane of the solar system is at 63 degrees to the plane of the galaxy, then either the North or South Pole of Earth would be on the ‘leading edge,’ i.e. pointing roughly in the direction of ...
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1answer
847 views

How would one calculate the synodic period between 3 planets?

I don't know if this is the correct term, but how would one calculate the time it takes for 3 planets to lie on the same line?
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2answers
67 views

Mass accumulation rate and orbit-time of earth

According to me following reason of mass accumulation of earth has been completely overlooked so far. The sunrays that fall on the oceans travel deep into water and finally get converted into mass ...
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1answer
2k views

Why do Uranus and Neptune have more methane than Jupiter and Saturn?

So the standard theory of the solar nebula is that in the region of the gas planets, ice and rock could condense to form planetesimals, which could then accrete hydrogen and helium to form the gas ...
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2answers
662 views

Why are the planets moving? [duplicate]

My question isn't why it doesn't have a circular orbit, and why an elliptical, my question is why do they move at all? What caused the debris in space to apply such a force on the planets that it has ...
2
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2answers
728 views

Do other planets affect the Earth?

Let say Mercury, Venus, the Moon were all in alignment between the Earth and Sun. They are all closest to each other in respective elliptical orbit. On the other side of the Sun you have the rest of ...
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5answers
691 views

Why is sun's photosphere a million times less dense than air at the surface of the Earth?

Sun's photosphere is about 19 times as hot as Earth's surface. (Source: http://solar-center.stanford.edu/vitalstats.html) But Solar surface gravity is about 28 times terrestrial surface gravity. So,...
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2answers
423 views

How can I calculate solar intensity at Saturn

I'm trying to work out how big solar panels have to be for a Saturn probe, but can't find any data for solar energy at Saturn.
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1answer
184 views

Venusian polar surface temperatures

I've stumbled across several articles about how the Venusian polar high atmosphere is really cold. What these articles appear to fail to specify is what the surface temperatures of the poles are. I am ...
4
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3answers
350 views

What would a terraformed Mars look like from Earth?

Question in the title. Currently, Mars is a small orange dot in the sky. But what if green, blue, and some white were added? I wouldn't expect it to be too different- a large portion of it will remain ...
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0answers
50 views

Why stars are not visible in photos of Planets from space [duplicate]

The night sky from many parts of the Earth, away from any city lights and pollution, is full of starts, mostly the stars of the Milky Way Galaxy is what fills the night sky densely. In many photos of ...
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1answer
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Why do stars twinkle but the Sun doesn't (I'm asking this because the Sun is also a star) [duplicate]

My friend asked me "Sun is also a star then why doesn't it twinkle like other stars" I brought this question here so that I have (and have more) infomation on this topic.
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0answers
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Detecting the Chicxulub impactor, right now [duplicate]

Say an asteroid identical in all ways to the Chicxulub impactor (size, mass, materiel, orbital type, etc) was about to hit us. (Again!) As of exactly early 2018, given our known instruments and ...
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1answer
85 views

Can the shedding of radiation of stars contribute to the red-shift of the universe?

The sun is losing mass(1.5cm per year) by emitting radiation and the orbits of the planets are widening because of the weakening gravity of the sun. Are most of the stars shedding mass via ...

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