Questions tagged [solar-system]

Questions regarding the Sun and objects orbiting it.

Filter by
Sorted by
Tagged with
1
vote
0answers
49 views

Is the angle of the Earth's orbit on the Galactic plane changing (towards 180 degrees)? [duplicate]

Currently the angle of Earth's orbit is aroun 60 degrees on the Galactic plane. But is this angle changing?
1
vote
1answer
68 views

Precision in the measurement of the distance to the Sun

How precisely can the distance to the Sun be measured? Wikipedia says the distance to the Moon can be measured upto millimeter precision. But Wikipedia article on distance to the Sun says only about ...
0
votes
0answers
95 views

If the hypothetical planet beyond the Kuiper belt exists, is it likely there are even more planets farther outside?

Since 2016 there are hints that a (probably) ice giant planet may exist far beyond the Kuiper belt. There are speculations that it may be a rogue planet captured by the Sun. But is it likely that ...
3
votes
0answers
44 views

What is happening with these solar particles detected near the Sun that is so newsworthy?

Phys.org's Team identifies low-energy solar particles from beyond Earth near the Sun links to the open access ApJ article Properties of Suprathermal-through-energetic He Ions Associated with Stream ...
5
votes
1answer
945 views

What does the Sun look like from Eris at its aphelion?

At its aphelion (most distant location from the Sun) the outermost-known planet Eris is about 100 times as far from the Sun as Earth. What does the Sun look like from Eris' surface? Is there still a ...
4
votes
1answer
98 views

Peculiar Amplitude of Earth's Orbit in Z Axis

I'm currently building an N-body simulator for my masters project and I'm using JPL's Horizons system to compare against. I started with just a couple orbits and everything seemed to be working ...
0
votes
0answers
24 views

How was the Messenger spacecraft used to measure Mercury's orbital precession to such accuracy? Could this have been done using radar?

This comment under an answer to Path of Mercury and general relativity mentions that the Messenger spacecraft was used to measure the precession of Mercury's orbit to such accuracy that the tiny ...
4
votes
1answer
142 views

How is the Gould Belt younger than the sun?

Our sun is located in the Gould Belt, a group of stars which is thought to be 30 - 50 million years old. However, the sun formed 4.6 billion years ago. Did the belt form around us?
3
votes
0answers
44 views

Is there any planet or satellite in the solar system in the process of getting tidally locked?

According to Tidal locking The effect arises between two bodies when their gravitational interaction slows a body's rotation until it becomes tidally locked. Over many millions of years, the ...
0
votes
0answers
39 views

Who first named the planets Mercury, Venus, Mars, Jupiter, and Saturn? [duplicate]

Who first named the planets Mercury, Venus, Mars, Jupiter, and Saturn? Agnes Clerke's Catholic Encyclopedia article "Astronomy in the Bible" § Planets claims that "Venus and Saturn are the only ...
6
votes
1answer
89 views

Is there a verification of the solar system barycenter as it is theoretically determined?

The barycenter of our solar system is not the sun, but a changeable location outside of the center point of the sun. A often used diagram of that relation is shown below, originated from the Wikipedia ...
4
votes
2answers
115 views

Where can I find Helium 3 in our solar system?

What are the best locations within the solar system to find Helium 3 excluding the Sun? Where is Helium 3 most abundant after the Sun?
0
votes
0answers
17 views

X-rays, Solar wind and Sun's corona

I was reading that Solar corona emits the solar wind however also X-rays. What is the difference during the creation of these effects and impacts on our atmosphere? Thank you!
0
votes
1answer
35 views

For any given meteor shower in a given year (e.g. Quadrantids, now) where can I see a rough prediction of how many days it will last?

For a given shower the rate hitting the Earth's atmosphere versus time is usually a peak with a width of a few days, though there are some exceptional unicors. Is there a place where I can view this ...
3
votes
1answer
55 views

What is the current angle of motion of the sun with respect to the Galactic Plane?

I understand that the solar system oscillates in its motion around the Milky Way. However at any given time, there must be a specific angle between the current direction of the solar apex and the ...
-1
votes
2answers
87 views

Visibility of a planet on the other side of the Sun

Context: I've been having a discussion with my vectors and mechanics professor (course Mathematics BSc) about a problem on a recent coursework. The following is the model I came up with. I'm not an ...
0
votes
0answers
38 views

Skyfield Subpoint() usage

Is subpoint() in skyfield used for finding subsolar point?, i cant find examples in this link subpoint. How can i use it to find ...
2
votes
0answers
49 views

Does the axis of solar system precess during it's motion in the Milky way galaxy?

The plane of solar system makes an angle of 60° with the plane of galaxy. So, the axis of solar system should make 30° angle with the galactic plane. Like the axis of Earth precess over a long period, ...
0
votes
0answers
21 views

What is the typical chemical composition of the most common asteroid types?

I'm trying to make a semi-scientific accurate game where you can find/mine asteroids. I want the composition of asteroids, and how common they are to be correct. Or at least as close to correct as ...
-1
votes
1answer
46 views

What's the difference between semi-major axis and apoapsis?

The semi-major axis is half of the diameter of the major axis of an ellipse by definition. So how does that make it any different from apoapsis, the furthest point an object is from a parent body in ...
1
vote
1answer
34 views

Delay of Moon passing a defined meridian each day

On the website Lunar Synodic Curve a nice image of an Moon analemma is shown together with an explantion on the reason why for the different phases of the Moon the images have to be taken with 24h ...
0
votes
1answer
108 views

Could Planet Nine be much smaller than thought previously?

In 2016, Caltech astronomers began testing a Planet Nine hypothesis to explain the eccentric and inclined orbits of distant dwarf planets such as Sedna, 2015 TG387, Niku, and 2012 VP113. The ...
3
votes
0answers
37 views

Why do CME's “zig-zag” on their way to Earth?

This answer states: A single CME will impact a spacecraft from only one direction, but that direction might not be directly from the sun because a CME may zigzag en route. Looking at that link, ...
4
votes
3answers
139 views

How long is the Sun closer to Earth then Mars is?

A recent question at Space.se has generated a few comments that are interesting. But the answer to one particular comment to might address a lot of misconceptions. I imagine the actual halfway ...
6
votes
2answers
126 views

what is the resolution of the magnitude that is distinguishable to the naked eye?

Or is it possible to spot the changing brightness (magnitude) of a planet with a naked eye The context of the question is this: If I'm not mistaken Ptolemy was able to say (using observation alone) ...
5
votes
1answer
86 views

Can we use Breakthrough Starshot spacecraft to detect any unknown massive object in our solar system?

For example, the hypothetical Planet Nine. Since we just want to prove or rule out the existence of Planet Nine in our solar system, we can avoid most of the technical challenges for StarChip (camera ...
3
votes
1answer
109 views

What is the distance between the solar systems towards the center of galaxy?

The distance from our Solar System to the nearest is roughly 260,000 AU. I am wondering what is the minimum distance between two Solar Systems. Since the center of our galaxy is supposed to be more ...
1
vote
0answers
54 views

Does plasma recombination in the solar wind happen to any significant or measurable degree?

Comments below this answer to Why does the Solar Wind consist of charged particles? have led me to ask the following: Question: Does plasma recombination in the solar wind happen to any significant ...
6
votes
1answer
3k views

Starting a fire in a cold planet that was full of flammable gas

What would happen to a cold planet that has a large amount of flammable gas, like Neptune, if we throw some fire into it? Will it burn, or would the flame be extinguished due to the cold?
1
vote
2answers
217 views

Can fish and other sea creatures survive in watery planets like Neptune or any other planets that has water?

I'm a bit curious since Neptune does not have a land surface and it is covered with water, I mean water has oxygen right? What will happen if we put some sea creatures in these watery planets? Can ...
3
votes
1answer
94 views

How was Cassini able to measure and use the Earth-Mars distance to get the Earth-Sun distance?

How was Cassini able to measure and use he distance between Earth and Mars to get the Earth-Sun distance? How were the ratios of Earth-Mars and Earth-Sun calculated then? Given Kepler's laws all we ...
5
votes
2answers
117 views

How would a small nearby black hole be detected and confirmed as such?

This article suggests that there might be a tennis ball-sized black hole orbiting the Sun somewhere beyond the orbit of Neptune. According to the article, observational anomalies of trans-Neptunian ...
19
votes
2answers
3k views

How do we know Nemesis is not a black hole (or neutron star)?

Nemesis, the hypothetical "death star", is supposed to be a massive body that orbits the Sun at long distances and periodically sends comets from the Oort Cloud into the inner solar system. These ...
2
votes
2answers
120 views

Estimate prevalence of ʻOumuamua-style interstellar obects inside Jupiter orbit now that C/2019 Q4 (Borisov) is found?

Now we know two of them, so maybe it's not an outlier. We have two points so we can draw a line. How many similar macroscopic objects should be zipping through space at ~30 km/sec so that we would ...
3
votes
1answer
100 views

Where would an object fly to if it were to leave the gravitational field of Earth? And would it stop somewhere? What would happen to it?

My 3,5 year old son is asking :-) He can take answers for a 15 yo I think. Many thanks for your help!
2
votes
2answers
118 views

Are there any planets or objects orbiting in Goldilocks zone?

I was wondering whether there were any objects that orbit the "goldilocks zone" besides our home planet earth, and how the goldilocks zone of our solar system is defined.
5
votes
2answers
152 views

What is wrong with this measurement of the synodic period of Mercury?

I'm measuring the synodic period of Mercury using Stellarium. When measuring the synodic period one needs to choose a reference point to start the measurement, and I choose the point when Mercury is ...
5
votes
1answer
76 views

Textbook to explain measurements and calculations for heliocentric solar system

I'm trying to identify a textbook I had briefly and then lost. I had a PDF file of an astronomy textbook, but the hard drive crashed irreparably before I could thoroughly read the textbook, or even ...
4
votes
1answer
101 views

Are there any simulations of the Grand tack?

The BBC program with Brian Cox "The Planets" involved some description of the Grand Tack hypothesis to explain the current state of the solar system. This theory has Jupiter wandering through the ...
6
votes
1answer
135 views

Planets positions (azimuth, altitude) API

I'm looking for a simple API that will allow me to get positions of planets and the moon for a given date, location and time. Does anyone know an API like that? Any suggestions or alternatives would ...
1
vote
1answer
199 views

View of other planets from the Earth

There appears to be varying positions/spots of view of other planets from Earth, if I'm not wrong. Now, given that all planets are on the same plane, why do their positions change on the night sky for ...
1
vote
1answer
123 views

How thick was Earth's primordial atmosphere?

Earth's first atmosphere was made of hydrogen and helium accumulated before fusion started in the Sun. As soon as this happened it was stripped away by the Sun. How many atm of hydrogen and helium had ...
4
votes
0answers
61 views

When was it realised that most major moons orbit in the equatorial plane of their parent planets?

Inspired by the discussion of the moons of Uranus providing a clue to the planet's axis of rotation in this question, I'm wondering when it was realised that the major satellites are typically located ...
4
votes
2answers
158 views

Tycho Brahe's model

Tycho Brahe made a model of universe where earth is at the centre and motionless whereas all other planet orbited around the sun. I am interested to know how he came to this model? If it is because ...
0
votes
2answers
95 views

How young could the asteroid belt be?

I heard a theory (possibly from a crackpot) that there was an event in our solar system where two objects collided and created the asteroid belt, the orbits of some of the planets were altered, and ...
1
vote
1answer
150 views

How long would it take for a black hole the mass of our sun to swallow our solar system?

If a hypothetical black hole with the mass of our sun would appear in place of the sun. How long would it take before our entire solar system (everything inside our heliosphere) to be swallowed by ...
4
votes
2answers
86 views

Any studies of the detection of dark matter in or near the solar system?

Has there been any theoretical or observational study of the possibility of detecting "local dark matter", either within the solar system or near the Sun in interstellar space? If so, what methods ...
3
votes
2answers
420 views

What would happen if a Sun-like star were to consume a Jupiter-like planet?

A substantial number of discovered exoplanet systems are likely contain more than one gas giant with distances far closer to the star than in our solar system. It is known that in solar system ...
0
votes
0answers
26 views

Why aren't globular clusters disk-shaped? [duplicate]

I thought that solar systems and galaxies are disk-shaped because that is the most stable shape under gravitation. Globular clusters are very old, often times older than their host galaxies, so why ...
3
votes
4answers
215 views

Could the solar system survive in a void?

If the solar system were suddenly placed in the middle of a large void... would everything still function as normal? Would we even notice any difference here on Earth apart from the night sky? ......

1 2 3 4 5 9