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Questions tagged [astronomy]

Questions on the astronomical applications of Mathematica.

7
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1answer
110 views

StarData: proper motion of a star in HelioCoordinates

I am not an astronomer, but am trying to calculate the trajectory of an interstellar space probe, for example to Proxima Centauri. The HelioCoordinates seem appropriate, as typically used within the ...
0
votes
2answers
94 views

Plotting a parametric solution from NDSolve

Im trying to animate multiple points around multiple parametric plots which depicts orbital motion of body around a planet. Initial conditons are; ...
0
votes
1answer
122 views

Plotting elliptical orbits using Verlet method

I'm looking to solve a 2 body system consisting of the Earth and a body of mass in orbit. I'm using the Verlet method to numerically integrate Newton's equation of motion in order to plot an ...
5
votes
1answer
56 views

Select Specific StarData

The help menu for StarData has many examples such as StarData[EntityClass[ "Star", {EntityProperty["Star", "DistanceFromEarth"] -> TakeSmallest[10]}]] ...
-1
votes
2answers
40 views

a ListAnimate problem

Thanks to @AlexTrounev, I learned how to use ListAnimate, but I still get stuck using it. Before ListAnimate everything is correct. I just cannot successfully use ListAnimate to make the plot. I have ...
0
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1answer
55 views
0
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1answer
100 views

Animate particle's trajectory

Does anyone know how to animate the trajectory of a particle, but make sure before the particle reaching a certain spot, there's nothing. I mean I want to make an animation that look like https://en....
3
votes
1answer
273 views

Interpreting Mathematica code on black holes

I am trying to understand the code written down on page 7 of this document (code is in Mathematica) I understand pretty much all of the code on the previous page needed to setup the page 7 code (...
1
vote
0answers
75 views

Solving the values of Christoffel symbols from a given metric tensor

Is there any easy mathematica package by which I can solve the Christoffel symbols from a given metric tensor?
3
votes
1answer
87 views

Creating the celestial sphere for astronomical demonstrations

Quick question: has anybody produced (and/or willing to produce and share) a nice celestial sphere with some stars and/or constellations? I am traveling , so I cannot do it myself right now, but I ...
1
vote
0answers
50 views

Calculating Christoffel Symbols [duplicate]

I am totally new in the astrophysics field and I need to calculate Christoffel symbols for a model. The line element for the FLRW metric and the geodesic equation is given below: ...
0
votes
2answers
95 views

Using WhenEvent to calculate the period of an orbit

I'm having trouble trying to have Mathematica tell me when the period of the orbit of my system is. Namely, I'm trying to use Mathematica to find the orbital period of the Earth around the Sun. Here's ...
0
votes
1answer
80 views

Plotting the orbit of the Earth around the Sun. Error: step size is effectively zero; singularity or stiff system suspected

I've been asked to plot the orbit of the Earth around the sun over a period of three years. I've copied my exact code below. When I try to run it I get a series of errors, the first being: NDSolve:...
13
votes
1answer
549 views

Speed up NDSolve compared to Python (calls to LSODA)

I migrated a numerical model code from Python to Mathematica and am surprised how much faster the Python version runs. Profiling of the Python version tells me that it is about 100 times faster (120 ...
6
votes
1answer
131 views

Does SolarEclipse only cover a limited date range?

If I use the example from the documentation for SolarEclipse and simply replace the years there with older ones, say from around Shakespeare's time, ...
13
votes
2answers
512 views

Processing images from NASA's Juno Jupiter Orbiter

Question Can you help me improve what I’ve done to create an enhanced-color picture from an image provided by NASA’s JunoCam? [My work is shown in the penultimate image of Jupiter in this post.] I’...
2
votes
1answer
76 views

InverseFunction's domain is not the range of the function that was inverted

I wrote a function to calculate how long of a period has past when a planet traverses an angle theta from perihelion in an orbit of a given eccentricity. ...
1
vote
2answers
75 views

How do I pull a multiple pieces of data from a while loop and put into a table

I am wanting to pull multiple pieces of data from a while loop and put it in a list. The example I have added below is a table with inputted data that I found. Im pretty sure the syntax is unrelated ...
1
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0answers
73 views

SatelliteData for a hypothetical satellite

SatelliteData appears to have some sort of orbit propagator behind it. It works for existing satellites, but is there any way to use it to predict the orbit of a ...
3
votes
1answer
102 views

Typeset the standard “Moon” symbol

As it says on the tin, I want a way to typeset the astronomical symbol for the moon, which is a crescent. I also want this in such a way that I could integrate it into a button as a label, like the ...
1
vote
1answer
106 views

list of dates for vernal equinox

I'm trying to get a list of dates and times of the vernal equinox for the last 30 years (or some other time interval). I'm flailing about and really have gotten nowhere. When I've tried typing ...
1
vote
1answer
78 views

TrueAnomaly of planet orbit as a function?

It is possible to obtain the true anomaly of a planet this way: ...
1
vote
1answer
899 views

How to convert astronomical RA and Dec from sexagesimal to degree?

Astronomers use right ascension (RA) and declination (Dec) to refer to the sky coordinates of celestial objects. RA and Dec can take be represented degrees or in sexagesimal (base 60). How can I ...
2
votes
1answer
203 views

Calculating with scientific notation

I want to calculate the gravitational force between the Earth and its Moon using Newton's gravitational formula: (G M1 M2)/d^2 and its appropriate physical units. I'd include the code I wrote for ...
4
votes
1answer
308 views

Lagrangian form of Earth-Sun Kepler blows up NDSolve?

I've looked at this 1-D SE question. That question seems to have difficulties around diverging potential functions, and I don't have that. I've looked at this 2-D 3-body demonstration, but that starts ...
2
votes
0answers
241 views

Plotting orbits of trajectories of bodies sharing the earth's orbit in coordinates centered at the barycenter of the solar system [closed]

I am attempting to try and plot the trajectories of a trio of satellites that are orbiting with the earth-moon system around the solar system's barycenter. Originally, I had the satellites in orbit ...
4
votes
1answer
400 views

Orbit followed by a particle around Schwarzschild Black Hole

The following is a equation which describes various possible orbits of a particle around the Schwarzschild black hole spacetime in general relativity. I want to solve it from ...
6
votes
1answer
145 views

TimeZone Anomaly

I ran into the following situation when I was trying to determine the time of sunrise (using the built-in Sunrise function) for a variable location on a variable ...
11
votes
1answer
381 views

Calculate moonrise

Mathematica has Sunrise[], but no Moonrise[]. But it has MoonPosition[], so I thought it ...
11
votes
3answers
461 views

How to speed up plotting with PlotPoints?

I'm plotting an ellipse 1/(1 - e Cos[x]) with e=0.9 using PolarPlot. Taking $x\in[0,2\pi)$, ...
10
votes
1answer
319 views

Plotting how sunrise times change over the year

I created a somewhat lengthy Python code to show how the time of sunrise varies over a year, resulting in the following figure (daylight savings were disregarded): The dataset can be found here. The ...
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0answers
199 views
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0answers
59 views

Is MoonPosition working as expected?

I have noticed some surprising behavior when executing the MoonPosition function. When I provide a range of dates, I get a TemporalData answer: ...
7
votes
1answer
184 views

Mass distribution in NDSolve

I'm trying to model the solar system with NDSolve, basically a numerical n-body solution. I model the initial positions of bodies from a data set thusly: ...
4
votes
0answers
179 views

Predicting Manhattanhenge

At the time of writing, Manhattanhenge is tonight in New York City (ref 1), "an event during which the setting sun is aligned with the east–west streets of the main street grid of Manhattan, New York ...
4
votes
1answer
113 views

How To Improve Mathematica StarData Performance When Compared To AstronomicalData

My tests of using AstronomicalData versus StarData show that StarData requests are 15 times ...
2
votes
1answer
88 views

How To Replace xAxis and yAxis Number Values With An Associated Name

This application works great. The thing is, the associations: {{xAxis, 6}, {4, 5, 6, 7, 8}}, {{yAxis, 7}, {5, 6, 7, 8}}, while functional, are not very intuitive. How can I replace xAxis and yAxis ...
8
votes
0answers
84 views

Extracting, Formatting, and Exporting Mathematica AstronomicalData - Is There an Easier Way?

If any of you have tried to use Mathematica AstronomicalData and its newest replacements like StarData, you may already be familiar with the large data issues, and the almost impossible download times....
1
vote
2answers
93 views

How to Refresh ChartLabels when Manipulate BarChart Take Data Positions Change

See attached sample code at the bottom of this post. Under Manipulate, as I step through BarChart data using Take with different start/end positions, the chart of the data is refreshed, but the ...
0
votes
2answers
158 views

How to Replace Plot Slot Numbers With Variable Names

The format of my data looks like: ...
3
votes
1answer
155 views

Working with StarData Versus AstronomicalData

Using AstronomicalData I could easily do something like: ...
13
votes
5answers
4k views

Beautiful dance of the Earth and Venus around the sun

I have seen very nice dynamic graphics created by users of Ma. I would like to get help whether the following graphics can be created using Ma. I was not able to create the dynamic picture here. ...
6
votes
1answer
387 views

GeoGraphics - mapping the Moon

The link here shows a nice way to depict the map of the Moon in Mathematica. But, is there a way to center the Mollweide projection onto the far side of the Moon?
1
vote
1answer
766 views

How to add moon to orbit Earth that Orbit Sun

I want to add moon(Blue) that orbiting earth(Red). while Earth is orbiting Sun. this is my code so far that consist of earth, sun and moon. how to write a code so that Moon is orbiting earth instead ...
26
votes
1answer
890 views

Interstellar Image Effects

I'd like to know how to create this type of gravitational lensing effect in an image (here are some star fields from the hubble) "I wrote down the equations and I tested them in Mathematica by ...
4
votes
1answer
182 views

Plotting the Equation of Time: SiderealTime and SunPosition

The equation of time describes the discrepancy between two kinds of solar time. The word equation is used in the medieval sense of reconcile a difference. The two times that differ are the apparent ...
17
votes
2answers
5k views

What is the closest star to Earth other than the sun?

How to find the Sun's nearest neighbor star using Mathematica? I tried but it didn't work
5
votes
2answers
300 views

How to find the Andromeda Galaxy

I would like to find the Andromeda Galaxy ($M31$) with the unaided eye. One way is to use the following image and graphic but I can’t find it just by looking in a dark sky. It is hard to detect ...
12
votes
1answer
680 views

Can I create a radar chart of sunrise/sunset times for a year

Can I create a radar chart (or just a simple curve) of sunrise/sunset times, for a given location thougout a year? It would be something like this, but with a smooth curve: (source: hassanhameed.com)...