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| [![enter image description here][1]][2] **Full gallery:** https://www.flickr.com/photos/jeff-m-bryant/albums/72157686287351384 ---------- Here are [**some pictures**][3] of the aurora borealis I took last night from southwest Champaign... |
| ![enter image description here][1] While investigating the TRAPPIST-1 exoplanet system in WL, I found this very cool looking mandala pattern that arises by connecting lines between the 7 planets in the system, and iterating time in discrete steps.... |
| BTW, I should add that this meteor shower typically produces about 100 meteors per hour: In[5]:= Entity["MeteorShower", "Perseids"]["PeakZHR"] Out[5]= Quantity[1.0*10^2, 1/("Hours")] Although some predictions are claiming that... |
| The source doesn't specify a range of dates for which the results are valid, at least not in an obvious way. Often, additional references are given for some of the sub-computations. Its possible that if you do enough source spelunking, you might find... |
| Very nice! One minor improvement would be to use the following LightSource so that the Sun doesn't look like its being illuminated off to one side. Instead of "Natural", use: Lighting -> {{"Directional", White, ImageScaled[{0, 0, 1}]}} ... |
| I edited the code a bit to change the original Thickness directives with AbsoluteThickness which behaves better when large numbers of digits are involved. |
| Essentially, your premise is true for an object at infinity. The Sun is far enough away that this approximation nearly fits, but the Moon is close enough that there is a measureable parallax effect. Using simple trigonometry using the polar diameter... |
| For clarification, this visualization is for illustrative purposes, as mentioned in the first sentence. The function being plotted is not derived from any general relativity equations. Its a very similar surface to the one used on the Wikipedia page... |
| I'm a big fan of the book, "[The Martian][1]" and am very much looking forward to the movie, due in theaters on Oct. 2nd. I focused my pent-up excitement into exploring aspects of the story via the [Wolfram Language][2]. Using [Mathematica 10.2][3],... |
| Your comments are not entirely clear. The issue with supporting dates is a known recent problem dealing with how dates are exposed via EntityValue (used by StarData and PlanetaryMoonData under-the-hood). Its more general and doesn't affect the Alpha... |