Recent content by Janus

As I might not have time tomorrow, this is for those who do celebrate it.

This made me think of I-94, the freeway that crosses North Dakota. It runs pretty much straight East-West. I been on it a good number to times, both as a passenger, and driver. ND is, for the most part. pretty flat, so you'll get long stretches of straight road, and then, for no apparent...

Let's take the effect of gravity in consideration for a moment. Yes, gravity will cause a red-shift, but this requires moving from a lower gravitational potential to a higher one, such as climbing out of a gravity well. However, falling into a gravity well has the opposite effect, a blue-shift...

Prior to then I made a few trips to Canada ( from the US) with nothing more than a driver's license. (and the the 70's even without that. We were on a family trip from the Pacific Northwest to Upper Midwest to visit relatives. My Dad decided to drive back through Canada on the way home. Since...

After playing around a bit with making star maps, I found another video which introduced me to another trick that can be done using geometry nodes. This one involves fluids. For background, Blender has a fluid physics simulator, which, as the name suggests simulates the behavior of fluids. What...

After a bit of experimentation, I was able to make of full animation in the stereoscopic format. The 3D effect in this is more pronounced, as I figured out how to properly position the projection frame. It turns out that the scale of my model was larger than the limits allowed for the stereo...

A new twist made possible by these maps being made as a 3d-model. Blender also has the ability to produce stereoscopic images in a number of different formats Red/cyan, side by side, etc. So for instance this is a side by side stereoscopic image from one frame of a video. You can view the...

I have done that, Since the Vizier site does allow you us that as a constraint. I had to create separate CSV files for each class, and then do a separate geo-node for each. I used the blackbody temperature colors for the stars. The color difference is subtle. While this looked nice with still...

As per your request: Getting the text to look proper for the second part took some finagling. The first part was pretty straight- forward. Basically it meant making an individual CSV file which only had a single row of information which related to the star I was labeling. Then using that...

Since moving just a few light years would not make much of a difference, I decided to make this animation. It starts from 5 ly out and then recedes. I chose Ursa Major as the background constellation again, as it is one of the most recognizable. Since the original data didn't include the Sun...

That would be a bit beyond this particular application's ability. First off, you'd need accurate values for all the orbital elements of its trajectory through the Solar system. The resulting accuracy of this trajectory would depend on how accurate our values for those elements are. To track...

A couple more examples. The first incorporates proper motion data to show how Ursa Major would change over time. I included other visible stars and their proper motions as well. The second touches on the change of view due to position and shows how the constellation would change as the viewing...

Technically I could be done, though some adjustments would likely be needed to be made. For Alpha C, you should just be able to move the camera to its position and point it at our Sun in the model. For stars significantly further, it would take some additional work. Let's put it this way: Our...

Blender just recently dropped a new version, 4.5(with 5.0 on the horizon), and within it was a new feature for which I immediately thought of a use for. The new feature was a .csv importer for Geometry nodes. Geometry nodes are a method of modelling that uses a node tree to create 3D models...

So basically, you are using "I'm cold, put on a coat." reasoning.