Jupiter at its brightest

Today is going to be the brightest Jupiter will be in the sky for several years. It had its nearest approach last night 3:10AM EST (08:10 UTC) at a distance of 393.36 million miles or 4.232 AU. This is the closest Jupiter will be to the earth until 2033. However, it was about 26 million miles closer in 2022.

Tonight at 3:31AM EST (08:33 UTC) it will be in opposition where it is 180º away from the Sun.

These next few days will be great opportunities to see the planet. With binoculars, you should be able to see the Galilean moons of Jupiter as well.

Information about the relative motion of the different planets is linked at http://sesquibits.com/mars/index.html which is a page titled “Graphing Planetary Motion.” The formulas used by the website come from Planetary theories in rectangular and spherical variables-VSOP 87 solutions

The website graphs the distance, relative speed, and acceleration between any pair of the 8 planets. The site allows you to scan for maximal and minimal events in the distance, speed, acceleration as well as conjunctions, quadrature and opposition. It also can display the time of perihelion and aphelion for each planet. It presents information from the year 300 to 3500. The “capture graph” button creates a link that will regenerate the current display.

One of the most interesting graphs is the relative acceleration between Earth and Mars. It shows dramatically the effect of the moon on the orbit of the Earth.

Review: Ad Astra (2019)

A Rocketship
Ad Astra, (To the Stars), is a space epic that often features Brad Pitt’s face. Unfortunately, he isn’t asked to smile much.

Two ongoing motifs are remarks about the exceptionally low heart rate of Pitt’s character and agency-required monologue psychological evaluations. Roy McBride’s remarks are used as a cue to the audience into his mental state. After all, there is little dialog to allow his character to be built up more naturally. No other character is important enough for that.

Central to the story is a classified “Lima” project. Despite the secrecy surrounding it, many people that McBride meets have more information for him. The project was led by Roy McBride’s missing father, the hero H. Clifford McBride, played by Tommy Lee Jones. This connection provides an evolving emotional impetus for the story.

Ad Astra has a dystopian projection of how terrestrial nations deal with the resources of space. On the moon, each nation has staked out a claim that leaves a dangerous no-mans-land between their territories. Space travel has become a commercial venture, but SpaceCom seems to consider it secondary to their secret intrigues.

Since it’s a Hollywood movie, I didn’t expect the science to be very hard or precise, so I was willing to suspend disbelief for a lot. Yet, one horribly weak plot point struck me. Landing on the near side of the moon and driving to a base on the far side is hard to defend. However, the situation gave some action to a story that is heavy on cerebral pursuits. (See the psychological evaluations.)

The story is straightforward to describe. It’s hard to say much about the story without dropping spoilers. With a few nodes of action with slower stretches between them, the story would need expansion to make a novel.

I’m glad I saw the film on IMAX so that I could feast my eyes on the beautiful set development. I really appreciated the sonic environment that the movie possesses as well.

Weekend

Three colored hexagonsThis was a pleasant weekend. I got a bunch of things done and felt pretty comfortable.

I worked on some Perl scripts that allow data entry and calculations with my budget information. I could have done it with an Excel spreadsheet, but developing code was more enticing.

I also have been upgrading my laptop. I installed Windows 10 on it. The system is unacceptably sluggish but I can’t justify upgrading to a new laptop. Right now it is synchronizing my 200k+ files in dropbox. That is taking a long time. I’ll have to see how the laptop behaves once dropbox is settled.

I installed Scrivener, Cygwin and ActiveState Perl. Also Office 365 and I built the 4.07.0 OCaml system. The laptop I’m keeping slightly more “stock” by not installing utilities like Avast and possibly also not other browsers like Chrome and Firefox.

I’ve built a couple websites recently. One, http://alphaomegaonline.org has morphing colors. It’s not interactive although clicking flips between different algorithms for the color transformations. I’m designing an update that reacts to mouse clicks by “fracturing” the screen into sub-screens that morph independently.

The other site http://sesquibits.com/planets.html calculates and displays a running summary of the distance between the planets. It also shows relative velocities and acceleration. You can pick any planet as the center point. A future goal for the site is to present interactive graphs of the planetary distances.

Other pleasant escapades in the weekend were visiting friends, going to the Y and reading a couple of books. I ate way too much pizza.