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Using alpine as an IMAP client for G-suite at UC Berkeley.
Mon 2021-10-11 10:41  

It's been 8+ years since my last post on how to keep ancient mail readers working with the most popular corporate email provider. The instructions there about encrypting your pine password file still work. But Google's "app passwords" can't be used any more at Berkeley, so here is the current method.

You need to have Alpine v2.22 or above. To trigger authentication with the currently-supported OAUTH2 method, use settings as shown above. I got this from the relevant page in Eduardo Chappa's Alpine project. You also have to go to console.developers.google.com and follow these helpful instructions from UMBC, which are far more complicated than the old procedure of creating an app password. There are also instructions for this part at the Alpine project, but the UMBC instructions are slightly easier to follow (and I found them first).

Now sometimes when you open Alpine, it will show a screen with an ugly Google link. Copy/paste that to a browser where you are logged in to your G-suite account, copy the key that the link provides, come back to Alpine, and enter that key after pressing "C" for "enter Code."


Python in a TI graphing calculator.
Fri 2021-07-30 11:36  

I just saw an article/ad for a Texas Instruments TI-84 that has Python. This is so exciting and cool. This is what I want for Christmas, even though I'm pretty sure I would not actually use it. I made a whole pros/cons list to understand how completely irrational my attraction to this device is:

Pros Cons
  • Cool
  • Has Python
  • Very nice color blue and green keys
  • TI calculators are well made and virtually last forever
  • I already have a calculator
  • I already have Pythons
  • Easier to type/view code on a computer
  • Cannot use when wearing contacts (keys/screen too small)
  • Does not have as many dedicated functions as my TI-30XA (DEG->RAD, DMS->DD, etc.)
  • Will Python last forever?


Interactive Jupiter images at NOIRLab.
Tue 2021-05-11 16:47  

NOIRLab put together a really cool interactive experience that lets you compare simultaneous Jupiter images at multiple wavelengths. The data were obtained at Hubble and Gemini North observatories.

CREDITS: I'm grateful to NOIRLab staff for producing the release, with special appreciation to Vanessa Thomas for patiently meticulous writing, Lars Christensen for the idea of doing an image comparison, and Mahdi Zamani for giving the Jupiter data his special touch of vitality and glamour. The Gemini data are from program GN-2016B-FT-18 (PI Wong) and the Hubble data are from program GO-14839 (PI de Pater). Observations and processing were described in Wong et al. (2020) and de Pater et al. (2019). This work was enabled by the location of the Gemini North telescope within the Maunakea Science Reserve, adjacent to the summit of Maunakea. I am grateful for the privilege of observing Ka'āwela (Jupiter) from a place that is unique in both its astronomical quality and its cultural significance.


Great conjuction 2020.
Sun 2020-12-06 19:45  

I'm fascinated with the 2020 Great Conjunction, because (1) there is an entire word ("great conjunction") specifically reserved for when Jupiter and Saturn are in the same place in the sky, and (2) Hubble would be able to capture images of both of them in a single pointing. But this is just a dream, because the relative positions of the Earth, Jupiter, and Saturn means that the grand giants appear too close to the Sun for Hubble to target. Otherwise, a parallel exposure using HST's ACS and WFC3 cameras could have imaged both planets at the same time!

Friends have been asking me about this event, so here is some more info:

  • When will it happen? The planets will be closest to each other in the sky on December 21 at 18:21 UTC (09:21 PST, thank you timeanddate.com), although this could vary by a few minutes depending on your location on the Earth. It will be daytime for half of us (including those in California), but that's OK. Jupiter and Saturn will be astoundingly close together for a few days before and after 21 December too. The best time to view them is just after sunset. They will be following the Sun down.
  • But someone said it was at 13:30 UTC. The conjunction is indeed closer to 13:30 UTC (04:30 PST), but conjunction specifically means the planets are at the same east-west coordinate (right ascension) in the sky. Because their paths are at different angles, the closest approach (called the "appulse") will be a few hours later at 18:21 UTC, when Jupiter has passed slightly to the east of Saturn.
  • Do I need a telescope? The great conjunction can be enjoyed without a telescope, especially if you get in the habit of taking a peek at the planets every few days leading up to it. A nice diagram here shows how Jupiter and Saturn approach over time. At conjunction, they will be closer together than any of the bright stars in the Pleiades. So depending on your eyesight, you may still be able to tell that they are two separate points of light. With binoculars, you'll be able to see Saturn's unique shape (the rings), and possibly some of the major satellites. With a telescope, you can see details on the disk of Jupiter, and the gap between Saturn and its rings... perhaps in a single frame! I am very excited to see what spectacular images the amateur astronomers manage to produce.

CREDITS: Timing and distance information comes from JPL Horizons, where geocentric observer position was selected. The simulated sky image was generated by the JPL Solar System Simulator, and the instrument footprints themselves were taken from the WFC3 Instrument Handbook. Gordy Bjoraker generated the solar system perspective view using the open-source Cosmographia visualization tool.