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The World at Night

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A Video You Must See (Click on Link Below)

One of my favorite websites is NASA’s Astronomy Picture of the Day Archive. Rarely do I dip into it without coming up with a gem. In this particular case, we follow the rotation of the earth at night. Highlighted are the bright lights of urban concentrations and the strobes of widespread lightning strikes.

The overall effect is of watching a planet that is alive. And that’s just night: Imagine if we could also see the swirling winds, the tides, and storms at sea.

Don’t click on the image above: It’s just there as an illustration. To watch the video, click here.

It’s my belated Christmas gift to all of you, wherever you may be.

North (and Central) American Nebula

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Looks Like the Map of North America from Yucatán to Panama

Every once in a while, I check out NASA’s Astronomy Picture of the Day which frequently has images which make me think. The above picture is technically called the Cygnus Wall of Star Formation. According to the website:

The North America nebula on the sky can do what the North America continent on Earth cannot — form stars. Specifically, in analogy to the Earth-confined continent, the bright part that appears as Central America and Mexico is actually a hot bed of gas, dust, and newly formed stars known as the Cygnus Wall. The featured image shows the star forming wall lit and eroded by bright young stars, and partly hidden by the dark dust they have created. The part of the North America nebula (NGC 7000) shown spans about 15 light years and lies about 1,500 light years away toward the constellation of the Swan (Cygnus).

Makes me yearn to visit Yucatán—yet again.

Terminator Moon

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NASA Picture of Terminator Moon

What exactly is a terminator moon. According to the Astronomy Picture of the Day for February 15, 2022, here is the explanation from NASA:

What’s different about this Moon? It’s the terminators. In the featured image, you can’t directly see any terminator — the line that divides the light of day from the dark of night. That’s because the image is a digital composite of 29 near-terminator lunar strips. Terminator regions show the longest and most prominent shadows — shadows which, by their contrast and length, allow a flat photograph to appear three-dimensional. The original images and data were taken near the Moon by NASA’s Lunar Reconnaissance Orbiter. Many of the Moon’s craters stand out because of the shadows they all cast to the right. The image shows in graphic detail that the darker regions known as maria are not just darker than the rest of the Moon — they are flatter.

Mars Beneath the Surface

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Doesn’t Look Like Much, Does It?

When I was attending my mindful meditation session on November 15, the cute young woman who acted as liaison with the L.A. Central Library handed me a flier that promised an interesting experience:

Live, from another world! Watch the live stream of NASA’s InSight mission when it lands on Mars. InSight is a robotic lander designed to study the interior of the Red Planet. The mission is scheduled to land on the surface of mars at Elysium Planitia, where it will deploy a seismometer and burrow a heat probe. This will be the first mission dedicated to studying the deep interior of the planet.

As the event was scheduled for today at 11 am, I took the Metro to the Central Library and attended the event. For all the years that I have lived in Southern California, I have never interested myself in the space program—except for my visit to the retired space shuttle Endeavour at the California Science Center. This was to be the first Mars landing in six years, and it was the first that was planned and executed all within the State of California. It was put together by the Jet Propulsion Laboratory (JPL) in Pasadena, staffed largely by graduates of Cal Tech, and launched early in May from Vandenberg Air Force Base near Lompoc.

Although technically, the live-streaming was a bit of a dud, with the image going into long buffering pauses in between live action snippets. At one point, I asked if they were running Windows 3.1, which was the version I used in the late 1980s. When I found that they were using Apple’s Safari browser, I noted yet another black mark laid to Apple’s account (though it probably wasn’t Apple’s fault).

Mockup of the Mars InSight Lander

Fortunately, there were a number of JPL employees present who were able to bridge all the lacunae and present a coherent picture of the mission from the point of view of the techies who were most involved. Fortunately, it was a splendid success, with the first picture coming in within minutes of the landing. It doesn’t look like much: It’s merely an image of the surface on which the lander was situated. You can see mostly a lot of dust (this is because there is a protective transparent lens cap covering the photo lens) and a rock in the lower left foreground. At the lower right, you see one of the legs of the lander.

This mission is not meant to move around the surface of the planet: It is, rather, to use a seismograph (that’s the object above that looks like an upside-down colander) to determine whether the Red Planet has a molten core, or whether it’s as dead as our moon. There is also a probe drilled 15 feet into the surface of the planet to measure micro-variations in heat.

I understand that JPL has an open house in the spring that I am interested in attending.