Winter Solstice

Winter solstice occurs today at 18:48HST. Today the Sun will occupy the most southerly position in the sky of the year. The term solstice comes from the Latin terms Sol (the Sun) and sistere (to stand still). On this day the Sun seems to stand still as it stops moving southwards each day and begins move to the north. This is the first day of winter as marked by many cultures in the northern hemisphere. Alternately, this is the first day of summer for those folks in the southern hemisphere.

2015 Solstices and Equinoxes
  UT HST
Perihelion Jan 4 08:59UT Jan 3 22:59HST
Vernal Equinox Mar 20 22:45UT Mar 20 12:45HST
Summer Solstice Jun 21 16:38UT Jun 21 06:38HST
Apehelion Jul 6 12:59UT Jul 6 02:59HST
Autumnal Equinox Sep 23 08:20UT Sep 22 22:20HST
Winter Solstice Dec 22 04:48UT Dec 21 18:48HST
 
Source: NASA Sky Calendar

 

Replacing the Celestron NextStar GPS Battery

When your Celestron GPS telescope will not get GPS fix for a long time, or the GPS will not work at all, it is time to replace the battery on the GPS receiver board. Another symtom is when the telescope may get a fix, but it is incorrect, the time or location no where close.

Celestron Telescope GPS Module
The Celestron GPS telescope GPS module with the original battery
Instructions for replacing the battery are posted elsewhere about the web. There are excellent instructions for battery replacement on the NexStar Resource Site. It was those instructions I was following when I was recently replacing the battery in our ‘scope.

The GPS board is found in the main section on the oldest telescopes, but located in the arm in later ‘scopes. Our is located in the arm, a small circuit card just under the inside plastic panel connected to an antenna by a cable. Simply remove the four screws holding the plastic panel and you have access. The antenna cable can be disconnected with some gentle tugging, two screws for the board, one more connector and the board comes out. The battery is found hidden on the underside of the PCB.

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Questioning the Dogma

There is a pretty good article published on the Civil Beat website earlier this week. In it author Peter Apo questions many of the basic claims made by those protesting the construction of the Thirty Meter Telescope. The identity of the author is of particular relevance as Mr. Apo is Hawaiian and has served the state and community in various offices. He is currently a trustee for the Office of Hawaiian Affairs, very much at the center of the controversy. I highly suggest reading the article.

Ahu
An ancient ahu (shrine) atop Mauna Kea with Mauna Loa in the background
The article hit home for me as I too have been confused about some of the claims I have heard. They just do not coincide with other information on the history of the mountain that I have studied over the years I have lived here. Since the controversy started I have been reading many of the old records, from the Kumulipo to the laws of the Hawaiian Kingdom. Yet I have many questions when modern claims seem to conflict with the records. Mr. Apo has obviously had the same questions, but is in a much better position to look hard at some of them and provide some evaluation.

It is in the comment section that the true divide in the community becomes apparent. What is disturbing to see are the truly nasty accusations flung at Mr. Apo in the comments. For questioning some of the anti-TMT movement’s basic claims, for asking valid questions, the abuse he receives is unrelenting.

Peter Apo is a sell out! How dare he question the “Traditions” of his own Kupuna? – Herbert Faima

Fuckin fake Hawaiian! – Ricky Keona Kauanui

Peter Apo the quintessential sellout and all around parasite. – Kama Ki

Fortunately there are as many positive comments, thanking Mr. Apo for publishing the article. Many of those commenting clearly understand that it took a good deal of courage to write the article, undoubtedly knowing what would occur. Seen in these comments is the split revealed in polling data, that even among the Hawaiian community opposition for the telescope is not a complete majority.

Good article, arigato Peter. We, the silent majority, decided to keep quiet as the protesters were getting violent and out of hand. Threats were made to individuals, families and businesses. Many business owners kept quiet so that no one would get hurt. – Russell Arikawa

I have to hand it to you, you’ve got the nads to speak what you feel is the truth. For that, you are to be commended. We should never be afraid of a discussion. I see that this discussion is quite healthy. Mahalo for helping light the fire of dialogue. – Tim Orden

I agree with the necessity to question dogma. In a controversy like this the facts become somewhat malleable. Often exaggeration or complete misinformation slips into the conversation, to be repeated so often that it becomes truth to those inclined to believe. In this I too must congratulate Mr. Apo in looking back to the old records to see what may have been added to the conversation, to get a little closer to the truth.

A Winter Star Party

In Arizona, during the heat of summer we would head for the mountains. We knew dozens of fire roads and meadows where a telescope could be set up under the stars among the cool forest pines. When the weather chilled, we headed to the low desert, our favorite site was Sentinel, Arizona. A desolate volcanic field just off Interstate 8 between Gila Bend and Yuma. It was still cool at night, a beautiful place to enjoy the desert skies…

Deep Violet at Sentinel
Deep Violet at Sentinel, Arizona for the 2015 Pierre Schwarr Star Gaze

How far for a good photo?

How far do you need to go for a good photo? My trips to Central America or Alaska have resulted in a catalog of great images. On the other side, so many of my good photos can be found close to home, the geckos in my garden or the shoe rack a few feet from the desk where I process my photos…

Shoe Rack
Shoe rack at the front door in the afternoon light.

The Most Reviled of Scientific Instruments

Scientific instruments have a habit of presenting us with uncomfortable truths. Galileo’s telescopes showed that our solar system did not conform to the prevailing teachings of the day. The great particle accelerators show a complexity underlying reality that defies a simple explanation of the universe. Likewise an almost forgotten instrument sitting atop a volcano has shown that humans have altered our world in very damaging ways.

NOAA Mauna Loa Climate Observatory
The NOAA Mauna Loa Climate Lab in the light of dawn
I had driven to the top of Mauna Loa for a session of Geminid meteor watching and photography, joining Steve, a local photographer and friend for a cold, beautiful morning atop the mountain. As we were about to leave another friend drove past. Ben used to work with me at Keck and now tends the solar observatory adjacent to the NOAA climate laboratory. Looking at the sky and the drizzling fog that had rolled in with the dawn he noted that it would be a while before he could open the telescope. Instead he offered us a tour.

It was in the main building that we stopped to look at a little instrument parked rather oddly in the hall. Not much, a simple box with a few aluminum tubes and a bit of circuitry and wiring. It took me a moment to realize I was looking at a piece of scientific history. Here was the Scripps Carbon Dioxide Analyzer that has provided the data that has changed our relationship with our planet.

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