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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Mauna Kea Observatories Put New Spin on Galaxy Formation

W. M. Keck Observatory press release

A team of Australian researchers used two Maunakea-based observatories – Gemini North and W. M. Keck Observatory – to discover why some galaxies are clumpy rather than spiral in shape and it appears that low spin is to blame. The finding challenges an earlier theory that high levels of gas cause clumpy galaxies, and sheds light on the conditions that brought about the birth of most of the stars in the Universe. The finding was published today in The Astrophysical Journal.

Galaxy Velocity
The massively star-forming galaxies analyzed in this study have clumpy, turbulent gas shown here in false colors. Credit: W. M. Keck Observatory/Gemini Observatory/Hubble
“This result was obtained by a unique and unusual combination of TWO large telescopes,”said Swinburne University astronomer Professor Karl Glazebrook, co-author and leader of the survey team “We used Keck adaptive optics to probe the fine details of galaxy rotation and Gemini to look at the large scale distribution. This made possible a result that was not before known about the spin of early primitive galaxies. It is one of the most exciting results of my career.”

A combination of integral field spectroscopy data from Keck Observatory and Gemini Observatory was the key to obtaining measurements for a galaxy’s spin. Keck Observatory’s OSIRIS instrument collected data high spatial resolution in the galaxy centers, and the Gemini Multi-Object Spectrograph (GMOS) collected data for high surface brightness sensitivity out to large radii.

Lead author Dr. Danail Obreschkow, from The University of Western Australia (UWA) node of the International Centre for Radio Astronomy Research (ICRAR), said that ten billion years ago the Universe was full of clumpy galaxies, but these developed into more regular objects as they evolved; the majority of stars in the sky today, including our five billion-year-old Sun, were probably born inside these clumpy galaxies.

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New Clues to Ceres’ Bright Spots and Origins

NASA/JPL press release

Ceres reveals some of its well-kept secrets in two new studies in the journal Nature, thanks to data from NASA’s Dawn spacecraft. They include highly anticipated insights about mysterious bright features found all over the dwarf planet’s surface.

Ceres Spots
This false color image from NASA’s Dawn spacecraft of Ceres’ Occator Crater shows differences in surface composition.
Credit: NASA/JPL
In one study, scientists identify this bright material as a kind of salt. The second study suggests the detection of ammonia-rich clays, raising questions about how Ceres formed.

About the Bright Spots

Ceres has more than 130 bright areas, and most of them are associated with impact craters. Study authors, led by Andreas Nathues at Max Planck Institute for Solar System Research, Göttingen, Germany, write that the bright material is consistent with a type of magnesium sulfate called hexahydrite. A different type of magnesium sulfate is familiar on Earth as Epsom salt.

Nathues and colleagues, using images from Dawn’s framing camera, suggest that these salt-rich areas were left behind when water-ice sublimated in the past. Impacts from asteroids would have unearthed the mixture of ice and salt, they say.

“The global nature of Ceres’ bright spots suggests that this world has a subsurface layer that contains briny water-ice,” Nathues said.

A New Look at Occator

The surface of Ceres, whose average diameter is 584 miles (940 kilometers), is generally dark — similar in brightness to fresh asphalt — study authors wrote. The bright patches that pepper the surface represent a large range of brightness, with the brightest areas reflecting about 50 percent of sunlight shining on the area. But there has not been unambiguous detection of water ice on Ceres; higher-resolution data are needed to settle this question.

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