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Readers! A November fund-raising drive!

 

It is unfortunately time for another November fund-raising campaign to support my work here at Behind the Black. I really dislike doing these, but 2025 is so far turning out to be a very poor year for donations and subscriptions, the worst since 2020. I very much need your support for this webpage to survive.

 

And I think I provide real value. Fifteen years ago I said SLS was garbage and should be cancelled. Almost a decade ago I said Orion was a lie and a bad idea. As early as 1998, long before almost anyone else, I predicted in my first book, Genesis: The Story of Apollo 8, that private enterprise and freedom would conquer the solar system, not government. Very early in the COVID panic and continuing throughout I noted that every policy put forth by the government (masks, social distancing, lockdowns, jab mandates) was wrong, misguided, and did more harm than good. In planetary science, while everyone else in the media still thinks Mars has no water, I have been reporting the real results from the orbiters now for more than five years, that Mars is in fact a planet largely covered with ice.

 

I could continue with numerous other examples. If you want to know what others will discover a decade hence, read what I write here at Behind the Black. And if you read my most recent book, Conscious Choice, you will find out what is going to happen in space in the next century.

 

 

This last claim might sound like hubris on my part, but I base it on my overall track record.

 

So please consider donating or subscribing to Behind the Black, either by giving a one-time contribution or a regular subscription. I could really use the support at this time. There are five ways of doing so:

 

1. Zelle: This is the only internet method that charges no fees. All you have to do is use the Zelle link at your internet bank and give my name and email address (zimmerman at nasw dot org). What you donate is what I get.

 

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Fifth mirror for Giant Magellan Telescope has been cast

The fifth mirror, out of seven, for Giant Magellan Telescope (GMT) has been cast by the University of Arizona mirror lab.

With its casting this weekend, the fifth GMT mirror joins three additional GMT mirrors at various stages of production in the Mirror Lab. Polishing of mirror 2’s front surface is well underway; coarse grinding will begin on the front of the third mirror shortly and mirror number 4, the central mirror, will soon be ready for coarse grinding following mirror 3. The first GMT mirror was completed several years ago and was moved to a storage location in Tucson this September, awaiting the next stage of its journey to Chile. The glass for mirror 6 has been delivered to Tucson and mirror seven’s glass is on order from the Ohara factory in Japan.

In time, the giant mirrors will be transported to GMT’s future home in the Chilean Andes at the Carnegie Institution for Science’s Las Campanas Observatory. This site is known for being one of the best astronomical sites on the planet with its clear, dark skies and stable airflow producing exceptionally sharp images. GMTO has broken ground in Chile and has developed the infrastructure on the site needed to support construction activities.

If all goes right, GMT will begin its science work using 4 mirrors in 2020, with the use of all 7 mirrors beginning in 2022. This will be several years before the larger Thirty Meter Telescope and the European Extremely Large Telescope.

Genesis cover

On Christmas Eve 1968 three Americans became the first humans to visit another world. What they did to celebrate was unexpected and profound, and will be remembered throughout all human history. Genesis: the Story of Apollo 8, Robert Zimmerman's classic history of humanity's first journey to another world, tells that story, and it is now available as both an ebook and an audiobook, both with a foreword by Valerie Anders and a new introduction by Robert Zimmerman.

 

The print edition can be purchased at Amazon or from any other book seller. If you want an autographed copy the price is $60 for the hardback and $45 for the paperback, plus $8 shipping for each. Go here for purchasing details. The ebook is available everywhere for $5.99 (before discount) at amazon, or direct from my ebook publisher, ebookit. If you buy it from ebookit you don't support the big tech companies and the author gets a bigger cut much sooner.


The audiobook is also available at all these vendors, and is also free with a 30-day trial membership to Audible.
 

"Not simply about one mission, [Genesis] is also the history of America's quest for the moon... Zimmerman has done a masterful job of tying disparate events together into a solid account of one of America's greatest human triumphs."--San Antonio Express-News

7 comments

  • wayne

    Cool development.

    Have a sampling of Sky & Telescope magazines from the mid 60’s; The University of Arizona comes up quite a bit, referencing the casting of large mirrors. (their spinning-oven apparatus, is quite impressive.)
    Back then, “Cer-vit” Brand glass from Owens Corning was the new-thing. (1967-1978)

    Am I right to assume the U of A is one of the top places for the casting of telescope mirror’s?

  • Joe

    Note to self, go to Chile to see night time sky!

  • Wayne: The UofA mirror lab is the world’s premier place for casting large telescope mirrors. In fact, no one else does it. You should read my March 2014 S&T article on GMT and the mirror lab.

  • wayne

    Cool. I will follow up. (That’s what I thought, ref U of A.)

    (again, the spinning oven, is very cool)
    UA Mirror Lab Casts Third Mirror for GMT
    2012
    https://youtu.be/uWHkoU2EqyM
    4:08

  • Dick Eagleson

    The UofA Mirror Lab is certainly impressive. But there’s a German company named – amusingly – Schott Glass that has its own proprietary near-zero-expansion glass formulation called Zerodur®. The company has been involved in several large-format astronomy projects including the European Extremely Large Telescope. I don’t know if Schott has the capability of casting monolithic mirrors of 8.4 meters diameter, but they’re definitely a player. Schott Glass seems to be pretty much the Corning of Germany.

  • wayne

    Dick–
    Great historical stuff! You encouraged me doing some mini-research.

    Never looked up “Cervit” before, but I see it’s related to Zerodur and a Russian brand, Sitall.

    I see that Otto Schott developed Borosilicate glass, (‘Duran’ brand) in 1893, 22 years before Corning developed Pyrex brand. And if Wikipedia is to be believed, “Pyrex made its public debut in 1915 during World War I, positioned as an American-produced alternative to Duran.”)

    Back to the GMT–made from “E6 glass” from the Ohara Corporation of Japan.
    http://www.oharacorp.com/group.html

  • Dick Eagleson

    So Pyrex was the “Victory Cabbage” (sauerkraut) of glassmaking, eh? Interesting to know.

    I seem to remember reading that UofA uses a type of borosilicate glass to make its mirrors. Maybe “E6” falls into that category.

    And who knew the Irish were so big in Japan? :-)

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