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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. from any other book seller, or direct from my ebook publisher, ebookit. 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


Hubble spots long term seasonal changes on Uranus

Uranus as seen by Hubble in 2014 and 2022
Click for original image.

Using images of Uranus taken eight years apart by the Hubble Space Telescope, astronomers have detected significant seasonal changes in the atmosphere of the gas giant, caused by its unusual sideways rotation.

The two pictures to the left, realigned and reduced to post here, show the changes. If you look closely you can see the planet’s ring system and its shift to almost face on at present.

[top] — This is a Hubble view of Uranus taken in 2014, seven years after northern spring equinox when the Sun was shining directly over the planet’s equator, and shows one of the first images from the OPAL program. Multiple storms with methane ice-crystal clouds appear at mid-northern latitudes above the planet’s cyan-tinted lower atmosphere. Hubble photographed the ring system edge-on in 2007, but the rings are seen starting to open up seven years later in this view. At this time, the planet had multiple small storms and even some faint cloud bands.

[bottom] — As seen in 2022, Uranus’ north pole shows a thickened photochemical haze that looks similar to the smog over cities. Several little storms can be seen near the edge of the polar haze boundary. Hubble has been tracking the size and brightness of the north polar cap and it continues to get brighter year after year. Astronomers are disentangling multiple effects – from atmospheric circulation, particle properties, and chemical processes – that control how the atmospheric polar cap changes with the seasons. At the Uranian equinox in 2007, neither pole was particularly bright.

To really understand the long term climate of Uranus will likely take centuries, since its year lasts 84 Earth years. Since the beginning of space exploration, we have only had now about forty years of good imagery of the planet, and even that has been sporadic and very incomplete.

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8 comments

  • Gary H

    Your report needs to be fact checked. There are no humans on Uranus, so how can there be climate change?

  • Jhon B

    We are going to send Greta up there to get those people on the right track and stop that fuel bruning.

  • Robert Pratt

    Yes, “everyone” knows that planetary climates are static except when un-natural humans engage in commerce and life improvement.

  • David

    Gary H, Jhon B, and Robert Pratt:

    Thanks for the illuminating viewpoints. Profound!

  • Milt

    Hummmm. Given what is happening in its polar region, Uranus’ albedo ought to be increasing, but I have heard no reports of the planet’s brightness increasing as observed by astronomers. Ordinarily hovering on the edge of naked eye visibility at magnitude 5.6, I am wondering if it has become just a bit easier to see. Is anyone aware of such reports?

    PS — Yes, we should all chip in and help send Greta there to warn the Uranians of their impending doom.

  • Michael Puckett

    Well, it is the only planet we know of with an east and a west pole.

  • Star Bird

    Just how deep is the Snow on Uranus?

  • Max

    Ha! Snow…
    Uranus is the coldest of the four gas giants… Near 10,000°F under its atmosphere. About the same temperature as the photosphere (surface) of the sun. (it must be all that methane)

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