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The time has come for my annual short Thanksgiving/Christmas fund drive for Behind The Black. I must do this every year in order to make sure I have earned enough money to pay my bills.

 

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As I noted in July, the support of my readers through the years has given me the freedom and ability to analyze objectively the ongoing renaissance in space, as well as the cultural changes -- for good or ill -- that are happening across America. Fourteen years ago I wrote that SLS and Orion were a bad ideas, a waste of money, would be years behind schedule, and better replaced by commercial private enterprise. Only now does it appear that Washington might finally recognize this reality.

 

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Astronomers discover Earth-sized exoplanet roasted by a Sunlike star

Using data from the TESS space telescope, astronomers have discovered an Earth-sized exoplanet in a 4.2 day orbit around a G-type star like our Sun about 70 light years away.

The tidally locked planet is very close to Earth size (it is approximately 1.1 times the diameter of our own planet) and it’s orbiting a star that’s similar to the size of our Sun (the star is about 0.91 the size and 0.99 the mass of the Sun).

The star in this system is a G-type star, the same type as our Sun. But HD 63433 d orbits much closer to its star than we do, with a minuscule 4.2 day long “year” and extremely high temperatures on its dayside.

To read the research paper, go here. At an estimated age of only 400 million years, this exoplanet and its solar system of at least two other planets is much younger than the 4.5-billion-year-old Earth. Though the press release and paper note the possibility that it is similar in many ways to Io, a volcanic planet covered with lava, we don’t know this. All we know is that it is roasted by its star by orbiting so close to it.

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

One comment

  • David Ross

    ’tis “d” because two transits were already known.

    The outer one, “c”, is a 2.67 R⊕ neptunelike… but may end up a superearth because it is losing atmosphere. No such atmospheric loss was seen in the (now-)middle planet “b”: https://iopscience.iop.org/article/10.3847/1538-3881/ac3f3b

    “d” orbits close enough I expect it to raise tides on its sun and diiie. Meanwhile it should push b to a higher orbit.

    The known orbits d:b:c are 4.2, 7.1, 20.5 days. As d augurs in, it will lock into resonances with b: first 7:4, then soon-enough Kirkwood’s 2:1. This could push d’s orbit elliptical as well.

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