Category Archives: Space

The problems with ensuring humanity’s survival with space colonies

Stephen Hawking, as he has done before, expresses a common sentiment, that we need to colonize space in order to survive. Humans should go and live in space within the next 1,000 years, or it will die out, Stephen Hawking … Continue reading

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Reaching the stars will require serious out-of-the-box thinking

Sten Odenwald, an astronomer with the National Institute of Aerospace, has an article up at HuffPost that many will find disheartening: The Dismal Future of Interstellar Travel | Dr. Sten Odenwald. I have been an avid science fiction reader all my life, but as … Continue reading

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The real goal and challenge of establishing off-world colonies

David Warmflash (a very cool name) has a post up at Discovery looking at the issues with establishing off world colonies: Forget Mars. Here’s Where We Should Build Our First Off-World Colonies. The collective space vision of all the world’s countries … Continue reading

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The size of the observable universe is complicated.

The radius of the observable universe is often stated to be 46 billion light years.  From a certain point of view, this is true, but I think it’s a bit of a misleading statement.  Occasionally you also see people say that … Continue reading

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Tegmark’s Mathematical Universe Hypothesis

I recently read Max Tegmark’s latest book, ‘Our Mathematical Universe‘, about his views on multiverses and the ultimate nature of reality.  This is the fourth and final post in a series on the concepts and views he covers in the book. The … Continue reading

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Tegmark’s Level II Multiverse: bubble universes

I recently finished reading Max Tegmark’s latest book, ‘Our Mathematical Universe‘, about his views on multiverses and the ultimate nature of reality.  This is the second in a series of posts on the concepts and views he covers in the book.  Tegmark postulates four levels … Continue reading

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Tegmark’s Level I Multiverse: infinite space

I’ve just finished reading Max Tegmark’s latest book, ‘Our Mathematical Universe‘, about his views on multiverses and the ultimate nature of reality.  This is the first in a series of posts that I plan to do on it.  Tegmark postulates four … Continue reading

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Minimum crew size for an interstellar generation ship

John Hawks takes a look at a fascinating article in Popular Mechanics that looks at what the minimum crew size would need to be for an interstellar generation ship, and relates it to what is known about genetics in anthropology. … Continue reading

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You say multiverse, I say galaxies

Corey Powell has an interesting post up on what he calls the Four Great Eras of Exploration.  The first era was Galileo’s discovery of the vastness of the universe, the second that stars were composed of chemical elements, and the … Continue reading

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The hard working but unloved multi-stage rocket

If you’ve ever read about rocket technology, particularly the issues involved in how much fuel is needed to get somewhere, you quickly run into a stark reality.  The payload, the part of the rocket that you want to get somewhere, … Continue reading

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