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Posts: 10
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An Oddity in the Small Magellanic Cloud
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Published: December 20, 2024 18:23
Let’s make a quick return to the Magellanics after our recent look at WOH G64, a dying star imaged in the Large Magellanic Cloud (see Close-up of an Extragalactic Star). These satellite galaxies of the Milky Way have long proven useful in helping…
Charting the Diaspora: Human Migration Outward
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Published: December 18, 2024 16:13
It’s not often that I highlight the work of anthropologists on Centauri Dreams. But it’s telling that the need to do that is increasing as we continue to populate the Solar System with human artifacts, which are after all the province of this discipline.…
Redefining the Galactic Habitable Zone
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Published: December 11, 2024 15:56
To understand the Solar System’s past and to tighten our parameters for SETI searches, we need to consider habitability not only as a planetary and stellar phenomenon but a galactic one as well. The Milky Way is a highly differentiated place, its core…
Can Life Emerge around a White Dwarf?
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Published: December 6, 2024 20:03
My curiosity about white dwarfs continues to be piqued by the occasional journal article, like a recent study from Caldon Whyte and colleagues reviewing the possibilities for living worlds around such stars. Aimed at Astrophysical Journal Letters, the…
Autumn Among the Galaxy Clusters
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Published: December 4, 2024 10:13
The idea of moving stars as a way of concentrating mass for use by an advanced civilization – the topic of recent posts here – forces the question of whether such an effort wouldn’t be observable even by our far less advanced astronomy. In his paper on…
A Look at Dark Energy & Long-Term Survival
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Published: November 27, 2024 12:42
If life can organize into sentient beings around stars other than our own, there are few assumptions we can make about the civilizations that would emerge. We’ve long ago given up on the idea that such creatures would look like us, just as we abandoned the…
Close-up of an Extragalactic Star
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Published: November 21, 2024 20:00
While working on a piece about interstellar migration as a response to the accelerating expansion of the universe for next week, I want to pause a moment on a just announced observation. I’ve always had a fascination with the Magellanics, those satellite…
Star Harvest: Civilizations in Search of Energy
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Published: November 19, 2024 13:23
Living a long time forces decisions that could otherwise be ignored. This is true of individuals as well as societies, but let’s think in terms of the individual human being. Getting older creates survival scenarios as simple as ensuring safety and…
Clearing the Air
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Published: November 18, 2024 14:28
I’ve played around a bit with Bluesky in the past, but have now decided it’s time to make a move. Those of you who have been following the site on X will want to know about the change, as posted in my first new Bluesky ‘skeet’ in some time. The change in…
A Millisecond Pulsar Engine for Interstellar Travel
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Published: November 14, 2024 10:27
Suppose you want to migrate to another star, taking your entire civilization with you. Not an easy task given our technology today, but let’s remember that in the 13 billion year-plus history of the Milky Way, countless stars and their planets have emerged…