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šŸ¦œ Centauri Dreams ā€” Imagining and Planning Interstellar Exploration

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Site URL: follow.it/centauri-dreams-imagining-and-planning-interstellar-exploration

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Posts: 10

Followers: 1

HD 219134: Fine-Tuning Stellar Music

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Published: May 13, 2025 14:19

HD 219134, an orange K-class star in Cassiopeia, is relatively close to the Sun (21 light years) and already known to have at least five planets, two of them being rocky super-Earths that can be tracked transiting their host. We know how significant theā€¦

Writing a Social Insect Civilization

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Published: May 9, 2025 17:04

Communicating with extraterrestrials isnā€™t going to be easy, as weā€™ve learned in science fiction, all the way from John Campbellā€™s Who Goes There? To Ted Chiangā€™s Story of Your Life (and the movie Arrival). Indeed, just imagining the kinds of civilizationsā€¦

Is Planet Nine Alone in the Outer System?

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Published: May 6, 2025 15:08

It was Robert Browning who said ā€œAh, but a manā€™s reach should exceed his grasp, or whatā€™s a heaven for?ā€ A rousing thought, but we donā€™t always know where we should reach. In terms of space exploration, a distant but feasible target is the solarā€¦

New Horizons: Still More from Systemā€™s Edge

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Published: May 2, 2025 13:34

Even as Iā€™ve been writing about the need to map out regions just outside the Solar System, Iā€™ve learned of a new study that finds (admittedly scant) evidence for a Planet 9 candidate. I wonā€™t get into that one today but save it for the next post, as weā€¦

Charting the Interstellar Medium

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Published: April 29, 2025 13:43

We donā€™t talk about the interstellar medium as much as we ought to. After all, if a central goal of our spacefaring is to probe ever further into the cosmos, weā€™re going to need to understand a lot more about what weā€™re flying through. The heliosphere isā€¦

Magnetic Collapse: A Spur to Evolution?

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Published: April 25, 2025 12:57

The sublime, almost fearful nature of deep time sometimes awes me even more than the kind of distances we routinely discuss in these pages. Yes, the prospect of a 13.8 billion year old cosmos strung with stars and galaxies astonishes. But so too do theā€¦

TOI-270 d: The Clearest Look Yet at a Sub-Neptune Atmosphere

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Published: April 22, 2025 15:42

Sub-Neptune planets are going to be occupying scientists for a long time. Theyā€™re the most common type of planet yet discovered, and they have no counterpart in our own Solar System. The media buzz about K2-18b that we looked at last time focused solely onā€¦

A Possible Biosignature at K2-18b?

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Published: April 18, 2025 13:50

As teams of researchers begin to detect molecules that could indicate the presence of life in the atmospheres of exoplanets, controversies will emerge. In the early stages, the method will be transmission spectroscopy, in which light from the star passesā€¦

New Explanations for the Enigmatic Wow! Signal

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Published: April 15, 2025 10:13

The Wow! signal, a one-off detection at the Ohio State ā€˜Big Earā€™ observatory in 1977, continues to perplex those scientists who refuse to stop investigating it. If the signal were terrestrial in origin, we have to explain how it appeared at 1.42 GHz, whileā€¦