Starshot: Concept and Execution

April 22, 2016

Because I get irritable when I don’t get my walking in every day, I made sure when I arrived in Palo Alto to cram as much as I could into the day before Breakthrough Discuss began. That meant heading out from the hotel just after noon and putting in about five miles. Palo Alto is […]

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The Odds on Starshot

April 13, 2016

Yesterday’s announcement of Breakthrough Starshot brought an email from exoplanet hunter Greg Laughlin (UC-Santa Cruz), whose work has been an inspiration to me since the early days of Centauri Dreams. One of Greg’s new projects, working with Anthony Aguirre (Foundational Questions Institute) and several other colleagues, is a website called Metaculus, which bills itself as […]

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Breakthrough Starshot: Mission to Alpha Centauri

April 12, 2016

Here on Centauri Dreams we often discuss interstellar flight in a long-term context. Will humans ever travel to another star? I’ve stated my view that if this happens, it will probably take several hundred years before we develop the necessary energy resources to make such a mission fit within the constraints of the world’s economy. […]

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The Snowbank Orbit, Redux

April 8, 2016

We haven’t yet found Planet Nine, but the evidence for its existence is solid enough that we can start thinking about its possibilities as a mission target. That work falls in this essay to Adam Crowl, a Centauri Dreams regular whose comments on articles here began not long after I started the site. An active […]

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John Ford Fishback and the Leonora Christine

April 1, 2016

Like the Marie Celeste, the Leonora Christine is a storied vessel, at least among science fiction readers. In his 1967 story “To Outlive Eternity,” expanded into the novel Tau Zero in 1970, Poul Anderson described the starship Leonora Christine’s stunning journey as, unable to shut down its runaway engines, it moved ever closer to the […]

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TVIW 2016: Worldship Track

March 30, 2016

Our second report from the recent Tennessee Valley Interstellar Workshop is the work of Cassidy Cobbs and Michel Lamontagne, with an emphasis on the worldship track. Cassidy has an MS from Vanderbilt, where she studied ecology and evolution. She currently works at Memorial Sloan Kettering Cancer Center, doing traditional and next-generation gene and genome sequencing. […]

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Voyager Update: Probing the Boundary

November 2, 2015

I always feel that my day starts right when a story involving the Voyagers crosses my desk. The scope, the sheer audacity of these missions in their day cheers me up, and the fact that they are still communicating with us is a continual cause for celebration. With Voyager 1 now moving beyond the heliosphere, […]

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Orbital Change at Ceres (and a Note on the Euphrosynes)

August 5, 2015

As we close in on perihelion at Comet 67P/Churyumov-Gerasimenko, the Dawn spacecraft continues its operations at Ceres. The contrast between Dawn’s arrival at Ceres in March and New Horizons’ flyby of Pluto/Charon could not have been more striking. With Dawn’s gentle ion push, we watched Ceres gradually grow in the skies ahead, and then settle […]

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Rosetta’s Comet Nears Perihelion

August 4, 2015

With the fanfare of the New Horizons flyby of Pluto/Charon, we learned that public interest in space can be robust, at least to judge from the number of people I spoke to who had never previously seemed aware of the subject. Here’s hoping that interest continues to be piqued — as it should be — […]

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Interplanetary Updates: Philae and New Horizons

June 16, 2015

Given that the Philae lander has just come to life after seven months without communicating, it’s no wonder that the mood among everyone involved with Rosetta’s mission to comet 67P/Churyumov–Gerasimenko is exuberant. On the surface of the comet, conditions have been improving for Philae since March, meaning that with higher temperatures and better illumination, it […]

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