Science fiction revisited: Ramjet propulsion

In science fiction stories about contact with extraterrestrial civilisations, there is a problem: What kind of propulsion system could make it possible to bridge the enormous distances between the stars? It cannot be done ...

Looking for lurkers —a new way to do SETI

The most recently discovered group of rocky bodies nearby Earth are termed co-orbital objects. These may have been an attractive location for extraterrestrial intelligence (ETI) to locate a probe to observe Earth throughout ...

Climate change may prevent contact with alien civilisations

Enrico Fermi, when asked about intelligent life on other planets, famously replied, "Where are they?" Any civilisation advanced enough to undertake interstellar travel would, he argued, in a brief period of cosmic time, populate ...

Sailing Among the Stars

(PhysOrg.com) -- NASA launch will evaluate how a nanosatellite spacecraft and its payload performs.

Languages will change significantly on interstellar flights

It's a captivating idea: build an interstellar ark, fill it with people, flora, and fauna of every kind, and set your course for a distant star. The concept is not only science fiction gold, it's been the subject of many ...

Riding the wave of a supernova to go interstellar

When it comes to the challenges posed by interstellar travel, there are no easy answers. The distances are immense, the amount of energy needed to make the journey is tremendous, and the time scales involved are (no pun!) ...

Why sailing to the stars has suddenly become a realistic goal

It takes a bold person to declare that interstellar travel is now within our grasp. Physicist Stephen Hawking has shown that he is just that, taking part in the Breakthrough Starshot initiative. The project has announced ...

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