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A Brief-ish History of SETI. Part VI: The Great Silence and the Great Filter

In the closing decades of the 20th century, several proposed explanations were put forward for why humanity has not yet found evidence of extraterrestrial intelligence in the cosmos. from Universe Today https://ift.tt/OQStrBZ via IFTTT
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TESS Data Reveals 27 New Planet Candidates in Binary Systems

You’re doing some late afternoon work on the habitat as part of humanity’s first exoplanet settlement, but the sun is going down so you’re trying to speed things up. Just as the light dims, everything suddenly starts getting brighter. You look up and see the sun starting to rise again, except it’s your second sun. You kick yourself for not checking the daily sunrise and sunset logs, but you’re happy you get to put in a bit more work before you eat dinner. from Universe Today https://ift.tt/h3VIswp via IFTTT

Astronomers Find New Circumbinary "Tatooine-like" Planet Candidates

There's a distinct category of exoworlds out there that orbit two stars. They're called "circumbinary" planets and up until recently, astronomers had only found about 18 of them among the 6000+ other known exoplanets and candidates. Now, a team at the University of New South Wales (UNSW) in Sydney, Australia, have found 27 more potential circumbinary worlds. They credit a new method, called apsidal precession, for their finding. from Universe Today https://ift.tt/CMQocJU via IFTTT

A Brief-ish History of SETI. Part V: The First Interstellar Messengers

During the 1970s, the first interstellar probes were launched, carrying messages specifically designed to be intelligible to extraterrestrial species. The messages were essentially a "message in a bottle" intended for an advanced civilization, should they find the probes someday. from Universe Today https://ift.tt/fODmRzC via IFTTT

Iron and Ice: Earth's Passage Through the Interstellar Cloud

Our Solar System is currently passing through the Local Interstellar Cloud, a region of highly diluted gas and dust between the stars. On its path, Earth continuously accumulates iron-60, a rare radioactive isotope of iron produced in stellar explosions. This has now been confirmed by an international research team led by the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) through the analysis of Antarctic ice tens of thousands of years old. From the steady but time-varying influx, the researchers conclude that the radioactive isotope has been stored within the cloud since a long-past stellar explosion. from Universe Today https://ift.tt/TeGsU3J via IFTTT

Gazing Into the Past With TIME

How can astronomers observe ancient galaxies when they're so challenging to resolve? By looking at a whole bunch of them at once in a single spectral line and seeing how it changes over time. That's what a new instrument called the Tomographic Ionized-carbon Mapping Experiment (TIME) does. from Universe Today https://ift.tt/qHsQJ57 via IFTTT

The Milky Way's Turbulence Distorts Light from Distant Quasars

We may be getting better images of the Milky Way's supermassive black hole in the future. Astronomers used 10 years of observations of a distant blazar to detect turbulence in the Milky Way's interstellar medium. This turbulence makes images of Sagittarius A-star blurry. from Universe Today https://ift.tt/4Bye3od via IFTTT