Bedtime Astronomy

After six years of observations, the Dark Energy Survey has delivered its most precise analysis of cosmic expansion, based on hundreds of millions of galaxies.

Using weak gravitational lensing and galaxy clustering, scientists refined measurements of dark energy and confirmed much of the standard cosmological model—while revealing a persistent tension in how matter clusters across time.

These results deepen our understanding of the accelerating universe and set the stage for the next generation of cosmic observatories.

New research from Maynooth University sheds light on how supermassive black holes formed so quickly after the Big Bang. Advanced simulations show that small “light seed” black holes can grow rapidly through super-Eddington accretion in dense, gas-rich young galaxies.

This process removes the need for exotic origins and fills a key gap in our understanding of galaxy evolution, with important implications for future gravitational-wave discoveries.

The Habitable Worlds Observatory is a planned space telescope designed to identify signs of life on distant planets by capturing direct images of their surfaces and atmospheres. To succeed, scientists argue the mission requires broad spectral capabilities and high resolution to detect specific color signatures, such as the "red edge" of vegetation or the distinct hues of ancient purple bacteria. These advanced technical specifications are necessary to differentiate true biological markers from deceptive mineral mimics like iron oxide or sulfur.

By analyzing a wide range of light, the telescope could potentially uncover "green oceans" or other evidence of evolutionary stages similar to Earth's history. Ultimately, the project’s ability to find habitable worlds depends on securing the funding needed for such sensitive and precise instrumentation.

Using China’s Five-hundred-meter Aperture Spherical Telescope (FAST), astronomers have found strong evidence that some fast radio bursts originate in binary star systems. Nearly two years of observations of a repeating burst revealed extreme Faraday rotation, pointing to a nearby companion star.

The data suggest a magnetar orbiting a sun-like star whose plasma periodically distorts the radio signal. This discovery offers one of the clearest clues yet to the origin of repeating FRBs, supporting the idea that interactions in double-star systems drive these powerful cosmic flashes.

For over 20 years, SETI@home turned millions of personal computers into a global supercomputer, analyzing massive radio data in the search for extraterrestrial intelligence.

This pioneering crowdsourced project processed billions of potential signals, eventually narrowing them down to 100 top-priority targets. Today, scientists are using China's gigantic FAST telescope to re-observe these promising locations for signs of alien technology.

While no breakthrough discovery has been made yet, SETI@home revolutionized the field by setting new sensitivity benchmarks and creating powerful algorithms to separate real signals from earthly interference.

Join us as we explore how distributed computing and public participation forever changed modern astronomy!