Three decades of space telescope observations converge on a precise value for the Hubble constant

This collection of 36 images from NASA’s Hubble Space Telescope features galaxies that are all hosts to both Cepheid variables and supernovae. These two celestial phenomena are both crucial tools used by astronomers to determine astronomical distance, and have been used to refine our measurement of the Hubble constant, the expansion rate of the universe. … Read more

‘Ghost’ fossils reveal tiny organisms that survived ancient ocean warming events

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. CNN – The unexpected discovery of “ghost” fossils belonging to tiny, ancient organisms could provide insights about how life reacts to climate change in Earth’s oceans. Looking through a powerful microscope, researchers were stunned to … Read more

Boeing successfully launches Starliner spacecraft to orbit in do-over test flight

Nearly two and a half years after its first launch didn’t go to plan, Boeing’s new passenger spacecraft, the CST-100 Starliner, successfully launched to space this afternoon, reaching the right orbit it needed to achieve to rendezvous with the International Space Station tomorrow evening. The successful launch marks the beginning of a crucial test flight … Read more

Researchers use the galaxy as a ‘cosmic telescope’ to study the heart of the young universe

An artist’s rendering shows how a cluster of galaxies (lensing cluster) acts as a gravitational lens that magnifies and extends the light from a background galaxy. This results in a projected image (marked in the rectangle panel) that is brighter and easier to detect with a telescope. This allowed astronomers to use Keck Observatory’s KCWI … Read more

Starliner astronauts eager to see results from crew capsule test flight – Spaceflight Now

NASA astronaut Butch Wilmore speaks with reporters Wednesday at the Kennedy Space Center. Credit: NASA / Joel Kowsky The NASA astronauts training for the first crew missions on Boeing’s Starliner spacecraft will be closely watching each step of the capsule’s unpiloted test flight to the International Space Station, set for blastoff Thursday from Cape Canaveral … Read more

Enzyme breaks down PET plastic in record time

Dr Christian Sonnendecker and his team discovered an enzyme that breaks down PET plastic at record speed. Credit: Leipzig University / Swen Reichhold Plastic bottles, punnets, wrap — lightweight packaging made of PET plastic becomes a problem if it is not recycled. Scientists at Leipzig University have now discovered a highly efficient enzyme that degrades … Read more

Bizarre Self-Mutilation in Mothers Linked to Cholesterol

Like many octopuses, the California two-spot octopus (Octopus bimaculoides) declines and dies shortly after breeding. Credit: Tom Kleindinst, Marine Biological Laboratory Changes in cholesterol production lead to a tragic octopus death spiral. New research finds remarkable parallels in steroid hormone biology across cephalopods, mice, and humans that can have dire consequences when disrupted. Despite their … Read more