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Astronomers have long thought it takes millions of years for the seeds of stars like the Sun to come together. Clouds of mostly hydrogen gas coalesce under gravity into prestellar cores dense enough to collapse and spark nuclear fusion, while magnetic forces hold matter in place and slow down the process. But observations using the … Read more
General relativity is physicist Albert Einstein‘s understanding of how gravity affects the fabric of space-time. The theory, which Einstein published in 1915, expanded the theory of special relativity that he had published 10 years earlier. Special relativity argued that space and time are inextricably connected, but that theory didn’t acknowledge the existence of gravity. Einstein … Read more
The flight, dubbed “Inspiration4,” was a privately chartered spaceflight by Billionaire Jared Isaacman, which launched on Sept. 15, 2021. It becoming the first crewed orbital mission with no professional astronauts on board. named to commemorate the four-person crew and their associated “pillars” of support for St. Jude Children’s Research Hospital in Memphis, Tennessee: leadership, hope, … Read more
The James Webb Space Telescope has successfully deployed all five layers of its tennis-court-sized sunshield, a prerequisite for the telescope’s science operations and the most nerve-wracking part of its risky deployment. The challenging procedure, which required careful tensioning of each of the five hair-thin layers of the elaborate sunshield structure was a seamless success today (Jan. 4). … Read more
Amazon’s Alexa has a new feature: it can fly you to the moon. The virtual assistant, which is more commonly used (on Earth) to control devices around your home, is set to launch on a journey around the moon aboard NASA’s Artemis 1 mission later this year. Together with Cisco’s Webex video conferencing platform, Alexa … Read more
An illustration of a hovering-rover concept. (Image credit: MIT) Air is invisible but mighty: birds harness it to fly, planes on Earth and distant machines like NASA’s Ingenuity helicopter on Mars work with it to soar above the surface. Now, researchers are working on a new craft that could lift off the ground with no … Read more
So there you are, about to leap into a black hole. What could possibly await should — against all odds — you somehow survive? Where would you end up and what tantalizing tales would you be able to regale if you managed to clamber your way back? The simple answer to all of these questions … Read more
The Perseid meteor shower (also known as The Perseids) is perhaps the most popular meteor shower of the year, visible between July and August. With clear skies, you could see what some consider the most spectacular cosmic light show. American spectators can expect to see the greatest number of meteors during the shower’s peak between … Read more
The latest version of Samsung’s Eco Remote gets energy from both spare Wi-Fi signals and solar power Technology 5 January 2022 By Matthew Sparkes Samsung’s Jong-Hee Han announced the new remote at the CES trade show in Las Vegas Samsung Samsung has created a television remote control that doesn’t require batteries, as it draws power … Read more
The following essay is reprinted with permission from The Conversation, an online publication covering the latest research. At the end of 2020, it seemed hard to imagine a worse year for misinformation on social media, given the intensity of the presidential election and the trauma of the COVID-19 pandemic. But 2021 proved up to the … Read more