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Welcome back to our series on interstellar travel! In our first installment, we examined attempts to realize nuclear propulsion and how the technology could be used to reach the nearest star. In our second, we examined how fusion power has also been considered a means of propelling spacecraft to relativistic speeds (a fraction of the […] A new study from Monash University has delivered the most complete and accurate digital map of Earth’s windblown sand dunes to date. The research, published in Nature Communications, answers long-standing questions about why dunes form where they do, unlocking key insights into climate conditions on Earth and other planets. Go to Source […] Astronomers have discovered a chemically rich collection of sulfur-bearing molecules surrounding the rare massive star HD 87643. The observations include the first detection of sulfur monoxide and sulfur dioxide around a B[e] supergiant. The paper was published in The Astrophysical Journal Letters on July 1. Go to Source A Cessna 150 collided with a Pennsylvania State Police Bell 407 near a Carlisle airport runway, killing the plane’s pilot and trapping two troopers in the helicopter Go to Source For close to a century, physicists have pursued a way to unite gravity with quantum mechanics. Known as quantum gravity, this goal has remained frustratingly out of reach so far. Similarly elusive is the force of dark energy, which is believed to be driving the universe’s accelerating expansion. Go to Source Eclipses may be wondrous, but nothing beats seeing the northern and southern lights from space. Go to Source The mission to save NASA’s sinking Swift Observatory was called off Wednesday, dooming the telescope to a fiery reentry later this year. Go to Source Remember the “Wow!” signal? That high-energy radio signature occurred in 1977, when Earth was much “quieter” in the radio band. If it happened today, it probably wouldn’t even move the needle on the background noise of human radio chatter. Signals from satellites, radar and other human technology have crowded out extraterrestrial radio signals, limiting our […] At the bottom of the ocean, optical fibers transmit telecommunications and internet data around the world. Waveguides make that feat possible by channeling and amplifying the light—and therefore the data within—over enormous distances. Go to Source A mysterious background of extremely low-frequency gravitational waves detected by networks of pulsars may carry information about events that began more than 13 billion years ago—including the formation of some of the first supermassive black holes in the universe. Go to Source Some of Earth’s microbes likely to hitch a ride to space with human explorers could survive in the shaded nooks and crannies of the moon’s South Pole region, NASA scientists say. Go to Source When different materials transition from one phase to another, such as water coming to a boil or a magnet losing its ability to attract metals, something remarkable can happen: They begin to behave identically, following the same mathematical rules. “Physicists call this trait universality—the messy, microscopic details wash out and only a few essential features […] Before people can mine resources on the moon, asteroids or Mars, they need to answer a few key questions: What is there? How much is there? And where can it be found? A team led by SETI Institute research scientist Pablo Sobron is looking into a new way to answer these questions without having to […] Quantum computers hold great promise for applications from drug discovery to cybersecurity. Yet figuring out what would give quantum computers their edge over everyday “classical” computers is a subtle problem. A new theoretical study led by researchers at the Cavendish Laboratory shows that quantum computers are harder to make powerful than previously assumed while offering […] |
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