| How a Cray-1 Supercomputer Compares to a Raspberry Pi Dec 31st 2023, 15:34, by EditorDavid Roy Longbottom worked for the U.K. covernment's Central Computer Agency from 1960 to 1993, and "from 1972 to 2022 I produced and ran computer benchmarking and stress testing programs..." Known as the official design authority for the Whetstone benchmark), Longbottom writes that "In 2019 (aged 84), I was recruited as a voluntary member of Raspberry Pi pre-release Alpha testing team." And this week — now at age 87 — Longbottom has created a web page titled "Cray 1 supercomputer performance comparisons with home computers, phones and tablets." And one statistic really captures the impact of our decades of technological progress. "In 1978, the Cray 1 supercomputer cost $7 Million, weighed 10,500 pounds and had a 115 kilowatt power supply. It was, by far, the fastest computer in the world. The Raspberry Pi costs around $70 (CPU board, case, power supply, SD card), weighs a few ounces, uses a 5 watt power supply and is more than 4.5 times faster than the Cray 1." Thanks to long-time Slashdot reader bobdevine for sharing the link.   Read more of this story at Slashdot. | | Could We Build a Concert Venue in Space? Dec 31st 2023, 12:34, by EditorDavid What would happen if we built a concert venue in near-Earth orbit? A science policy journalist explores the question in the Washington Post: Forget U2 in the Las Vegas Sphere. Take me to a real concert in the round, where I can float 360 degrees around the stage, watching a guitarist shred from the perspective of a fly and inventing dance moves that Earth's gravity would forbid. Before you dismiss this as a hallucination, consider that we're on the cusp of a new era of space travel. Engineer and space architect Ariel Ekblaw, founder of MIT's Space Exploration Initiative, says that within a decade, a trip off the planet could become as accessible as a first-class airline ticket — and that, in 15 or 20 years, we can expect space hotels in near-Earth orbit. She's betting on it, having founded a nonprofit to design spherical, modular habitats that can assemble themselves in space so as to be lightweight and compact at launch, much like the James Webb Space Telescope that NASA vaulted into deep space two years ago. "The first era of space travel was about survival," she told me as I recently toured her lab. "We're transitioning now to build spaces that are friendlier and more welcoming so that people can thrive in space as opposed to just survive." There's no reason, Ekblaw said, that a concert hall can't be one of those structures. The article ultimately calls this "an impulse for space travel I can get behind: curiosity about who we are and what more we can create when we reach beyond Earth. This is the realm of not just scientists and engineers but of all kinds of dreamers. It's a rendition of space exploration that can engage anyone to imagine what's possible." Read more of this story at Slashdot. | | 'Behold - the Best Space Images of 2023' Dec 31st 2023, 08:34, by EditorDavid As the year comes to a close, "one constant, reliable source of awe and beauty is the sky over our head..." writes astronomer Phil Plait in Scientific America "And every year we see new things, or old things in new ways, and I've been set the wonderful task of selecting my favorites and relaying them and their import to you." End-of-year lists, especially those displaying astronomical imagery, tend to be splashy and colorful. That's understandable, but what they sometimes miss are the more subtle photographs, those that hide momentous discoveries in minor visual details or offer fresh perspectives on familiar objects. They may not leap off the page, but they still have an impact. That's what I've kept in mind while sorting through this year's celestial treasure trove. This gallery is by no means complete, but it shows what I think are some of the most interesting astronomical portraits to have emerged in 2023. No gallery such as this would be complete without something from the James Webb Space Telescope (JWST), our newest infrared eye on the sky. This monster observatory has already brought so many small revolutions to astronomy that picking one from the past year is no small task. Should it be a baby star throwing an immense tantrum or a massive old star shedding material at colossal rates before it inevitably explodes as a supernova? Or should it be a map of a mind-stomping 100,000 galaxies? Well, how about something very, very different — such as the skeletal structure of a nearby galaxy's intricate web of dust [also displayed at the top of Scientiic American's article]...? [I]t has a beautiful spiral structure and shows the effects of a smaller galaxy colliding with it. In the phenomenally sharp and decidedly eerie false-color view from JWST's Mid-Infrared Instrument, we see countless clouds of cosmic dust in a skeletonlike pattern. Each of these clouds is made up of small grains of rocky and sooty carbon-based molecules expelled by dying stars... Astronomers captured this image to better understand how stars are born in stellar nurseries and how they evolve over time. Read more of this story at Slashdot. | | 20% of America's Plants and Animals are At Risk of Extinction Dec 31st 2023, 05:35, by EditorDavid It was a half a century ago that America passed legislation to protect vanishing species and their habitats — and since then, more than five dozen species have recovered. Just one example: In 1963 only 417 nesting pairs of bald eagles were found in the lower 48 states. But today there's more than 300,000 bald eagles, writes USA Today. "[T]hough its future remains uncertain, many experts say it remains one of the nation's crowning achievements." But 1,252 species are still listed as endangered in the U.S. — 486 animals, and 766 plants — with 417 more species categorized as "threatened." The perils of the changing climate add urgency to calls for increased funding and more protection. In North Carolina, for example, the rising sea steadily creeps over a refuge that's home to the sole remaining wild red wolf population. Off New England, warming waters forced changes in the foraging habits of the endangered North Atlantic right whale, putting the massive marine mammals in harm's way more often... One in 5 plant and animal species in the nation remain at risk of extinction, says Susan Holmes, executive director of the Endangered Species Coalition. "Loss of habitat and climate change are absolutely some of the most important threats that we have." "We are at what I would say is a pivotal moment with the threats of climate change," she said. "We have to act faster than ever in order to ensure that these species are going to thrive." Read more of this story at Slashdot. | |
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