우주 과학

Satellites Powered by Water? The Revolutionary Propellant Changing Spaceflight
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물로 움직이는 위성? 우주비행을 혁신하는 획기적 추진제

위성의 물 추진은 증기 추진(레지스토젯), 연소를 위한 수소와 산소로의 전기분해, 또는 고 ISP 추진을 위한 물-플라즈마/이온 스러스터를 사용할 수 있습니다. Momentus Space의 Vigoride는 마이크로파 전기열 스러스터(MET)를 사용하여 태양광으로 물을 마이크로파로 가열해 플라즈마로 끓인 뒤, 이를 고에너지 제트로 분사합니다. 2023년 1월, Momentus의 Vigoride-5는
9월 7, 2025

Technology News

  • 50 Years of GOES-1: How the First Geostationary Weather Satellite Transformed Forecasting
    October 25, 2025, 9:22 PM EDT. Fifty years ago, on Oct. 24, 1975, GOES-1 launched the era of geostationary weather satellites, enabling real-time views of developing storms. Preceding GOES-1 were polar-orbiting TIROS-1 satellites that could only image a location twice daily. By staying fixed about 22,300 miles above the equator, GOES-1 delivered continuous data and the first weather-imaging feed from space, reshaping forecasting. From its grainy black-and-white footage to today's GOES-R series, geopositioned satellites have become essential tools in meteorology. As AI is integrated into forecasting in 2025, the field remembers the NASA/NOAA engineers who laid the foundation five decades ago.
  • Tech Jam in Vermont Explores AI's Future, Ethics, and Society
    October 25, 2025, 9:06 PM EDT. At Vermont's Tech Jam, industry leaders and students gathered to debate how AI will shape society. More than 1,000 attendees heard about the technology's pivot point and the need for ethical AI, with speakers like Will Jefferies urging careful consideration of risks and benefits. Loc Nguyen compared AI to driving a car - powerful but requiring responsibility. Students like Katie Irwin raised concerns about environmental impact, misinformation, and reliance on AI in learning, even as Irwin uses it to help code robots. Others, including Erik Iverson, praised time savings but emphasized keeping humans in the loop to ensure technology enhances rather than replaces human work.
  • SpaceX Falcon 9 Hits Triple-Digit Launch Years as Starship Looms
    October 25, 2025, 8:18 PM EDT. SpaceX's Falcon 9 has been the company's workhorse since 2010, delivering cargo, building Starlink, and driving down launch costs. The rocket achieved its first triple-digit launch year in 2024, with 2025 already pushing toward a second, and 2026 expected to produce a third. The surge is fueled largely by Starlink constellation, which accounts for roughly three-quarters of 2025 launches. As Starship advances toward operational status, SpaceX plans to sunset Falcon 9 and shift more launches to Starship, especially for Starlink once orbital missions begin. Gwynne Shotwell has signaled that this year and next year I anticipate will be the highest Falcon launch rates that we will see, foreshadowing a gradual transition as Starship matures.
  • I Tried OpenAI's Atlas Browser to Rival Google - Here's What I Found
    October 25, 2025, 7:46 PM EDT. OpenAI's new Atlas browser aims to reinvent web browsing with a ChatGPT-driven sidebar. In tests, it resembled Chrome/Safari but with a chatting companion and built-in deal highlighting and price comparisons. Early roadblocks included messages limit reached, no available models support the tools in use, and a free plan limit for GPT-5. OpenAI touts Atlas as a step toward a true super-assistant and a potential revenue stream, likely through subscriptions rather than ads. The tool could feed on vast user data to improve navigation and recommendations, raising questions about privacy and data use. For now, Atlas appears to be a premium product that may only deliver full capabilities to paying users, signaling big changes if the experiment scales.
  • Elon Musk Says AI Could Be Good for Humans-But He Still Wants to See It Play Out
    October 25, 2025, 7:30 PM EDT. Elon Musk discussed xAI's Grok 4 during a livestream, arguing that AI will likely be good for humanity even as he jokes he'd like to be alive to see if it goes bad. He called Grok 4 the smartest AI in the world, saying it's 'smarter than almost all graduate students' across disciplines, and warned that superintelligent systems could be unsettling. Musk frames breakthroughs as no longer theoretical and even muses that the human economy may feel quaint in retrospect as civilization progresses. The mix of optimism and unease highlights his belief that watching AI advance from the front row will be a defining spectacle, regardless of whether outcomes are fully favorable.