The first 4G network on the moon could pave the way for future lunar colonies and Mars missions.
Category: space – Page 11
An asteroid that could level a city now has a 3.1-percent chance of striking Earth in 2032, according to NASA data released Tuesday—making it the most threatening space rock ever recorded by modern forecasting.
Despite the rising odds, experts say there is no need for alarm. The global astronomical community is closely monitoring the situation and the James Webb Space Telescope is set to fix its gaze on the object, known as 2024 YR4, next month.
“I’m not panicking,” Bruce Betts, chief scientist for the nonprofit Planetary Society told AFP.
In a study published in Optics Express, a research group led by Prof. Fu Yuxi from Xi’an Institute of Optics and Precision Mechanics (XIOPM) of the Chinese Academy of Sciences has developed the first room temperature holmium-doped yttrium lithium fluoride (Ho: YLF) composite thin disk laser, which can achieve high efficiency and quality continuous-wave laser output.
Lasers operating in the 2 µm spectral range are highly valued for their eye safety, high water absorption, and low atmospheric attenuation.
Conventional 2 µm lasers typically require cryogenic cooling to control thermal effects, which increases system complexity and cost, and restricts their use in compact, space-constrained, and mobile platforms. Therefore, developing high-power, room-temperature 2 µm lasers has become a vital research direction.
A neutrino of record-breaking energy — 220 PeV — has been detected by the underwater KM3NeT telescope, marking a pivotal moment in astrophysics.
This tiny but powerful particle, born from the universe’s most extreme events, provides fresh clues about cosmic accelerators. While its exact origin remains unknown, scientists believe it could be the first detected cosmogenic neutrino. The discovery fuels new momentum for multi-messenger astronomy, with future observations expected to shed light on the deepest mysteries of the cosmos.
More pocked with craters than any other object in our solar system, Jupiter’s outermost and second-biggest Galilean moon, Callisto, appears geologically unremarkable. In the 1990s, however, NASA’s Galileo spacecraft captured magnetic measurements near Callisto that suggested that its ice shell surface—much like that of Europa, another moon of Jupiter—may encase a salty, liquid water ocean.
But evidence for Callisto’s subsurface ocean has remained inconclusive, as the moon has an intense ionosphere. Scientists thought this electrically conductive upper part of the moon’s atmosphere might imitate the magnetic fingerprint of a salty, conductive ocean.
Now, researchers have revisited the Galileo data in more detail. Unlike in prior studies, this team incorporated all available magnetic measurements from Galileo’s eight close flybys of Callisto. Their expanded analysis much more strongly suggests that Callisto hosts a subsurface ocean.
Ugly.
Job losses are always terrible. This will be a dark and painful day at a space agency that brings so much light and joy to the world. Many of the probationary employees are just starting out their careers and were likely thrilled to land a job at NASA to explore the universe. And then all of that youthful energy and hope was extinguished this week.
It’s possible to view these losses through a couple of lenses.
Yes, NASA is clearly losing some capability with these latest cuts. Many of these hires were likely being counted on to bring new energy into the space agency and become its future discoverers and leaders. And their jobs are being sacrificed for no clear purpose. Is it to increase funding for the military? Is it to pay for tax cuts for the rich? There is a lot of anger that the relatively thin budget line of NASA—less than one-half of 1 percent of the federal budget—is being sliced for such purposes.
Will the dream of interstellar travel soon become reality? Experts have been working for some time on concepts that will one day enable us to enter foreign star systems. Until now, the vast expanses of space have always thwarted this ambitious desire – after all, even the Alpha Centauri system, which is only 4.34 light-years away, is tens of thousands of travel years away with our current means! But now NASA has presented a revolutionary propulsion technology that should get us to the star system of our dreams in just 40 years! But how does the groundbreaking Sunbeam drive work? What technical tricks will make the vast distances of the cosmos seem forgotten – and when will the first interstellar research probe leave Earth?
Previous NOM4D experiments have gone so well, says project leader, that it’s time to get real.
Earth is 4.5 billion years old… modern humans are only 300,000 years old. The history of our species on this planet is incredible, but there are theories that humankind is actually much more spread out across the universe!
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“Just like tuning forks of different material will have different pure tones, remnants described by different equations of state will ring down at different frequencies,” Rezzolla said in a statement. “The detection of this signal thus has the potential to reveal what neutron stars are made of.”
Gravitational waves were first suggested by Albert Einstein in this 1915 theory of gravity, known as general relativity.