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May 23, 2022
SpaceX looks to raise $1.7 billion in new funding, boosting its valuation to $127 billion
Posted by Gemechu Taye in category: space travel
May 23, 2022
Can you reinvent the wheel? Scientists synthesized a new kind of graphene
Posted by Gemechu Taye in category: materials
May 23, 2022
A giant asteroid will zip past Earth on May 27 at 47,200 mph
Posted by Gemechu Taye in category: space
May 23, 2022
The Mind After Midnight: Where Do We Go When We Sleep?
Posted by Gemechu Taye in category: neuroscience
May 23, 2022
Satellite antennas could be 3D printed in space to massively reduce launch costs
Posted by Genevieve Klien in categories: 3D printing, satellites
“Spacecraft antenna designs are challenging due to their conflicting requirements for high gain, wide bandwidth, and low weight,” Mitsubishi announced. “High gain and wide bandwidth necessarily require a large aperture, but economical orbital deployment conventionally dictates that designs be lightweight and small enough to fit or fold inside a launch vehicle or satellite deployment mechanism.”
Mitsubishi also claimed that, with its new technology, ‘additive-manufacturing in space has now become possible.’ However, it’s worth noting that the International Space Station already features a 3D printer launched to the orbital station back in 2014. The European Space Agency also announced last year it would experiment with 3D printing in space using scrap metals from the Moon.
Still, the company’s new method has the potential to reduce the cost of satellite launches significantly, and it could pave the way for the construction of other vital parts for future space missions.
May 23, 2022
New 3D printing method uses light to make objects from opaque resin
Posted by Shubham Ghosh Roy in category: 3D printing
May 23, 2022
Asteroid four times the size of the Empire State Building barreling toward Earth on May 27
Posted by Alberto Lao in categories: asteroid/comet impacts, existential risks
The asteroid will zoom safely past Earth at 47,200 miles per hour.
The near-Earth asteroid 7,335 (1989 JA) will make a close approach to our planet on May 27, 2022, flying within about 2.5 million miles of Earth.
May 23, 2022
A Spacecraft Just Recorded The Lunar Eclipse Like You’ve Never Witnessed It Before
Posted by Alberto Lao in category: biotech/medical
A total lunar eclipse is an incredible sight. As Earth passes between the Moon and the Sun, its shadow slips across the face of our satellite so only long, red wavelengths – sunlight refracted by Earth’s atmosphere – can slip through, tinting the usually pale Moon blood-red.
That’s when we see it from here, on our planet. But from space, the view is very different – and now we can see what that looks like, thanks to the asteroid probe Lucy, led by the Southwest Research Institute (SwRI), launched in October 2021.
May 23, 2022
New electronics cooling tech enables 740% increase in power per unit volume
Posted by Shubham Ghosh Roy in categories: engineering, materials
Tarek Gebrael, a UIUC Ph.D. student in mechanical engineering, explains that the existing solutions suffer from three shortcomings – first, they can be expensive and difficult to scale up. Second, conventional heat spreading approaches generally require that the heat spreader and a heat sink be attached on top of the electronics device. Unfortunately, in many cases, most of the heat is generated underneath the electronic devices, meaning that the cooling mechanism isn’t where it is needed the most.
And third, Gebrael explained, the heat spreaders can’t be installed directly on the surface of the electronics. They require a layer of “thermal interface material” sandwiched between them to ensure good contact. However, due to its poor heat transfer characteristics, that middle layer also introduces a negative impact on thermal performance.
Now, researchers have come up with a new solution to address all three of those problems. First, they used copper as a primary material, which is relatively inexpensive. They then made the copper coating that entirely “engulfs” the device, says Gebrael, “covering the top, the bottom, and the sides… a conformal coating that covers all the exposed surfaces” – so that no heat-producing regions are neglected. And finally, the new solution removes the need for a thermal interface material and a heat sink.
