Archive for the ‘satellites’ category: Page 8

Jun 10, 2021

China set to launch first astronauts to space station with Shenzhou-12

Posted by in categories: engineering, satellites

HELSINKI — China rolled out a Long March 2F rocket Wednesday in preparation to send the Shenzhou-12 spacecraft and three astronauts to an orbiting space station module.

The Long March 2F rocket was vertically transferred to its pad at the Jiuquan Satellite Launch Center in the Gobi Desert, the China Manned Space Engineering Office (CMSEO) announced Wednesday.

The rocket will send Shenzhou-12 and three astronauts to the Tianhe core module for China’s space station which launched April 28 Eastern.

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Jun 10, 2021

Novel liquid crystal metalens offers electric zoom

Posted by in categories: chemistry, nanotechnology, satellites

Researchers from Cornell University’s School of Applied and Engineering Physics and Samsung’s Advanced Institute of Technology have created a first-of-its-kind metalens—a metamaterial lens—that can be focused using voltage instead of mechanically moving its components.

The proof of concept opens the door to a range of compact varifocal lenses for possible use in many imaging applications such as satellites, telescopes and microscopes, which traditionally focus light using curved lenses that adjust using mechanical parts. In some applications, moving traditional glass or plastic lenses to vary the focal distance is simply not practical due to space, weight or size considerations.

Metalenses are flat arrays of nano-antennas or resonators, less than a micron thick, that act as focusing devices. But until now, once a metalens was fabricated, its was hard to change, according to Melissa Bosch, doctoral student and first author of a paper detailing the research in the American Chemical Society’s journal Nano Letters.

Jun 1, 2021

Germany readies subsidies for satellite internet providers such as Starlink

Posted by in categories: Elon Musk, internet, satellites

Germany wants to help citizens in rural areas get better access to the world wide web by supporting the purchase of hardware for satellite internet services such as Elon Musk’s Starlink, the transport ministry said on Monday.

The planned subsidy scheme will be open to all providers who offer wireless internet connections in rural areas, for example through satellites or directional radio links, the ministry said.

Coalition talks about the details of the voucher scheme are still ongoing and the aim is to subsidize the purchase of the technical equipment, it added.

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May 31, 2021

Space Debris Has Hit And Damaged The International Space Station

Posted by in categories: robotics/AI, satellites

The inevitable has occurred. A piece of space debris too small to be tracked has hit and damaged part of the International Space Station — namely, the Canadarm2 robotic arm.

The instrument is still operational, but the object punctured the thermal blanket and damaged the boom beneath. It’s a sobering reminder that the low-Earth orbit’s space junk problem is a ticking time bomb.

Obviously space agencies around the world are aware of the space debris problem. Over 23000 pieces are being tracked in low-Earth orbit to help satellites and the ISS avoid collisions — but they’re all about the size of a softball or larger.

May 30, 2021

NASA: This Asteroid Will Get So Close It Could Smash Into Earth’s Satellites

Posted by in category: satellites

NASA scientists say that an asteroid that sped past Earth on Friday will get close enough to potentially collide with orbiting satellites in 2029.

May 27, 2021

SpaceX Starlink: how it could kickstart an ‘uncontrolled experiment’

Posted by in categories: engineering, internet, satellites

In a paper for Nature this month, researchers claim the development of mega-constellations like Starlink “risks multiple tragedies of the commons, including tragedies to ground-based astronomy, Earth orbit, and Earth’s upper atmosphere.”

Perhaps the biggest effects could come as the satellites start to deorbit, sparking what could be a major experiment in geoengineering.

This week’s SpaceX launch is the 29th batch of Starlink satellites since the first in May 2019, building out the firm’s internet connectivity constellation. Starlink aims to offer high-speed and low latency internet access almost anywhere with a view of a ground terminal.

Continue reading “SpaceX Starlink: how it could kickstart an ‘uncontrolled experiment’” »

May 24, 2021

Starlink: A Review And Some Hacks

Posted by in categories: cybercrime/malcode, internet, satellites

I could probably be described as a SpaceX enthusiast. I catch their launches when I can, and I’ve watched the development of Starship with great interest. But the side-effect of SpaceX’s reusable launch system is that getting to space has become a lot cheaper. Having excess launch capacity means that space projects that were previously infeasible become suddenly at least plausible. One of those is Starlink.

Starlink is SpaceX’s satellite Internet service. Wireless and cellular internet have helped in some places, but if you really live out in the sticks, satellite internet is your only option. And while satellite Internet isn’t exactly new, Starlink is a bit different. Hughesnet, another provider, has a handful of satellites in geostationary orbit, which is about 22000 miles above the earth. To quote Grace Hopper, holding a nearly foot-long length of wire representing a nanosecond, “Between here and the satellite, there are a very large number nanoseconds.”

Continue reading “Starlink: A Review And Some Hacks” »

May 21, 2021

Europe unveils plans to bring ‘GPS’ and Skype to the moon with satellites

Posted by in category: satellites

Europe is developing a lunar navigation and telecommunication constellation, hoping to speed up colonization of Earth’s celestial companion.

May 18, 2021

Tyvak satellite on SpaceX rideshare mission carries tiny space telescope

Posted by in category: satellites

WASHINGTON — The Tyvak-0130 rideshare payload that flew to orbit May 15 on a SpaceX Falcon 9 carries a miniature space telescope for possible commercial use.

The technology was developed by Tyvak Nano-Satellite Systems and the Lawrence Livermore National Laboratory under a four-year agreement to advance compact telescopes for commercial applications, Tyvak’s CEO Christian “Boris” Becker said in an interview with SpaceNews.

Becker, a retired U.S. Navy rear admiral, was recently named chief executive of Tyvak, a satellite manufacturer in Irvine, California, owned by Terran Orbital.

Continue reading “Tyvak satellite on SpaceX rideshare mission carries tiny space telescope” »

May 17, 2021

Watch an Atlas V rocket launch US Space Force missile-warning satellite today

Posted by in category: satellites

Liftoff is at 1:42 p.m. EDT (1742 GMT).

CAPE CANAVERAL, Fla. — United Launch Alliance (ULA) will launch an Atlas V rocket into space today (May 17), and you can watch the action live online.

Continue reading “Watch an Atlas V rocket launch US Space Force missile-warning satellite today” »

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