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Current issue

ELEKTRO 7/2021 was released on October 1st 2021. Its digital version will be available on November 1st 2021.

Topic: Power engineering; Electricity quality; Renewable Energy

Main article
Local specifics of South-Bohemian region regarding usage of alternative fuel cars

SVĚTLO (Light) 4-5/2021 was released 9.17.2021. Its digital version will be available 9.17.2021.

Lighting installations
Lighting reconstruction of underpass and platforms of Ústí nad Orlicí railway station

Public lighting
The lighting of park at Episcopal Residence of Ostrava-Opava in Ostrava
Outdoor lighting systems and intrusive light
Generel of public lighting 9th part
Environmental viewpoint

SpaceX launches first 60 satellites of its internet network

24. 5. 2019 | Phys.org | www.phys.org

SpaceX launched a rocket carrying the first 60 satellites of its "Starlink" constellation, which is intended to provide internet from space and could one day number 12,000 satellites.

One of the company's Falcon 9 rockets blasted off without incident from Cape Canaveral in Florida around 10:30 pm (0230 GMT). An hour later, the rocket began to release the satellites at an altitude of 280 miles (450 kilometers). The satellites then had to separate and use their thrusters to take up their positions in a relatively low orbit of 340 miles (550 kilometers).

SpaceX satellites

That is slightly higher than the International Space Station, but well below the majority of terrestrial satellites, the highest of which sit in a geostationary orbit of 22,400 miles (36,000 kilometers). Each of the satellites weighs just 227 kilograms (500 pounds) and was built in-house in Redmond, near Seattle. Starlink will become operational once 800 satellites have been activated, which will require a dozen more launches.

Read more at Phys.org

Image Credit: SpaceX

-jk-