 |
On the 13th, NASA launched a high-energy X-ray space telescope from the Marshall Islands in the Pacific Ocean to observe the universe such as black holes.
This telescope is called "Nuclear Spectral Telescope Array" ("Nuclear Star" for short). At 1100 U.S. Eastern Time (at 2300 GMT), the "Nuclear Star" and its launch vehicle were carried into the air by an aircraft. After about an hour, the two were dropped off and the rocket started to ignite after free-falling for a few seconds. The "nuclear star" was then pushed into orbit. The NASA said that the "Nuclear Star" solar panels are currently fully deployed and all communication with the ground is normal.
The "nuclear star" has a cost of about 170 million U.S. dollars. It is part of the U.S. low-cost small-scale detector project. Its air-launch mode saves fuel costs compared with terrestrial launches.
In addition to black holes, the "nuclear star" can also observe other X-ray sources such as neutron stars and sundial. Fiona Harrison, chief scientist at the Nuclear Star Institute and a professor at the California Institute of Technology, said that the "nuclear star" is the first telescope dedicated to high-energy X-rays. Its image resolution is better than any other telescope in the same spectral region. At least 10 times higher, the sensitivity is increased by at least 100 times.
The "Nuclear Star" was originally scheduled to launch in March of this year, but the rocket software failure caused the launch to be postponed. (Reporter Ren Haijun)
A ballcock (also balltap or float valve) is a mechanism or machine for filling water tanks, such as those found in flush toilets, while avoiding overflow and (in the event of low water pressure) backflow. The modern ballcock was invented by José Antonio de Alzate y RamÃrez, a Mexican priest and scientist, who described the device in 1790 in the Gaceta de Literatura Méxicana.[1] It consists of a valve connected to a hollow sealed float by means of a lever, mounted near the top of the tank. The float is often ball-shaped, hence the name ballcock. The valve is connected to the incoming water supply, and is opened and closed by the lever which has the float mounted on the end. When the water level rises, the float rises with it; once it rises to a pre-set level, the mechanism forces the lever to close the valve and shut off the water flow. This is an example of negative feedback and of proportional control.
Ball Cock, Brass Ball Bibcock, Ballcock Valve, Toilet Ballcock Valve
ZHEJIANG KINGSIR VALVE CO., LTD. , https://www.kingsir-valve.com