2022
How to distinguish authenticity of K gold diamond ring
I bought a K gold diamond ring at Jinlu Jewelry, and I didn't want to identify the appraisal agency to identify it and know if it was as good as when I bought it, so I would like to ask everyone! Thanks!
Electrical safety tips on inverters
The inverter and the solar extension cable are the busiest components in the PV system, and also the components that need the most care in the PV system. An effective understanding of inverter-related safety knowledge can not only successfully complete the construction of photovoltaic system connected to the grid, but also minimize the electrical risk …
640 light years away, Betelgeuse has already blown up once, but it's now trying to heal itself
Betelgeuse, the bright star in Earth's night sky, has been of interest to astronomers for more than 200 years. Betelgeuse is of great interest because it's a red supergiant. Located 640 to 720 light-years from Earth, it could go supernova at any time. It's also targeted because of the frequent changes in brightness that precede …
Japan has discovered super-Earths: four times the mass of Earth, with just 11 days in a year
Beyond the observable universe, space is still expanding at a speed exceeding the speed of light. It can be said that the universe is vast, and it has become too big for human beings to imagine. But there is a question that always bothers scientists, and also bothers ordinary people like us, Are humans alone …
From the Earth to the Sloan Wall, the observable universe stretches beyond human imagination
Being curious, humans in ancient times would often look up at the stars and wonder what the outside world would be like. Before science and technology came into the human world, most people thought that the earth was the center of the universe, the head of the stars and the sun are part of the …