The high-resolution image of the Andromeda Galaxy taken by China's Wide Field Survey Telescope. [Photo/CCTV News] Utilizing the spectrum data gathered by the Large Sky Area Multi-Object Fiber ...

The terms weight and mass are often used incorrectly. Phrases like ‘a bag of sugar weighs 1 kg’ are not scientifically correct. This means that a 1 kg mass would be attracted to Earth by a force of 10 ...