How astronomers used gravitational lensing to discover 44 new stars in distant galaxy
NASA's James Webb Space Telescope has captured a unique image that revealed 44 individual stars in a galaxy 6.5 billion light ...
BBC1 年
The expanding Universe Redshift
Figure caption, Lower diagram shows spectrum of light redshifted from a distant galaxy moving away from the Earth The upper diagram shows the absorption spectrum from a stationary galaxy with one ...