Light is shifted towards the long wavelength, red end of the spectrum. This tells us that: other galaxies are moving away from our galaxy; the Universe is expanding. Astronomers have found that ...

Light from a star in a distant galaxy is shifted towards the long wavelength, red end of the spectrum. This tells us that: other galaxies are moving away from our galaxy; the Universe is expanding.

A tiny red speck, spotted by the James Webb Space Telescope, has set a date on an important era in the Universe's history. The speck, known as JADES-GS-z13-1-LA, is one of the earliest galaxies ever ...

Hubble's brilliant observation was that the red shift of galaxies was directly proportional to the distance of the galaxy from earth. That meant that things farther away from Earth were moving ...