Gravitational lenses allow you to measure the expansion of the Universe.
Space and Ufo
Vintage NASA satellite falls to Earth, meets fiery doom after 56 years in space
The sun may have a long-lost twin
US spy satellite launch delayed a week after abort in final seconds
Lab confirms first case of coronavirus reinfection in the US
New quantum paradox throws the foundations of observed reality into question
Is the Y chromosome dying out?
How long is a galactic year?
Black hole ‘hair’ could be detected using ripples in spacetime
How to build a universe after a big bounce
The end of the universe may be marked by ‘black dwarf supernova’ explosions
Clouds of star-forming gas are being shot ‘like bullets’ across the galaxy
