If a star orbits a black hole, it will appear from a distance to be orbiting empty space. Gaia projects the star’s orbit on a plane in the sky while ground-based telescopes meanwhile track how light ...

One of the leading concepts is the ‘cosmological constant’ theory, in which the energy of empty space itself causes cosmic acceleration. Another possible theory is known as ‘evolving dark energy’ or ...

Dark matter could also explain certain optical ... of repulsive force generated by quantum fluctuations in otherwise "empty" space. What's more, the force seems to be growing stronger as the ...

your hallway doesn't have to be a forgotten and unloved space. Instead, with a bit of work, some basic bookshelves, and some trim and paint, you can transform your empty hallway into the dark ...