How can we test whether gravity is quantum?AndreusK/Getty Images/iStockphoto Physicists have competing ideas about what quantum gravity is, but have not yet conclusively decided whether the…
Exoplanets that get too close to their parent stars are exposed to harsh environmentsNazarii_Neshcherenskyi/Shutterstock The distant Earth-sized planet orbits so close to its parent star that…
Artistic illustration of a floating planetMaspix/Alamy The Sun’s gravity could potentially capture objects, such as interstellar comets or rogue planets, from as far away as 3.8…
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