Gravity has become an unlikely viral villain, blamed for an imagined global blackout in which the planet briefly lets go of everything that is not nailed down. At the same time, some of the most ...

Gravity keeps Earth stable and habitable, holding the atmosphere, oceans, buildings, and people firmly in place. Without it, air and water would vanish into space, and life would end almost instantly.

The Juno spacecraft now orbiting Jupiter has a suite of science instruments which will investigate the existence of a possible solid planetary core, map Jupiter’s intense magnetic field, measure the ...