The gravitational pull of a black hole is so powerful that even light cannot escape from it.

The Laser Interferometer Space Antenna (LISA) is a space mission that will be able to detect gravitational waves.

Scientists have detected gravitational waves.

Mars has two small natural satellites, Phobos and Deimos. They are highly irregular in shape and are believed to be asteroids captured by Mars' weak gravitational field.

Because their rapid pulse of radio emission is so predictable, a large array of well-understood pulsars can be used to measure extremely subtle abnormalities, such as gravitational waves.

Juno will map Jupiter's gravitational and magnetic fields.

The sun exerts a stronger gravitational pull on the moon than does the earth.

Scientists have announced that they have discovered gravitational waves.

It's possible to calculate the Earth's mass using a formula that includes the Moon's rotation period around the sun, the average distance between the Earth and the Moon, the gravitational context and the number π.

LISA will place three spacecraft in orbit around the Sun, tagging along behind Earth. The three spacecraft will be 5 million kilometers apart flying in a triangle formation. When a gravitational wave passes by, these ripples in space gently push the spacecraft around by the tiniest amount imaginable. But the super-super-super sensitive laser beams that connect the three spacecraft will allow this tiny movement to be measured.