DID YOU KNOW this about grav­ity?

Science Illustrated - - GRAVITY -

A FREE FALL MAKES AS­TRO­NAUTS WEIGHT­LESS

The weight­less­ness of as­tro­nauts in space is not due to the ab­sence of grav­ity. Still in Earth’s grav­i­ta­tional field, they are weight­less, as they are in a free fall to­wards (but around) Earth.

DO NOT BURP IN SPACE

When as­tro­nauts burp, their stom­ach con­tents might fol­low, with­out grav­ity to help sep­a­rate gases from liq­uids.

THE SUN MAKES YOU FAT

An ob­ject that weighs 45 kg on Earth would weigh 1,270 kg on the Sun, be­cause the Sun’s mass is about 333,000 times that of Earth.

MOUN­TAINS BRAKE ROCK

If air re­sis­tance did not ex­ist, a rock would fall more slowly on a moun­tain peak than in a val­ley, as it is fur­ther away from Earth's cen­tre.

THE WEIGHT OF BLACK HOLE

A black hole with a di­am­e­ter of 1 cm weighs just as much as half of Earth. Not even light can es­cape the ex­treme grav­ity.

EARTH WAS LIQ­UID

When Earth was formed from the dust sur­round­ing the Sun, it was ef­fec­tively liq­uid. The only thing holding it to­gether was grav­ity.

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