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Hollywood has made many sci-fi
about asteroids crashing into Earth and destroying us
. The U.S. space agency NASA may have an
to this end-of-the-world possibility. It has tested a spacecraft that could change the
of an asteroid that might hit our
. The spacecraft is called DART, which means Double Asteroid Redirection Test. The $325m
set off on its
in November 2021. Its goal was to crash into an asteroid called Dimorphos. The
was a success. DART collided with the centre of the asteroid at 24,000 kph on Monday. Scientists do not yet know if they have changed the asteroid's direction. They will find out from
they will get in a few weeks'
.