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On Macs we also like to use MPV and Movist.

The planet hunter is designed to find planets that are about the size of Earth in the habitable zones of stars that are smaller and dimmer than our sun.com\/jw\/2017\/5\/c7d609f0-728b-d905\/mp4\/720.

com\/jw\/2017\/5\/c7d609f0-728b-d905\/dash.Perhaps some world with liquid water on its surface exists not far from our own home planet.TESS! Our favorite new NASA mission -- called TESS.

meaning that it will detect small dips in a stars light that occur when a planet passes across the face of its star from TESSs perspective.Most of the worlds that Kepler found circle stars that are exceedingly far from our own.

but TESS is designed to find worlds in our cosmic backyard by comparison.

space and science stories?Sign up for Mashables weekly Light Speed newsletter.This bottom portion of the rocket contains nine custom-built engines.

which today is the equivalent of more than $3.Credit: spacexReusable rocketry is a foundational reason why SpaceX has become one of the worlds top rocket companies.

there may be comfort in knowing theres a way back home.Via GiphyBut SpaceX believes its greater ambitions -- to visit and set up shop in far-off parts of space like the moon and Mars -- also requires reusability.