cosmological horizon

noun 0.695

horizon

noun 0.683

black hole

noun 0.666

ergosphere

noun 0.616

particle horizon

noun 0.615

edge of the earth

noun 0.605

edge of the world

noun 0.596

white hole

noun 0.580

wormhole

noun 0.578

hyperspace

noun 0.578

zero hour

noun 0.573

escape velocity

noun 0.566

eclipse

noun 0.558

scientific frontier

noun 0.545

dark space

noun 0.544

epoch

noun 0.542

vanishing point

noun 0.536

deep space

noun 0.533

hypersurface

noun 0.529

edge effect

noun 0.525

horosphere

noun 0.525

quantum limit

noun 0.524

ecliptic

noun 0.522

abyss

noun 0.522

extinction event

noun 0.519

point of no return

noun 0.519

supermassive black hole

noun 0.519

umbra

noun 0.519

world ending

noun 0.515

end of the world

noun 0.515

hell on earth

noun 0.514

critical point

noun 0.514

outer space

noun 0.513

space environment

noun 0.512

orbit

noun 0.511

interstellar space

noun 0.511

heliosheath

noun 0.510

solar eclipse

noun 0.510

epicentre

noun 0.510

interstellar extinction

noun 0.506

death zone

noun 0.506

hypervelocity

noun 0.504

apogee

noun 0.504

fore edge

noun 0.503

tachyon

noun 0.502

upper boundary

noun 0.502

brink

noun 0.502

energy field

noun 0.502

transition point

noun 0.501

inside edge

noun 0.500

eclipsing

noun 0.500