Essential Vocabulary for the GRE - The Space-time Continuum

continuing forever or indefinitely into the future

occurring in sudden, brief manner, without a regular order or time

either of the two times of the year when the sun reaches its farthest or closest distance from the equator

the specific day that an event turns 200 years old

the day that an event becomes 100 years old

having a cycle that happens on a daily basis

a subdivision of a geologic period, characterized by distinctive and globally recognizable rock layers, fossils, and significant changes in Earth's climate and biota

either of the two moments in a year when the Sun, in its apparent motion along the ecliptic, crosses the celestial equator, resulting in approximately equal periods of daylight and darkness worldwide

(of time) to pass by

relating to a time span of a thousand years

the time as measured at Greenwich, London, on the line of 0° longitude, used to calculate the time across the globe

happening at the end of a process or a particular period of time

at the appropriate or expected time, without rushing or delay

(of the moon) to gradually decrease in its visible illuminated surface as it progresses from full to new moon

the time in the evening when the sun is below the horizon

the second layer of earth's atmosphere composed of cool and warm layers of air

the theory that adds the notion of time to that of a three-dimensional space

relating to the path or motion of an object as it revolves around another object in space

a glowing cloud of gas and dust in outer space, often the result of a star explosion or formation

the part of a shadow that is completely dark; caused by acute light blockage

(of the moon) to progressively display a larger illuminated section until it turns into a full moon

a small celestial body that becomes visible as a meteor upon entrance into the atmosphere of the earth

a piece of rock or metal from space that has hit the surface of the earth

a piece of rock coming from outer space that passes through the Earth's atmosphere, producing light

a disruption in earth's magnetic field caused by solar activity, resulting in variations that can impact electronic systems and communications on earth

existing or occurring between galaxies

existing or occurring between planets

situated or occurring between stars or within the space that exists between stars

(specialist) space that consists of more than three dimensions

relating to or originating from outside the Earth or its atmosphere

a planet that is outside the solar system

(physics) an invisible substance that makes up most of the universe's mass, detectable only through its gravitational effects

very small particles originally derived from stars, serving as raw material for forming planets, and existing between galaxies, stars, and other celestial bodies

the outer layer of the Sun's atmosphere, observable as a plasma halo during a solar eclipse

an object in space that is a mass of ice and dust and when it nears the sun it starts illuminating in the shape of a tail

the colored lights, mainly green and red, in the sky seen primarily near the southern magnetic pole

the colored lights, mainly green and red, in the sky seen primarily near the northern magnetic pole

a specific group of stars that form a pattern and have a name related to their shape

a part of planet where the air, land, and water are suitable for all the living things to exist on

an endless or lengthy period of time