continuing forever or indefinitely into the future

occurring unsteadily 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 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

marking or denoting 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 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

related to the curved flight path of an object around another object in space like moon, sun, and etc.

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

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

existing or taking place in the space between two or more different galaxies

the space or area between planets

in the middle of the stars

(specialist) space that consists of more than three dimensions

relating to the region beyond Earth's solar system

a planet that is outside the solar system

(physics) material existing in space that reflects no light, based on some theories

very small molecules serving as raw material for forming planets and they exist in between galaxies, stars, and etc.; originally derived from the stars

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

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

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