The Space-time Continuum

ongoing continuously without stopping

He complained about the perpetual noise from the construction site.

relating to the sudden, reflective, and involuntary movement or contraction of muscles

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

The winter solstice marks the shortest day and longest night of the year, a time when darkness holds sway over the land and the world seems to stand still.

the specific day that an event turns 200 years old

The city celebrated the bicentenary of its founding with a grand parade.

relating to or occurring once every hundred years

The university is hosting a series of centenary lectures throughout the year to mark its 100-year anniversary.

primarily active or occurring during the daytime

Most birds are diurnal, chirping and foraging for food as soon as the sun rises.

a period of time in history or someone's life, during which significant events happen

The Renaissance was an epoch of great cultural and artistic achievements in Europe.

(astronomy) either of the two celestial points at which the celestial equator intersects the ecliptic

(of time) to pass by

Hours elapsed as they waited for the train to arrive.

relating to a time span of a thousand years

The ancient ruins provide insights into millennial civilizations.

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

The flight schedule was based on Greenwich Mean Time.

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

After years of hard work and dedication, he finally achieved his eventual goal of becoming a successful entrepreneur.

at the appropriate or expected time, without rushing or delay

The details of the project will be revealed to the team in due course.

to gradually decrease in intensity, strength, importance, size, influence, etc.

The popularity of the trend is currently waning among the younger generation.

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

The colors of the sky during twilight were breathtaking, blending shades of orange and purple.

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

Stratospheric ozone helps protect Earth from harmful UV rays.

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

According to Einstein's theory of general relativity, gravity is not just a force between masses but the curvature of space-time caused by those masses.

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

Satellites are placed into specific orbital configurations for communication purposes.

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

The Orion Nebula is a famous example of a stellar nursery.

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

During the eclipse, the moon cast an umbra on the Earth's surface.

to use a thin and warm layer of a substance that is usually made of beeswax to remove unwanted hair from the skin

She waxes her legs every month to keep them smooth and hair-free.

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

A meteoroid is a small rocky or metallic object in outer space that is significantly smaller than an asteroid and larger than a micrometeoroid.

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

Scientists analyzed the composition of the meteorite that fell in the desert last month.

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

We saw a bright meteor streak across the sky during the meteor shower last night.

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

A magnetic storm, also known as a geomagnetic storm, is a disturbance in Earth's magnetosphere caused by solar wind interactions.

existing or occurring between galaxies

Science fiction often explores the concept of intergalactic civilizations.

existing or occurring between planets

Interplanetary spacecraft like Voyager 1 have traveled beyond our solar system.

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

Interstellar travel involves journeying between star systems within the Milky Way galaxy or beyond.

(specialist) space that consists of more than three dimensions

Scientists are exploring theories about travel through hyperspace.

an entity or being originating from or existing outside Earth

The movie features an extraterrestrial who befriends a young boy.

a planet that is outside the solar system

Astronomers have discovered thousands of exoplanets orbiting stars beyond our solar system.

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

Dark matter is a form of matter that does not emit, absorb, or reflect light, making it invisible and 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

Cosmic dust consists of tiny particles of matter floating in space, primarily composed of elements such as carbon, silicon, and iron.

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

During a total solar eclipse, the corona of the Sun becomes visible as a radiant halo around the moon.

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

Halley's Comet is one of the most famous comets, visible from Earth approximately every 76 years.

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

The aurora australis, also known as the Southern Lights, is a natural light display that occurs in the high-latitude regions of the Southern Hemisphere.

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

The aurora borealis, also known as the Northern Lights, is a natural light display that occurs in the high-latitude regions of the Northern Hemisphere.

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

Orion is a well-known constellation visible in the winter sky.

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

The biosphere includes all ecosystems on Earth.

(Gnosticism) a divine power or nature emanating from the Supreme Being and playing various roles in the operation of the universe