Explore 27 English words about time and space with pronunciation, definitions and example sentences.
a period of 12 months based on which a company, government or individual does financial reporting or budgeting
"The fiscal year ends."
"The company starts its new fiscal year on the first of April every year regularly."
a hypothetical structure that connects regions of space-time that are far apart
"A theoretical wormhole."
"Scientists study theoretical wormhole as possible shortcut through space and time in physics."
(of time) to pass by
"Time will elapse."
"Several hours elapsed before the doctor finally came out of the operating room to update the patient's worried family on his condition."
the time in the evening when the sun is below the horizon
"The twilight was beautiful."
"We walked home in the twilight after dinner."
the theory that adds the notion of time to that of a three-dimensional space
"Space-time is curved."
"Einstein's theory of relativity describes gravity as the curvature of space-time caused by mass."
a usually small meteor that burns with a bright light when entering the earth's atmosphere
"A bright shooting star."
"We were lucky to see a beautiful shooting star crossing the night sky last summer vacation."
a glowing cloud of gas and dust in outer space, often the result of a star explosion or formation
"A nebula is a cloud."
"The Hubble telescope captured stunning images of a colorful nebula where new stars are being born."
a small celestial body that becomes visible as a meteor upon entrance into the atmosphere of the earth
"A meteoroid entered the atmosphere."
"A meteoroid becomes a meteor when it burns in Earth's atmosphere."
the branch of physics that studies celestial objects and phenomena in the universe, such as stars, galaxies, and cosmic radiation
"He studies astrophysics."
"Astrophysics explores the physics of stars and galaxies."
a branch of biology that deals with the study of life in space
"Astrobiology studies space."
"Astrobiology explores the possibility of life on other planets within our solar system and beyond."
the colored lights, mainly green and red, in the sky seen primarily near the northern magnetic pole
"Aurora borealis is beautiful."
"Tourists travel to Norway and Iceland to see the aurora borealis dancing across the night sky."
the colored lights, mainly green and red, in the sky seen primarily near the southern magnetic pole
"We saw aurora australis."
"The aurora australis lights up the southern sky with green and pink curtains of light."
the time as measured at Greenwich, London, on the line of 0° longitude, used to calculate the time across the globe
"Greenwich Mean Time is."
"Greenwich Mean Time is the standard time reference for the whole world every day."
the 100th anniversary of an event or occasion
"The centennial was grand."
"The town organized a big centennial celebration for one hundred years of its founding last year."
the 200th anniversary of an event or occasion
"The bicentennial was celebrated."
"The country celebrated its bicentennial with many special events and parades two hundred years after independence."
continuing forever or indefinitely into the future
"The motion is perpetual."
"The perpetual motion machine is impossible because energy cannot be created from nothing."
the calendar introduced by Pope Gregory XII in 1582, as a modification for the Julian Calendar, presently used in many parts of the world
"The Gregorian calendar is standard."
"Most countries in the world use the Gregorian calendar for daily life and business transactions."
a planet that is outside the solar system
"An exoplanet orbits another star."
"The discovery of an exoplanet in the habitable zone of its star has generated significant scientific interest."
the complete and round-shaped moon as seen from the earth
"See the full moon."
"The full moon illuminated the forest path making it easy to hike without flashlights."
(astronomy) the celestial zone in the sky where the sun, moon, and planets appear to move, traditionally divided into twelve equal segments, each associated with a distinct name and symbol
"The zodiac has twelve signs."
"Astrologers believe that the position of celestial bodies within the zodiac at birth influences personality traits."
occurring once every two years
"It is a biennial event."
"The international conference on sustainable development is a biennial gathering of global experts."
a period of time in history or someone's life, during which significant events happen
"The dinosaur epoch ended sixty five million years ago."
"The Victorian epoch was a period of significant industrial growth and cultural change in British history."
(of the moon) to gradually decrease in its visible illuminated surface as it progresses from full to new moon
"The moon will wane."
"As the lunar cycle progresses, the visible portion of the moon will gradually wane towards the new moon phase."
(of the moon) to progressively display a larger illuminated section until it turns into a full moon
"The moon waxes."
"The moon waxes and wanes in a predictable cycle each month as the amount of its illuminated surface visible from Earth changes gradually."
a star that is relatively small in size or mass and is not very bright
"That star is a dwarf."
"Astronomers discovered a peculiar dwarf star emitting unusual radio signals from a distant galaxy."
denoting the shape of the new moon
"The moon is crescent."
"The artist painted a beautiful landscape featuring a delicate crescent moon in the twilight sky."
an endless or lengthy period of time
"It lasted an eon."
"The geological processes that shaped the Earth occurred over an immense eon of time."
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