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nounPlural auroras, Plural aurorae ɔːˈrɔːrə 1A natural electrical phenomenon characterized by the appearance of streamers of reddish or greenish light in the sky, especially near the northern or southern magnetic pole. The effect is caused by the interaction of charged particles from the sun with atoms in the upper atmosphere. In northern and southern regions it is respectively called aurora borealis or Northern Lights and aurora australis or Southern Lights. 极光（一种自然的光现象，特点是天空中出现呈红色或绿色的光，多发生在南北磁极附近，由来自太阳的带电粒子与地球大气层外层的原子相互作用所致，在北极和南极地区分别称作北极光和南极光） Example sentencesExamples - He expanded on their work by pulling in historical records of auroras, naked-eye sunspots, and eclipses.
- The Hubble Space Telescope has spotted auroras near the poles of both Saturn and Jupiter.
- Although the solar wind produces beautiful auroras, it can also cause a variety of undesirable consequences.
- A typical example of how both missions will co-operate is the study of the magnetic substorms producing the bright aurorae.
- Experts used to think it was just a matter of the air being heated by particles and electric currents in the regions around the poles, where auroras occur.
- Bound to the Earth, our only naturally occurring experience with space weather comes from what we can see with our eyes: eclipses, comets, auroras, and sunspots.
- In the southern hemisphere, sky watchers saw the aurora australis over New Zealand, Australia, and South Africa.
- Colorful sky lights called auroras may be active at high latitudes and possibly into northern U.S. states and Europe.
- The eventual physical effects of the storm were minimal - auroras were visible in Boston and other northern U.S. cities, but no satellites or power grids had major failures.
- Gaps in the magnetosphere also allow for one of Earth's most beautiful, eerie phenomena: the aurora borealis, or northern lights.
- As it is, auroras on Earth follow magnetic lines of force that converge at the north and south magnetic poles.
- Birkeland's experiments failed to account for one of the most important traits of auroras: they are common around the polar regions but exceedingly rare at the poles themselves.
- And then last week another big storm that caused auroras and beautiful geo magnetic activity all over the world.
- This causes the phenomenon called the northern lights, also known as the aurora borealis.
2literary The dawn. 〈诗/文〉晨曦 Synonyms daybreak, break of day, crack of dawn, sunrise, first light, daylight, first thing in the morning, early morning, cockcrow
Derivativesadjective ɔːˈrɔːrəl Nevertheless, the potential exists for periods of strong auroral storm conditions developing during the next several days (at least). Example sentencesExamples - But, as the team observed, although Saturn's aurora do share characteristics with the other planets, they are fundamentally unlike the auroral displays on either Earth or Jupiter.
- During auroral light shows, extraneous electric currents would flow through the wires, superseding the normal telegraph currents and making transmission of messages almost impossible.
- There was an exceptional auroral glow over the entire sky.
- Severe solar weather is often heralded by dramatic auroral displays, northern and southern lights, and magnetic storms that occasionally affect satellites, radio communications and power systems.
- Super-energized particles from the radiation belts and from auroral storms can damage the sensitive electronics of satellites.
- Radio waves appear to be tied to the brightest auroral spots.
- Vivid red auroral rays glowed over all over North America, stretching as far south as Arizona, southern California, Mississippi, and Texas.
- A few years ago it was suggested that auroral phenomena could exist on Mars too.
- People as far south as Virginia were treated to fantastic auroral displays in the night sky.
OriginLate Middle English (originally in sense 2): from Latin, 'dawn, goddess of the dawn'. sense 1 dates from the early 18th century. Rhymesabhorrer, adorer, Andorra, angora, aura, bora, Bora-Bora, borer, Camorra, Cora, corer, Dora, Eleonora, Eudora, explorer, fedora, flora, fora, ignorer, Isadora, Kia-Ora, Laura, Leonora, Maura, menorah, Nora, pakora, Pandora, pourer, roarer, scorer, senhora, señora, signora, snorer, soarer, Sonora, sora, storer, Theodora, Torah, Tuscarora, Vlorë proper nounɔːˈrɔːrə Roman Mythology proper nounɔːˈrɔːrə 1A city in north central Colorado, east of Denver; population 319,057 (est. 2008). 2An industrial city in northeastern Illinois; population 171,782 (est. 2008).
noun 1A natural electrical phenomenon characterized by the appearance of streamers of reddish or greenish light in the sky, usually near the northern or southern magnetic pole. The effect is caused by the interaction of charged particles from the sun with atoms in the upper atmosphere. In northern and southern regions it is respectively called aurora borealis or Northern Lights and aurora australis or Southern Lights Example sentencesExamples - Experts used to think it was just a matter of the air being heated by particles and electric currents in the regions around the poles, where auroras occur.
- Birkeland's experiments failed to account for one of the most important traits of auroras: they are common around the polar regions but exceedingly rare at the poles themselves.
- As it is, auroras on Earth follow magnetic lines of force that converge at the north and south magnetic poles.
- He expanded on their work by pulling in historical records of auroras, naked-eye sunspots, and eclipses.
- This causes the phenomenon called the northern lights, also known as the aurora borealis.
- The Hubble Space Telescope has spotted auroras near the poles of both Saturn and Jupiter.
- And then last week another big storm that caused auroras and beautiful geo magnetic activity all over the world.
- The eventual physical effects of the storm were minimal - auroras were visible in Boston and other northern U.S. cities, but no satellites or power grids had major failures.
- Gaps in the magnetosphere also allow for one of Earth's most beautiful, eerie phenomena: the aurora borealis, or northern lights.
- In the southern hemisphere, sky watchers saw the aurora australis over New Zealand, Australia, and South Africa.
- A typical example of how both missions will co-operate is the study of the magnetic substorms producing the bright aurorae.
- Although the solar wind produces beautiful auroras, it can also cause a variety of undesirable consequences.
- Colorful sky lights called auroras may be active at high latitudes and possibly into northern U.S. states and Europe.
- Bound to the Earth, our only naturally occurring experience with space weather comes from what we can see with our eyes: eclipses, comets, auroras, and sunspots.
2literary in singular The dawn. 〈诗/文〉晨曦 Synonyms daybreak, break of day, crack of dawn, sunrise, first light, daylight, first thing in the morning, early morning, cockcrow
OriginLate Middle English (originally in aurora (sense 2)): from Latin, ‘dawn, goddess of the dawn’. aurora (sense 1) dates from the early 18th century. proper noun Roman Mythology Goddess of the dawn. Greek equivalent Eos
proper noun 1A city in north central Colorado, east of Denver; population 319,057 (est. 2008). 2An industrial city in northeastern Illinois; population 171,782 (est. 2008).
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