auroral


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
Related to auroral: auroral oval

auroral

[ə′rȯr·əl]
(astronomy)
The period of dusk before sunrise.
References in periodicals archive ?
The researchers then coupled the satellite data with photos of STEVE taken by amateur auroral photographers to figure out what causes the unusual glow.
Nice trip through the southern auroral zone tonight on #flighttothelights Naked eye auroras were spectacular photographically!
When a particularly strong burst of particles from the Sun hits Saturn, it can cause the magnetotail to collapse, with the ensuing disturbance of the planet's magnetic field resulting in spectacular auroral displays.
Aurora observers tend to look forward to the equinoxes as the frequency of auroral displays usually increases around these times.
In indigenous circumpolar communities auroral manifestations were associated with traditional beliefs, many of them supernatural in content: their luminosity could be interpreted as the torches of spirits of the recently deceased, their motions as spirits (or children who died still-born) playing football, and their sounds as voices coming from the otherworld.
"There is a phenomenon called the auroral oval, which is essentially a halo that goes around the globe at a latitude north of the Arctic Circle--that is where the auroral activity is concentrated."
"In the centre of the image, Orion the hunter is just visible through the bright auroral display.
The landscape is relatively flat, so the full auroral display can be seen from most vantage points.
The auroral displays are associated with the solar wind - electrically charged particles continuously spewing outward from the sun.
THE THEORY: The Air Force and Navy say that their High Frequency Active Auroral Research Program (HAARP) in Gakona, Alaska, does cutting-edge research into the mysteries of the upper atmosphere.