auroras [地物] 极光
曙光
朝霞
晨曦(aurora的名词复数)
- The oval was at high altitude and high latitude, so scientists think the oval may have been associated with Jupiter's powerful auroras.
由于椭圆形环状体处在高海拔和高纬度,所以,科学家认为椭圆形环状体可能与木星强大的极光有关。 - In an upcoming issue of Geophysical Research Letters, a team reports that the variations in radio signal coincide with the intensity of the planet's auroras.
在即将出版的《地球物理学研究快报》上,一个研究小组报道说,无线电信号的变化跟土星极光的强度正好一致。 - In the Northern Hemisphere, auroras are more commonly seen at high latitudes near the Arctic Circle, such as northern Alaska, Canada, and Scandinavia.
在北半球,靠近北极圈的高纬度地区极光更为常见,比如阿拉斯加北部、加拿大、和斯堪迪纳维亚地区。
Aurora \Au*ro"ra\, n.; pl. E. {Auroras}, L. (rarely used)
{Auror[ae]}. [L. aurora, for ausosa, akin to Gr. ?, ?, dawn,
Skr. ushas, and E. east.]
1. The rising light of the morning; the dawn of day; the
redness of the sky just before the sun rises.
2. The rise, dawn, or beginning. --Hawthorne.
3. (Class. Myth.) The Roman personification of the dawn of
day; the goddess of the morning. The poets represented her
a rising out of the ocean, in a chariot, with rosy fingers
dropping gentle dew.
4. (Bot.) A species of crowfoot. --Johnson.
5. The aurora borealis or aurora australis (northern or
southern lights).
{Aurora borealis}, i. e., northern daybreak; popularly called
northern lights. A luminous meteoric phenomenon, visible
only at night, and supposed to be of electrical origin.
This species of light usually appears in streams,
ascending toward the zenith from a dusky line or bank, a
few degrees above the northern horizon; when reaching
south beyond the zenith, it forms what is called the
corona, about a spot in the heavens toward which the
dipping needle points. Occasionally the aurora appears as
an arch of light across the heavens from east to west.
Sometimes it assumes a wavy appearance, and the streams of
light are then called merry dancers. They assume a variety
of colors, from a pale red or yellow to a deep red or
blood color. The
{Aurora australis}is a corresponding phenomenon in the
southern hemisphere, the streams of light ascending in the
same manner from near the southern horizon.