Explanation: An unusual triangle of light will be particularly bright near the eastern horizon before sunrise during the next two months for observers in Earth's northern hemisphere. Once considered a false dawn, this triangle of light is actually Zodiacal Light, light reflected from interplanetary dust particles. The triangle is clearly visible on the left of the above frame taken from Mauna Kea in Hawaii on September 8 by one of the developing global network of fisheye nighttime web cameras, called CONCAMs, of the Night Sky Live Project. Zodiacal dust orbits the Sun predominantly in the same plane as the planets: the ecliptic. Zodiacal light is so bright this time of year because the dust band is oriented nearly vertical at sunrise, so that the thick air near the horizon does not block out relatively bright reflecting dust. Zodiacal light is also bright for people in Earth's northern hemisphere in March and April just after sunset.

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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Publikacii s klyuchevymi slovami: zodiacal light - zodiakal'nyi svet Publikacii so slovami: zodiacal light - zodiakal'nyi svet
Sm. takzhe: Zodiakal'nyi svet s Veneroi i Yupiterom Mlechnyi Put' i zodiakal'nyi svet nad kamennymi shpilyami v Avstralii Duel' na nochnom nebe Zodiakal'naya noch' Zodiakal'nyi svet i Mars Mlechnyi Put' nad kamennymi shpilyami v Avstralii Mlechnyi Put' i zodiakal'nyi svet nad Chili Vse publikacii na tu zhe temu >>