by APOD Robot » Tue Feb 27, 2018 5:08 am
Dueling Bands in the Night
Explanation: What are these two bands in the sky? The more commonly seen band is the one on the right and is the central band of
our Milky Way galaxy. Our
Sun orbits in the disk of this
spiral galaxy, so that from inside, this disk
appears as a band of comparable brightness all the way around the sky. The
Milky Way band can also be seen all year -- if out
away from city lights. The less commonly seen band, on the left, is
zodiacal light -- sunlight reflected from dust orbiting the Sun in our Solar System.
Zodiacal light is brightest near the Sun and so is best seen just before sunrise or just after sunset. On some evenings in the north, particularly during the months of March and April, this ribbon of
zodiacal light can appear quite prominent after sunset. It has
recently been determined that zodiacal dust was mostly expelled by comets that have passed
near Jupiter. Only at certain times of the year will the two bands be seen side by side, in parts of the sky, like this. Here the two streaks of light appear like the continuation of the banks of the
Liver River into the sky. The
featured panorama of consecutive exposures was recorded about three weeks ago in
North Jutland,
Denmark.
[/b]
[url=https://apod.nasa.gov/apod/ap180227.html][img]https://apod.nasa.gov/apod/calendar/S_180227.jpg[/img] [size=150]Dueling Bands in the Night[/size][/url]
[b] Explanation: [/b] What are these two bands in the sky? The more commonly seen band is the one on the right and is the central band of [url=https://imagine.gsfc.nasa.gov/science/objects/milkyway1.html]our Milky Way galaxy[/url]. Our [url=https://solarsystem.nasa.gov/solar-system/sun/overview/]Sun[/url] orbits in the disk of this [url=https://apod.nasa.gov/apod/ap170917.html]spiral galaxy[/url], so that from inside, this disk [url=https://apod.nasa.gov/apod/ap170328.html]appears as a band[/url] of comparable brightness all the way around the sky. The [url=https://apod.nasa.gov/apod/ap110710.html]Milky Way band[/url] can also be seen all year -- if out [url=https://petapixel.com/2017/02/09/light-pollution-changes-view-orion-constellation/]away from city lights[/url]. The less commonly seen band, on the left, is [url=https://en.wikipedia.org/wiki/Zodiacal_light]zodiacal light[/url] -- sunlight reflected from dust orbiting the Sun in our Solar System. [url=https://apod.nasa.gov/apod/ap070925.html]Zodiacal light[/url] is brightest near the Sun and so is best seen just before sunrise or just after sunset. On some evenings in the north, particularly during the months of March and April, this ribbon of [url=https://apod.nasa.gov/apod/ap040825.html]zodiacal light[/url] can appear quite prominent after sunset. It has [url=http://adsabs.harvard.edu/abs/2010ApJ...713..816N]recently been determined[/url] that zodiacal dust was mostly expelled by comets that have passed [url=https://apod.nasa.gov/apod/ap180226.html]near Jupiter[/url]. Only at certain times of the year will the two bands be seen side by side, in parts of the sky, like this. Here the two streaks of light appear like the continuation of the banks of the [url=https://da.wikipedia.org/wiki/Liver_%C3%85]Liver River[/url] into the sky. The [url=https://www.facebook.com/rmsphotography95/photos/a.386953088074201.1073741828.386951604741016/1194712643964904/?type=3&theater]featured panorama[/url] of consecutive exposures was recorded about three weeks ago in [url=https://en.wikipedia.org/wiki/North_Denmark_Region]North Jutland[/url], [url=https://en.wikipedia.org/wiki/Denmark]Denmark[/url].
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