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Keywords: halo, emission nebula
![Мессье 20 и 21](https://images.astronet.ru/pubd/2017/06/28/0001385400/M20_M21CompositeMP1024.preview.jpg)
28.06.2017
The beautiful Trifid Nebula, also known as Messier 20, lies about 5,000 light-years away, a colorful study in cosmic contrasts. It shares this nearly 1 degree wide field with open star cluster Messier 21 (top left).
![Небесный фейерверк: звездное скопление Вестерлунд 2](https://images.astronet.ru/pubd/2017/07/04/0001385719/west2.preview.jpg)
4.07.2017
What if you could go right into a cluster where stars are forming? A one-minute, time-lapse, video visualization of just this has been made with 3D computer modeling of the region surrounding the star cluster Westerlund 2, based on images from the Hubble Space Telescope in visible and infrared light.
![Шарплесс 249 и туманность Медуза](https://images.astronet.ru/pubd/2017/01/07/0001374112/IC443HubblePalette2_8x10flat4bColes1024.preview.jpg)
7.01.2017
Normally faint and elusive, the Jellyfish Nebula is caught in this alluring telescopic mosaic. The scene is anchored below by bright star Eta Geminorum, at the foot of the celestial twin, while the Jellyfish Nebula is the brighter arcing ridge of emission with tentacles dangling below and left of center.
![NGC 6357: туманность Лобстер](https://images.astronet.ru/pubd/2017/02/07/0001375563/LobsterCat_VLT_960.preview.jpg)
7.02.2017
Why is the Lobster Nebula forming some of the most massive stars known? No one is yet sure. Near the more obvious Cat's Paw nebula on the upper right, the Lobster Nebula...
![Ореол с самолетом](https://images.astronet.ru/pubd/2018/06/13/0001415577/PlaneGlory_Larson_960.preview.jpg)
22.12.2016
Looking out the window of an airplane, you might be lucky enough to see "the glory" in the direction directly opposite the Sun. Before airplanes, the phenomenon, known to some as the heiligenschein or the Specter of the Brocken, was sometimes seen from mountaintops.
![Туманность Розетка](https://images.astronet.ru/pubd/2017/02/14/0001375886/Rosette_Souglakos_960.preview.jpg)
14.02.2017
Would the Rosette Nebula by any other name look as sweet? The bland New General Catalog designation of NGC 2237 doesn't appear to diminish the appearance of this flowery emission nebula. Inside the nebula lies an open cluster of bright young stars designated NGC 2244.
![Туманность Чайка](https://images.astronet.ru/pubd/2024/03/13/0001922899/Seagull_Lacroce_1080.preview.jpg)
13.03.2024
A broad expanse of glowing gas and dust presents a bird-like visage to astronomers from planet Earth, suggesting its popular moniker: the Seagull Nebula. This portrait of the cosmic bird covers a 1.6-degree...
![Sh2-132: туманность Лев](https://images.astronet.ru/pubd/2024/06/10/0001931132/LionNeb_Badr_960.preview.jpg)
10.06.2024
Is the Lion Nebula the real ruler of the constellation Cepheus? This powerful feline appearing nebula is powered by two massive stars, each with a mass over 20 times greater than our Sun. Formed...
![Когда розы не красные](https://images.astronet.ru/pubd/2018/02/22/0001399069/RosetteNebulaNBHColesHelm1024.preview.jpg)
22.02.2018
Not all roses are red of course, but they can still be very pretty. Likewise, the beautiful Rosette Nebula and other star forming regions are often shown in astronomical images with a predominately red hue, in part because the dominant emission in the nebula is from hydrogen atoms.
![Чайка и Утка](https://images.astronet.ru/pubd/2018/03/16/0001401467/SeagullVillaverde1024c.preview.jpg)
16.03.2018
Seen as a seagull and a duck, these nebulae are not the only cosmic clouds to evoke images of flight. But both are winging their way across this broad celestial landscape, spanning almost 7 degrees across planet Earth's night sky toward the constellation Canis Major.
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