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Keywords: comet, dust, planetary nebula, planetary system
![Возникновение пылевого хвоста кометы Чурюмова-Герасименко](https://images.astronet.ru/pubd/2020/07/13/0001677451/Comet67P_Rosetta_960.preview.jpg)
12.07.2020
Where do comet tails come from? There are no obvious places on the nuclei of comets from which the jets that create comet tails emanate. One of the best images of emerging jets...
![Комета NEOWISE над Стоунхенджем](https://images.astronet.ru/pubd/2020/07/14/0001677700/NeowiseStonehenge_Deval_960.preview.jpg)
14.07.2020
Have you ever seen a comet? Tonight -- and likely the next few nights -- should be a good chance. Go outside just at sunset and look to your northwest. The lower your horizon, the better. Binoculars may help, but if your sky is cloudless and dark, all you should need is your unaided eyes and patience.
![Хвосты кометы NEOWISE](https://images.astronet.ru/pubd/2020/07/14/0001677774/C2020_F3_NEOWISE_2020_07_10_druckmuller1024.preview.jpg)
11.07.2020
Comet NEOWISE (C/2020 F3) is now sweeping through northern skies. Its developing tails stretch some six degrees across this telescopic field of view, recorded from Brno, Czech Republic before daybreak on July 10. Pushed out by the pressure of sunlight itself, the comet's broad, yellowish dust tail is easiest to see.
![Комета NEOWISE над Швейцарскими Альпами](https://images.astronet.ru/pubd/2020/07/15/0001678018/NeowiseAlps_salzgeber_960.preview.jpg)
15.07.2020
Comet NEOWISE has been wowing photographers around much of the world during dawn and dusk, at the margins of day and night. For the most northern residents of planet Earth, however, the comet circles the North Star and never sets.
![Длинные хвосты кометы NEOWISE](https://images.astronet.ru/pubd/2020/07/16/0001678327/2020_07_14_NEOWISE_Suchy_Vrch_1263px.preview.jpg)
16.07.2020
This Comet NEOWISE (C/2020 F3) now sweeps through our fair planet's northern skies. Its long tails stretch across this deep skyview from Suchy Vrch, Czech Republic. Recorded on the night of July 13/14...
![M2-9: крылья туманности Бабочка](https://images.astronet.ru/pubd/2020/09/13/0001694579/M2D9_HubbleSchmidt_985.preview.jpg)
13.09.2020
Are stars better appreciated for their art after they die? Actually, stars usually create their most artistic displays as they die. In the case of low-mass stars like our Sun and M2-9 pictured here, the stars transform themselves from normal stars to white dwarfs by casting off their outer gaseous envelopes.
![Гало вокруг Кошачьего Глаза](https://images.astronet.ru/pubd/2020/06/08/0001665482/catseye2_not_960.preview.jpg)
7.06.2020
The Cat's Eye Nebula (NGC 6543) is one of the best known planetary nebulae in the sky. Its haunting symmetries are seen in the very central region of this stunning false-color picture, processed...
![Планетарная туманность Эйбелл 78](https://images.astronet.ru/pubd/2020/10/16/0001702081/PN_Abell78-1_1024c1.preview.jpg)
16.10.2020
Planetary nebula Abell 78 stands out in this colorful telescopic skyscape. In fact the colors of the spiky Milky Way stars depend on their surface temperatures, both cooler (yellowish) and hotter (bluish) than the Sun.
![Удивительная спираль в LL Пегаса](https://images.astronet.ru/pubd/2021/11/29/0001789342/LLPegasi_HubbleLodge_960.preview.jpg)
29.11.2021
What created the strange spiral structure on the upper left? No one is sure, although it is likely related to a star in a binary star system entering the planetary nebula phase, when its outer atmosphere is ejected.
![NGC 2392: планетарная туманность с двойной оболочкой](https://images.astronet.ru/pubd/2020/02/16/0001613528/NGC2392_HubbleSchmidt_960.preview.jpg)
16.02.2020
To some, this huge nebula resembles a person's head surrounded by a parka hood. In 1787, astronomer William Herschel discovered this unusual planetary nebula: NGC 2392. More recently, the Hubble Space Telescope imaged the nebula in visible light, while the nebula was also imaged in X-rays by the Chandra X-ray Observatory.
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