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Skorašnje poruke
#1
Prirodne nauke / Odg: Šta je 3I/ATLAS, UFO ili ...
Poslednja poruka Kizza - danas u 06:43:33 POSLE PODNEDa se najezis i da li da mu poverujemo: https://www.youtube.com/watch?v=5JdkcQ0b0mk
#2
Prirodne nauke / Odg: Šta je 3I/ATLAS, UFO ili ...
Poslednja poruka ε Aurigae - danas u 05:52:56 POSLE PODNEA comet's anti-tail is an optical illusion that appears to point towards the Sun, opposite the comet's main dust tail. It consists of larger dust particles that remain within the comet's orbital plane and are seen as a spike from Earth's perspective when our planet crosses the comet's orbital plane. Unlike the main tail, which is pushed away from the Sun by solar radiation, the anti-tail is formed by the larger, heavier dust particles that lag behind the comet along its orbit. [1, 2, 3, 4]
How it forms
• Dust particles: Comets shed dust and gas as they approach the Sun. The dust particles are left behind in the comet's orbital path, creating a stream of debris.
• Perspective effect: The anti-tail is a line-of-sight effect. When Earth is in the right position relative to the comet, the stream of dust particles left behind appears to form a tail that points toward the Sun, according to EarthSky (https://earthsky.org/space/comet-a3-has-an-anti-tail-can-you-see-it/) and Wikipedia (https://en.wikipedia.org/wiki/Comet_tail).
• Larger particles: The larger, heavier dust particles are not as easily affected by solar radiation pressure and solar wind as the dust that forms the main tail.
• Location: The anti-tail appears to point from the comet's coma (its fuzzy atmosphere) toward the Sun. [1, 2, 3, 4, 5]
Key characteristics
• Opposite direction: It appears to point in the opposite direction of the comet's normal dust tail, which is always pushed away from the Sun.
• Temporary: An anti-tail is a temporary phenomenon that is only visible when Earth is in a particular position in its orbit relative to the comet.
• Reveals past path: The anti-tail shows the path the comet has already taken through space, as the dust particles are the material it has left behind. [1, 2, 3, 4]
AI responses may include mistakes.
[1] https://www.astronomy.com/picture-of-the-day/photo/tsuchinshan-atlas-anti-tail/
[2] https://earthsky.org/space/comet-a3-has-an-anti-tail-can-you-see-it/
[3] https://en.wikipedia.org/wiki/Comet_tail
[4] https://www.newsweek.com/comet-ztf-green-tail-antitail-towards-sun-1775755
[5] https://avi-loeb.medium.com/no-clear-cometary-tail-in-post-perihelion-images-of-3i-atlas-e3904b352a7a
How it forms
• Dust particles: Comets shed dust and gas as they approach the Sun. The dust particles are left behind in the comet's orbital path, creating a stream of debris.
• Perspective effect: The anti-tail is a line-of-sight effect. When Earth is in the right position relative to the comet, the stream of dust particles left behind appears to form a tail that points toward the Sun, according to EarthSky (https://earthsky.org/space/comet-a3-has-an-anti-tail-can-you-see-it/) and Wikipedia (https://en.wikipedia.org/wiki/Comet_tail).
• Larger particles: The larger, heavier dust particles are not as easily affected by solar radiation pressure and solar wind as the dust that forms the main tail.
• Location: The anti-tail appears to point from the comet's coma (its fuzzy atmosphere) toward the Sun. [1, 2, 3, 4, 5]
Key characteristics
• Opposite direction: It appears to point in the opposite direction of the comet's normal dust tail, which is always pushed away from the Sun.
• Temporary: An anti-tail is a temporary phenomenon that is only visible when Earth is in a particular position in its orbit relative to the comet.
• Reveals past path: The anti-tail shows the path the comet has already taken through space, as the dust particles are the material it has left behind. [1, 2, 3, 4]
AI responses may include mistakes.
[1] https://www.astronomy.com/picture-of-the-day/photo/tsuchinshan-atlas-anti-tail/
[2] https://earthsky.org/space/comet-a3-has-an-anti-tail-can-you-see-it/
[3] https://en.wikipedia.org/wiki/Comet_tail
[4] https://www.newsweek.com/comet-ztf-green-tail-antitail-towards-sun-1775755
[5] https://avi-loeb.medium.com/no-clear-cometary-tail-in-post-perihelion-images-of-3i-atlas-e3904b352a7a
#3
Oprema / Torba za teleskop
Poslednja poruka Drazen - danas u 12:56:04 POSLE PODNEZna li neko gde mogu da nabavim torbu za tubus Newton 203/1200 Flextube.
Kada se sklopi dužina tubusa iznosi oko 84 cm.
Kada se sklopi dužina tubusa iznosi oko 84 cm.
#4
Oprema / Odg: Binoviewer i zoom okulari...
Poslednja poruka Drazen - juče u 10:00:54 POSLE PODNEUvećanje im je 10x, što odgovara okularu od 25 mm.
#5
Oprema / Odg: Binoviewer i zoom okulari...
Poslednja poruka Drazen - juče u 09:49:06 POSLE PODNEOdlučio sam se za Lacerta premium flatfield okulare. Več sam nabavio parove od 15,5 i 10,5 mm. Nisam siguran za onaj od 25 mm pošto mi Super ploesel od 25 mm ima izraženo vinjetiranje, pa mi je faktički slabo upotrebljiv (gubim 1/4 vidnog polja okulara).Tu koristim dva okulara od stereomikroskopa, imaju vidno polje od 60 stepeni i eye relief od 22 mm. I vidi se celo vidno polje.
#6
Astrofotografija / Odg: Komete, asteroidi, meteor...
Poslednja poruka Polare - juče u 09:25:34 POSLE PODNEDa,to se zove ''International Astronomical Search Collaboration''
https://iasc.cosmosearch.org/
https://iasc.cosmosearch.org/
#7
Prirodne nauke / Odg: Šta je 3I/ATLAS, UFO ili ...
Poslednja poruka Kizza - juče u 08:26:09 POSLE PODNEHm, pojavi se prvi snimak i neobicno da jedan ''rep komete'' ide na suprotnu stranu nego gde bi trebalo da bude:
https://www.youtube.com/watch?v=ID_fbOjunpg
https://www.youtube.com/watch?v=708MsY8LrOc
https://www.youtube.com/watch?v=ID_fbOjunpg
https://www.youtube.com/watch?v=708MsY8LrOc
#8
AstroBerza / Odg: Prodajem komplet ZWO ASI5...
Poslednja poruka Djole - juče u 11:47:36 PRE PODNEMolim administratora da zakljuca temu.
#9
AstroBerza / Odg: Prodajem komplet ZWO ASI5...
Poslednja poruka Djole - Novembar 10, 2025, 10:25:43 POSLE PODNEkupljena 2022 god
#10
AstroBerza / Odg: Prodajem komplet ZWO ASI5...
Poslednja poruka Predrag - Novembar 10, 2025, 10:18:30 POSLE PODNEKoliko je stara kamera?