APOD.pl: astronomiczne zdjęcie dnia

Codziennie nowy obraz lub zdjęcie naszego fascynującego Wszechświata
wraz z krótkim objaśnieniem napisanym przez zawodowego astronoma.
Zobacz więcej!

4 sierpnia 2025

Blue Arcs Toward Andromeda
Źródło obrazu i prawa autorskie: Ogle et al.

Opis: What are these gigantic blue arcs near the Andromeda Galaxy (M31)? Discovered in 2022 by amateur astronomers, the faint arcs -- dubbed SDSO 1 -- span nearly the same angular size as M31 itself. At first, their origin was a mystery: are they actually near the Andromeda Galaxy, or alternatively near to our Sun? Now, over 550 hours of combined exposure and a collaboration between amateur and professional astronomers has revealed strong evidence for their true nature: SDSO 1 is not intergalactic, but a new class of planetary nebula within our galaxy. Dubbed a Ghost Planetary Nebula (GPN), SDSO 1 is the first recognized member of a new subclass of faded planetary nebulas, along with seven others also recently identified. Shown in blue are extremely faint oxygen emission from the shock waves, while the surrounding red is a hydrogen-emitting trail that indicates the GPN's age.

Jutro: complex stellar jumble

Autorzy i wydawcy: Robert Nemiroff (MTU) i Jerry Bonnell (UMCP)
NASA Official: Amber Straughn obowiązują określone prawa.
Polityka Privacy, Accessibility, Notices;
Serwis prowadzony przez: ASD w NASA / GSFC,
NASA Science Activation
oraz Michigan Tech. U.