Best Cassiopeia
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Cassiopeia A is a supernova remnant expanding within the constellation Cassiopeia. It represents the spectacular death of a massive star that occurred around the late 17th century. The nebula emits intense radio waves and X-rays, making it a valuable object for astronomers studying stellar evolution...
The IC 1805 and IC 1848 complex is a massive star-forming region located in the constellation Cassiopeia, within the Perseus arm of the Milky Way galaxy. The two neighboring emission nebulas are commonly referred to as the Heart Nebula (IC 1805) and the Soul Nebula (IC 1848). These nebulas are compo...
The Bubble Nebula, formally NGC 7635, is an emission nebula located within the Cassiopeia constellation. It's notable for its distinctive bubble-like structure created by the energetic output of the star BD+60 2522. Discovered by William Herschel in 1787, it’s a region of ionized hydrogen gas (HII)...
The Heart Nebula, formally IC 1805 or Sh2-190, is an emission nebula located within the constellation Cassiopeia. It’s notable for its distinctive heart-like shape and intense red glow produced by ionized hydrogen gas (HII) originating from the Melotte 15 star cluster. Astronomers and those studying...
The Soul Nebula, formally IC 1848 or W5, is an emission nebula within the Cassiopeia region. It’s notable for its vibrant colors produced by ionized hydrogen gas from a young star cluster. Astronomers and those studying stellar nurseries find it particularly interesting due to its complex structure...
IC 1805, commonly known as the Heart Nebula, is a large emission nebula located in the constellation Cassiopeia. The nebula's distinctive shape and red glow are generated by ionized hydrogen gas illuminated by the radiation of the young open star cluster Melotte 15 at its center. Positioned roughly...
Sharpless 2-190 is the emission nebula commonly called the Heart Nebula, located in the constellation Cassiopeia within the Milky Way. It is a large H II region in which ultraviolet radiation from young, massive stars ionizes surrounding hydrogen gas, producing the nebula's reddish glow in astronomi...
The Ghost of Saturn Nebula, designated NGC 7009, is a planetary nebula located in the constellation of Aquarius. English astronomer William Herschel discovered it in 1782, observing its distinct, roughly Saturn-like shape. The nebula is noted for its ansae, which are extensions of nebulosity flankin...
IC 1848, commonly known as the Soul Nebula, is an emission nebula in the constellation Cassiopeia, approximately 7,500 light-years from Earth. The nebula spans about 150 light-years and consists of ionized hydrogen gas excited by radiation from embedded young stars. IC 1848 is often studied alongsid...
Tycho’s Supernova Remnant represents the expanding cloud of gas and dust created by the explosion of a star approximately 500 years ago. Observed by Tycho Brahe, this remnant – officially designated SNR G347.3–0.2 – is notable for its prominent X-ray emission. Astronomers study it to understand supe...
Sharpless 2-199, also catalogued as Westerhout 5 (W5) and popularly known as the Soul Nebula, is an emission nebula and H II region in the constellation Cassiopeia, approximately 7,500 light-years from Earth. It is an active star-forming region within the Perseus Arm of the Milky Way and contains th...
NGC 7635, designated as the Bubble Nebula, is an emission nebula situated in the constellation Cassiopeia. The structure consists of a spherical shell of gas created by the stellar wind of the massive central star, SAO 20575. The star's radiation ionizes the surrounding gas, causing it to glow. The...
Sharpless 2-184 is the NGC 281 star-forming region in Cassiopeia, notable for containing open cluster IC 1590 and several compact Bok globules.
Westerhout 5 is a large H II star-forming region in the Cassiopeia constellation, notable for its distinct, hollowed-out cavities sculpted by intense stellar winds.
The Pacman Nebula, formally NGC 281, is an emission nebula within the Cassiopeia constellation. It’s notable for its distinctive shape resembling a grinning face, created by ionized hydrogen gas. This region contains the IC 1590 star cluster and Bok globules, offering astronomers insights into stell...
The W3 Nebula is a prolific star-forming region in the outer Milky Way, situated in the Perseus arm of the Cassiopeia constellation and studied extensively.
Sharpless 2-157 is an emission nebula located within the Cassiopeia constellation. Identified by astronomer Stewart Sharpless as part of his 1959 survey of star-forming regions, it’s notable for its strong hydrogen-alpha (HII) emission lines. These lines reveal intense star formation activity within...
The Lobster Claw Nebula, formally Sh2-157, is an emission nebula located within the Cassiopeia constellation. It’s notable for its distinctive claw-like structure formed by intense star formation activity. This region, associated with the Cas OB2 association of massive stars and situated in the Pers...
Sh2-157, also known as the Lobster Claw Nebula, is an emission nebula located within the Cassiopeia OB2 association. This region of star formation exhibits a distinctive “lobster claw” morphology shaped by the intense ultraviolet radiation from massive, hot stars. It’s a significant example of how s...
The Bubble Nebula, formally NGC 7635, is an emission nebula located in the constellation Cassiopeia. It’s notable for its dramatic appearance created by the intense stellar wind of a massive blue star, BD+60°2522. This wind sculpted a cavity, or bubble, within the interstellar medium. Astronomers an...
Rho Cassiopeiae is a yellow hypergiant star situated in the northern constellation of Cassiopeia. It is recognized as one of the most massive and luminous stars in the Milky Way, with an estimated radius that places it among the largest known stars. The star exhibits complex, long-term variability a...
The Dolphin Nebula is an ancient, heavily evolved planetary nebula in Cassiopeia, notable for its asymmetric arc shape and cataloging by Stewart Sharpless.
Abell 85, also cataloged as CTB 1, is a faint supernova remnant in the Cassiopeia constellation, notable for its distinct, nearly perfectly circular optical structure.
Tycho's Supernova Remnant is the expanding debris from SN 1572, a stellar explosion observed in the constellation Cassiopeia and carefully documented by Tycho Brahe. Modern observations identify it as the remnant of a Type Ia supernova, produced by the thermonuclear disruption of a white dwarf. Its...
Schedar, designated Alpha Cassiopeiae, is an orange K-type giant in the constellation Cassiopeia, roughly 230 light-years from Earth. It forms part of the constellation's familiar W-shaped pattern and has an apparent magnitude close to 2.2. Although its Alpha designation suggests primacy, it is very...
The Heart Nebula, cataloged as IC 1805, is a large emission nebula located in the constellation Cassiopeia. Its recognizable heart-shaped appearance is formed by ionized hydrogen gas illuminated by radiation from young, massive stars. The central open cluster, Melotte 15, contains several stars that...
The Soul Nebula (IC 1848) is a large emission nebula and active star-forming region located in the constellation Cassiopeia. It is often observed and imaged alongside the neighboring Heart Nebula (IC 1805), with the pair collectively spanning roughly 300 light-years. The nebula's hydrogen gas is ion...
IC 63, unofficially nicknamed the Ghost of Cassiopeia, is an emission and reflection nebula located roughly 550 light-years away in the constellation Cassiopeia. The structure is physically shaped and illuminated by the high-energy radiation emitted by the nearby massive star Gamma Cassiopeiae. It p...
Caph, officially designated as Beta Cassiopeiae, is a yellow-white giant star located approximately 54 light-years from Earth in the constellation Cassiopeia. It is one of the five vertices forming the distinctive 'W' asterism associated with the constellation, making it easily identifiable in the n...
