how does it's surroundings look like?
The nebula is a prominent naked eye object in the southern skies showing a complex mix of emission, reflection, and dark nebulosity
Eta Carinae
Eta Carinae is found within the Carina Nebula, a giant star-forming region in the Carina–Sagittarius Arm of the Milky Way. The nebula is a prominent naked eye object in the southern skies showing a complex mix of emission, reflection, and dark nebulosity. Eta Carinae is known to be at the same distance as the Carina Nebula and its spectrum can be seen reflected off various star clouds in the nebula. The appearance of the Carina Nebula, and particularly of the Keyhole region, has changed significantly since it was described by John Herschel over years ago. This is thought to be due to the reduction in ionising radiation from Eta Carinae since the Great Eruption. Prior to the Great Eruption the Eta Carinae system contributed up to 20% of the total ionizing flux for the whole Carina Nebula, but that is now mostly blocked by the surrounding gas and dust.
where could be found hii emission nebula regions Sometimes several hundred light-years across, are often associated with giant molecular clouds what does this region mean? It is a region of interstellar atomic hydrogen that is ionized how did it get the name? The term H II is pronounced "H two" by astronomers. "H" is the chemical symbol for hydrogen, and "II" is the Roman numeral for 2. what are it's features? It vary greatly in their physical properties, their size is also known as the Stromgren radius and essentially depends on the intensity of the source of ionising photons and the density of the region, their densities range from over a million particles per cm³ in the ultra-compact H II regions to only a few particles per cm³ in the largest and most extended regions how is it distributed? The reason H II regions rarely appear in elliptical galaxies is that ellipticals are believed to form through galaxy mergers. In galaxy clusters, such mergers are frequent. does it face any problems? UNANSWERABLE which are the special regions it has? Orion Nebula, the Eta Carinae Nebula, and the Berkeley 59 / Cepheus OB4 Complex what is the second one about? It is also known as the Grand Nebula in Carina,  is a large complex area of bright and dark nebulosity in the constellation Carina who discovered it? Nicolas-Louis de Lacaille how is it classified? Eta Carinae A is classified as a luminous blue variable (LBV) due to the distinctive spectral and brightness variations. how big is it? The size of the two main stars in the Eta Carinae system is difficult to determine precisely because neither star can be seen directly has it witnessed any eruption? Yes, two eruptions have been observed from Eta Carinae
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Eta Carinae [SEP] Surroundings
Eta Carinae is found within the Carina Nebula, a giant star-forming region in the Carina–Sagittarius Arm of the Milky Way. The nebula is a prominent naked eye object in the southern skies showing a complex mix of emission, reflection, and dark nebulosity. Eta Carinae is known to be at the same distance as the Carina Nebula and its spectrum can be seen reflected off various star clouds in the nebula. The appearance of the Carina Nebula, and particularly of the Keyhole region, has changed significantly since it was described by John Herschel over years ago. This is thought to be due to the reduction in ionising radiation from Eta Carinae since the Great Eruption.