a colorful cloud of gas that glows because it is heated by light from nearby hot stars
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An ionization nebula is a type of interstellar cloud containing ionized gases, typically hydrogen. These nebulae are often illuminated by young, hot stars, causing the gas to emit vibrant colors. The ionization is due to the high-energy ultraviolet radiation from the nearby stars stripping electrons from the gas atoms.
A hot nebula is a cloud of gas and dust in space that emits strong radiation, usually in the form of ultraviolet or X-ray wavelengths. These nebulae are often associated with regions of active star formation or with the remnants of massive stellar explosions, such as supernovae. The high temperatures in hot nebulae lead to the ionization of the gas within them, causing them to glow brightly.
The Helix Nebula is a planetary nebula located in the constellation Aquarius, while the Ring Nebula is a planetary nebula located in the constellation Lyra. The Helix Nebula appears more like a disk or helix shape, while the Ring Nebula appears as a ring or donut shape due to its orientation.
protostar or nebula
The nebula you are referring to is likely the Swan Nebula, also known as the Omega Nebula. It is a famous emission nebula located in the constellation Sagittarius. The name "Swan Nebula" comes from its resemblance to a swan when viewed in certain images.
A nebula is a vast cloud of gas and dust in space. A solar nebula specifically refers to the cloud of gas and dust from which our solar system formed around 4.6 billion years ago.