Stunning new images captured by the 8.1-meter Gemini North telescope on Mauna Kea, Hawaii, showcase the Crystal Ball Nebula in remarkable detail. This glowing, lumpy mass of gas is intricately shaped by a pair of stars.
This captivating image of the Crystal Ball Nebula was taken by the International Gemini Observatory’s 8.1 m Gemini North Telescope. Image credit: J. Miller & M. Rodriguez, International Gemini Observatory & NSF’s NOIRLab / TA Rector, University of Alaska Anchorage & NSF’s NOIRLab / D. de Martin & M. Zamani, NSF’s NOIRLab.
The Crystal Ball Nebula, located approximately 1,500 light-years away in the constellation Taurus—near the border of Perseus—is officially designated as NGC 1514.
Discovered on November 13, 1790, by the renowned German-British astronomer William Herschel, this nebula is a breathtaking example of celestial beauty.
Utilizing the Gemini Multi-Object Spectrograph (GMOS), the latest images of the Crystal Ball Nebula were captured by the Gemini North Telescope, part of the International Gemini Observatory funded by the NSF and operated by NSF’s NOIRLab.
NOIRLab astronomers classify the Crystal Ball Nebula as a planetary nebula, a term first introduced by Herschel himself. He recognized the spherical shape of these objects in the 1700s, coining the term due to their resemblance to planets—despite the fact that they are entirely unrelated.
Planetary nebulae are formed when a low- or intermediate-mass star expels its outer layers towards the end of its life, creating a spherical gas cloud.
Unlike many planetary nebulae, which typically have smoother shapes, the Crystal Ball Nebula is characterized by its uniquely bumpy gas shells.
As the central star releases this gas, its inner core becomes exposed, with radiation from the core energizing the gas to scorching temperatures, resulting in a colorful glow. For instance, the Crystal Ball Nebula’s temperature is estimated to be around 15,000 K.
Herschel was captivated by the nebula’s dimly lit shell; before his discovery, he believed nebulae to be merely distant collections of stars.
The bright spot at the center of the gaseous shell contradicted this theory. Herschel noted, in 1791: ‘Our judgment, we may venture to say, and it will be, is that the nebula around this star is not of a stellar nature.’
He theorized that the light emanating from the Crystal Ball Nebula originated from a single star, rather than a group of distant stars.
Although the new images may depict a singular bright source at the center—similar to Herschel’s observations—the Crystal Ball Nebula actually harbors two stars.
These two stars form a binary pair that orbits each other with a period of approximately nine years, marking it as the longest known binary star pair within a planetary nebula, according to the astronomers.
Source: www.sci.news
