The Hubble Space Telescope has captured a stunning image of a star-forming complex in the constellation Cassiopeia, which has been unveiled as the ‘image of the week’. The image showcases a section of the star-forming region known as IC 63, also referred to as the Ghost Nebula. This nebula is located about 550 light-years away from Earth.
This particular image of the Ghost Nebula was taken using Hubble’s Wide Field Camera 3 (WFC3), a highly advanced and versatile camera that has contributed significantly to our understanding of the universe since it was installed in 2009. The WFC3 is capable of observing light in a wide range of wavelengths, which includes ultraviolet light, visible light, and near-infrared light. This allows astronomers to gain a broader perspective of the universe by studying it under different types of light.
The IC 63 Nebula is known to be a particularly active star-forming region. It is exposed to intense ultraviolet radiation from a nearby, highly luminous star named Gamma Cassiopeiae, which is about 19 times more massive and 65,000 times brighter than our Sun. The radiation from this star is causing the hydrogen gas in IC 63 to glow with a red hue, while the dust particles in the nebula scatter the star’s bluish light.
Gamma Cassiopeiae is a variable star, meaning its brightness changes over time due to the star’s rapid rotation. It’s spinning so quickly that it’s throwing off a disk of material, leading to its variability. Despite being hundreds of light-years away, Gamma Cassiopeiae is one of the brightest stars in the night sky and can be seen from Earth with the naked eye.
The Hubble Space Telescope, a joint project of NASA and the European Space Agency (ESA), has been instrumental in studying distant galaxies, nebulae, and stars, providing astronomers with invaluable data and breathtaking images since its launch in 1990. Its observations have led to breakthroughs in astrophysics, such as determining the rate of expansion of the universe.
Despite its age, Hubble continues to provide valuable observations and images. Its functionality is expected to overlap with the upcoming James Webb Space Telescope (JWST), set to launch in 2021, which will further expand our knowledge of the cosmos by observing the universe in the infrared spectrum. The Hubble and JWST together will offer an unrivaled view of the universe and continue to contribute to our understanding of the cosmos.
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