What Is a Nebula? Nebulae are interstellar clouds of gas and dust. Many nebulae are formed from the remnants of dying stars. Nebulae are often also regions where new stars are born. These days, the term ‘nebula’ refers to an interstellar cloud of dust and gas. Nebulae are frequently formed from
A planetary nebula is a region of cosmic gas and dust formed from the cast-off outer layers of a dying star. Despite their name, planetary nebulae have nothing to do with planets. Credit: ESA/Hubble 15 Hubble images
showing the central part of the Orion Nebula complex. Hubble’s high resolution has been crucial in the investigation of the dust discs, dubbed proplyds, around the newborn stars in this nebula. The ‘proplyds’ may very well be young planetary systems in the early phases of their creation. The details that Hubble revealed are better than what has been achieved with ground-based instruments, and thanks to Hubble we have visual proof that dusty discs around young stars are common.
Hubble’s Wide Field Camera 3 instrument is designed to make detailed images in both visible and infrared light, and offers greatly improved capabilities in the. This allows Hubble to peer through the dust and gas of nebulae and observe the newborn stars. Dust clouds scatter visible light, but let infrared light through unimpeded, meaning infrared observations are often the only way to clearly see the full extent of the star formation in the region.
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