As with most things in the heavens, many people can claim the title of the discoverer of nebulae. The first detailed observations, though, waited for famous scientist Christiaan Huygens in Huygens, by the way, also was the first to come up with a standard formula for centripetal force, which he published in So a big year for Huygens.
About 50 years later, Edmond Halley wrote about six different nebulae. For that, he got a comet named after him. Not really, he was a very accomplished scientist who served as the second Astronomer Royal in Britain. But, famous names flocked to nebulae over the years.
Edwin Hubble helped categorize nebulae based on the spectra of light they produce, also discovering that nearly all nebulae are associated with stars and are illuminated by starlight. Some nebulae are bright enough to be seen with the naked eye.
Many others are visible through telescopes, depending on how many stars are around them to illuminate the dust clouds that form the nebulae. Through advanced space telescopes like the Spitzer and Hubble Space Telescopes, we have plenty of gorgeous imagery of nebulae.
Most of these are formed through infrared and false-color images but they all are striking. These images depict the wide variety of nebulae available for scientists to study. All of them cover light years of distance in space. Some are wispy, some are well-defined.
For advice on photographing a nebula, read our guide to deep-sky astrophotography. Her first book about the history of robotic planetary landers is out now from The History Press. Home Science What is a nebula? Launch Gallery. Diffuse nebulae: These nebulae extend over a large area and have no defined edge.
Instead, they absorb the light of the stars behind them, creating dark patches on the sky. Supernova remnants: These are formed from the gas thrown off by a supernova. The energy of the explosion strongly ionises the cloud, making it glow brightly. Planetary nebulae: When a star enters its red giant phase, the outer layers of gas blow off into interstellar space, creating a bubble of gas. When the central star loses enough gas from its outer layers, its starts glowing brightly, illuminating the bubble.
Rector NRAO. Buried in the Eagle Nebula is a region of intense star formation. Narrowband filters There are many elements that glow within a nebulae, and each of these elements might have several spectral lines. An image of the Swan nebula taken by the Hubble Space Telescope.
The top four images are taken through specific filters, which are then combined to create the bottom photographs. Using different filters creates a very different view of the nebula.
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