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John Bevis, an English physicist and amateur astronomer observed the strings of gas and light fragmentation within certain star clusters.
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Discovery Channel Discovered by Philippe Loys de Cheseaux in 1745-6.
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Charles Messier captured and cataloged the first nebula. It was located within Vulpecula(M27).
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Documented the first nebula sighting through a telescope. "A faint, but perfectly outlined planet. And it is as large as Jupiter, but it resembles a fading planet." This was later classified as the Ring Nebula
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William Herschel coined the name 'planetary nebulae' for certain nebulae that held a resemblence to Uranus.
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Herschel discovered a planetary nebulae that was physically associated with a bright central star.
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Friedrich Bessel guessed that there might be a nebula around the star, Sirius. His predictions were based off of the spectroscope.
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Alvan Clark discovers Sirius B star which was thousands of times fainter than the Sirius A.
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Huggins uses a spectroscopy to identify nebulae within constellations. The constellation Draco was where he found different gas compositions in nebulae, based on the color of gases.
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Telescopes progressed to the point where viewing spacial objects outside of our atmosphere became easily done. More and more photographs were being taken of these unexplored gas pockets, dust clouds, and star clusters. This range of photography led to the discoveries of many other nebulas, such as the Crab, Horsehead, Dragon, Ring, and Lagoon Nebulae.
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Astronomers Henry Norris Russell and Edward Pickering, recorded the first spectrum of the white dwarf star, Omicron Eridani B.
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Boris Voronstov-Velyaminor classified planetary nebulae into 6 different classes based on their shape.
1. Stellar Image.
2. Smooth Disk
3. Irregular Disk
4. Ring Structure.
5. Irregular Form
6. Anomalous Form -
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NASA's Infra Red Astronomical Satelite (IRAS) identifies planetary nebulae as a major source of complex interstellar matter.
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Astronomers release pictures of different nebulae, including the Cat's Eye Nebula. These pictures revealed details about the morphology of planetary nebulae.
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Astronomers announce that most nebulae form in binary star systems.
