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physical object > natural object > celestial body > nebula > reflection nebula |
reflection nebula comparison table |
Subject | is a kind of | is an instance of | has synonym | has discovery date | has image | has definition | has discoverer |
---|---|---|---|---|---|---|---|
cometary nebula | reflection nebula | A reflection nebula with a fan shape that bears a superficial resemblance to a comet. Classical examples of the heads of cometary nebulae are R Mon, R CrA, and RY Tau. All have A0-G0 type spectra that resemble the spectrum of a T Tauri star, and their brightness varies from year to year. | |||||
Hind's nebula | reflection nebula | NGC 1554, NGC 1555 | 1852 | A reflection nebula illuminated by the star T Tauri. It is remarkable for its changes in brightness. | Hind | ||
NGC 1999 | reflection nebula |
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