Sir William Huggins obtained the first photographic spectrum of a comet (Comet 1881 III) on June 24, 1881, using a reflector telescope equipped for spectroscopy and astrophotography. Analysis of ...

I HAVE to thank Dr. Marshall Watts for having called attention to a point of some interest with regard to the spectra of comets, viz., which of the carbon spectra agrees with the cometary spectrum? In ...

For decades, comets have been at the center of a nitrogen mystery. The ratio of carbon-to-nitrogen within comets should be similar to that of the sun, because the sun and the rest of the solar system ...

Astronomers are rushing to study what appears to be the first known interstellar comet — and in some of the very earliest observations, it looks oddly familiar. The object, currently dubbed Comet ...

For the first time, astronomers have captured X-ray portraits of a comet from beyond our solar system, are providing a ...

OF ALL the memorable comets that have excited astronomers and stirred men’s imaginations, not one had more impact on our concepts of the universe than the Great Comet of 1577. Discovered in November ...