sungrazing comets

sungrazing comets

(sun -grayz-ing) Comets whose perihelion points are very close to the Sun's surface. They actually pass through the solar corona. Comet 1882 II, for example, passed within 1.2 solar radii of the Sun's center. Sungrazing comets tend to be exceptionally bright. 1843 I, for example, was seen in broad daylight when it was only 4° from the Sun in the sky. Quite often, sungrazers are torn apart by tidal forces.
References in periodicals archive ?
The fateful comet would have whipped around the fiery ball "if it had survived its journey" but it was "torn apart and vaporized by the intense forces near the Sun" - a common fate for most sungrazing comets.
Ikeya-Seki belonged to the Kreutz family of sungrazing comets.
Sungrazing comets often shed large fragments or even completely disrupt following close encounters with the sun, but for ISON neither fate is a forgone conclusion.
The Kreutz-group comets are a family of sungrazing comets, characterized by orbits taking them extremely close to the Sun at perihelion.
We have here an exceptionally rare opportunity to observe the complete vaporization of a relatively large comet, and we have approximately 18 instruments on five different satellites that are trying to do just that," the Daily Mail quoted Naval Research Laboratory scientist Karl Battams as writing on the Sungrazing Comets website.
He will be remembered for recognising the group of sungrazing comets that bear his name.
Other articles survey the current state of research in topics that include astrobiology, sungrazing comets, digital image reconstruction, new spectral types L and T, high-velocity white dwarfs and galactic structure, standard photometric systems, mega-masers and galaxies, and galactic winds.
Another key goal would be modernizing the satellite's coronagraph, which photographs the sun's outer fringes and recently discovered at least two sungrazing comets (SN: 7/16/88, p.
The shower results when Earth passes through the debris fields left by two sungrazing comets, Marsden and Kracht, that broke apart in space.
In 2011, we saw two sungrazing comets in this satellite's field of view, including the spectacular C/2011 W3 (Lovejoy), so I thought our chances of seeing some-thing this time were good.
SUNGRAZING COMETS: Sungrazing comets are a special class of comets that come very close to the sun at their nearest approach, a point called perihelion.
The majority were sungrazing comets of the Kreutz group and these did not survive perihelion.