Search results
Results From The WOW.Com Content Network
Since the existence of toroidal planets is strictly hypothetical, no empirical basis for protoplanetary formation has been established. One homolog is a synestia, a loosely connected doughnut-shaped mass of vaporized rock, proposed by Simon J. Lock and Sarah T. Stewart-Mukhopadhyay to have been responsible for the isotopic similarity in composition, particularly the difference in volatiles, of ...
An artist's rendering of the Oort cloud and the Kuiper belt (inset). Tyche / ˈ t aɪ k i / was a hypothetical gas giant located in the Solar System's Oort cloud, first proposed in 1999 by astrophysicists John Matese, Patrick Whitman and Daniel Whitmire of the University of Louisiana at Lafayette.
The total mass of the interplanetary dust cloud is approximately 3.5 × 10 16 kg, or the mass of an asteroid of radius 15 km (with density of about 2.5 g/cm 3). [7] Straddling the zodiac along the ecliptic, this dust cloud is visible as the zodiacal light in a moonless and naturally dark sky and is best seen sunward during astronomical twilight.
Kordylewski began looking for a photometrically confirmable concentration of dust at the libration (Lagrangian) points in 1951. [5] [6] After a change in method suggested by Josef Witkowski, the clouds were first seen by Kordylewski in 1956. [7] Between 6 March and 6 April 1961, he succeeded in photographing two bright patches near the L 5 ...
The visible-light (left) and infrared (right) views of the Trifid Nebula—a giant star-forming cloud of gas and dust located 5,400 light-years away in the constellation Sagittarius Stars are thought to form inside giant clouds of cold molecular hydrogen — giant molecular clouds roughly 300,000 times the mass of the Sun ( M ☉ ) and 20 ...
Around the Earth Moon the Lunar Dust Experiment (LDEX) on the LADEE mission mapped the dust cloud from 20 to 100 km altitude and found ejecta speeds from 100 m/s to a few km/s; but only a tiny fraction of them escape the gravitation of the Moon. [130] Also other planets with satellites display a variety of dust ring phenomena.
A protoplanetary disk is a rotating circumstellar disc of dense gas and dust surrounding a young newly formed star, a T Tauri star, or Herbig Ae/Be star. The protoplanetary disk may not be considered an accretion disk ; while the two are similar, an accretion disk is hotter and spins much faster.
The Great Rift covers one third of the Milky Way, and is flanked by strips of numerous stars, such as the Cygnus Star Cloud. [2] West of the Cepheus Clouds, the Funnel cloud/Le Gentil 3 and the bordering North America Nebula, the Great Rift starts with the Northern Coalsack at the constellation of Cygnus, where it is known as the Cygnus Rift. [3]