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Trees felled by the 1908 Tunguska event. The 1908 Tunguska event—an enormous explosion in a remote region of Siberia—has appeared in many works of fiction. It is generally held to have been caused by a meteor air burst, though several alternative explanations have been proposed both in scientific circles and in fiction.
Outside of literature, impact events—both by comets and other objects such as asteroids—appeared only infrequently for most of the 1900s; the impact of Comet Shoemaker–Levy 9 on Jupiter in 1994 was followed by a sharp increase in depictions of such events across film, television, and video games.
Antimatter comets and antimatter meteoroids are hypothetical comets and meteoroids composed solely of antimatter instead of ordinary matter.Although never actually observed, and unlikely to exist anywhere within the Milky Way, they have been hypothesized to exist, and their existence, on the presumption that hypothesis is correct, has been put forward as one possible explanation for various ...
Periodic comets usually have elongated elliptical orbits, and usually return to the vicinity of the Sun after a number of decades. The official names of non-periodic comets begin with a "C"; the names of periodic comets begin with "P" or a number followed by "P". Comets that have been lost or disappeared have names with a "D". Comets whose ...
The link between comets and meteor showers was dramatically underscored when in 1872, a major meteor shower occurred from the orbit of Comet Biela, which had been observed to split into two pieces during its 1846 apparition, and was never seen again after 1852. [52]
An impact event is a collision between astronomical objects causing measurable effects. [1] Impact events have been found to regularly occur in planetary systems, though the most frequent involve asteroids, comets or meteoroids and have minimal effect.
While the event is generally held to have been caused by a meteor air burst, several alternative explanations have been proposed both in scientific circles and in fiction. [3] [4] [5] A popular one in fiction is that it was caused by an alien spaceship, possibly first put forth in Ed Earl Repp's 1930 short story "The Second Missile".
An artist's concept of a planetary system. A planetary system is a set of gravitationally bound non-stellar bodies in or out of orbit around a star or star system.Generally speaking, systems with one or more planets constitute a planetary system, although such systems may also consist of bodies such as dwarf planets, asteroids, natural satellites, meteoroids, comets, planetesimals [1] [2] and ...