English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The reason for the horizontal turn of the Tunguska-1908 bolide trajectoryremains difficult to understand. It finds explanation, however, in the NewExplosive Cosmogony of minor bodies as having been caused by an explosion of apart (M up to 10^12 g) of the comet nucleus whose ices contained products ofits electrolysis, 2H2+O2. In detonation, this part was repelled from the moremassive unexploded nucleus remnant, changed the direction of its own motion by~10^o and imparted its kinetic energy, in expanding and slowing down, to theair in producing an effect of a high-altitude explosion. Because there are notraces of a fall of the more massive remnant, one comes to the conclusion thaton passing through the Earth's atmosphere it again entered a heliocentric orbit(the hypothesis of V.Vernadskiy, 1932). A search for this comet,P/Tunguska-1908, among the 6077 known NEAs shows the 2005NB56 object to be themost appropriate candidate for a number of its parameters (a size is ~ 170 m, P= 2.106 y, e = 0.473 and i = 6.8^o). Back integration of its orbit made withoutallowing for non-gravitational effects suggests that it had passed the Earth onJune 27, 1908 at a distance of 0.06945 AU. It is quite possible that a properinclusion of even fairly weak non-gravitational forces would make its orbit fitin parameters that of the Tunguska bolide.

A search for a present-day candidate for the Comet P/Tunguska-1908