Collision of an interstellar cloud with the solar system

Details Collision of an interstellar cloud with the solar system Collision of an interstellar cloud with the solar system

Aug 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977rech....8..616v&link_type=abstract

La Recherche, vol. 8, July-Aug. 1977, p. 616-622. In French.

Astronomy and Astrophysics

Astronomy

2

Hydrogen Clouds, Interstellar Gas, Nebulae, Solar System, Climatology, Comets, Deuterium, Interstellar Matter, Oao 3, Solar Physics, Spaceborne Astronomy

Scientific paper

Observations of hydrogen and deuterium abundances made by the satellite Copernicus suggest the possible presence of an interstellar cloud at a distance of about 0.1 parsec from the solar system. It is estimated that this cloud has a density of about 1000 atoms per cubic centimeter and a thickness of 0.05 parsec. An encounter with the solar system could occur in about 5000 years. The impact of such an encounter on the earth's climate is considered. Modifications of the outer layers of the sun, changes in the abundance of deuterium, and alterations in the composition of comets which might occur are discussed.

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