Naddition to comets, water for earth's early oceans might have come from a. cyanobacteria. b. volcanic eruptions. c. rain. d. rivers.

One of the brightest comets of the 20th century was comet hyakutake, which passed close to the sun in early 1996. the orbital period of this comet is estimated to be about 30,000 years. find the semi-major axis of this comet’s orbit. compare it to the average sun-pluto distance and to the distance to alpha centauri, the nearest star to the sun, which is 4.3 light-years distant.

Russia is to the east if germany ? true or false

The pacific islands that lie along tectonic plates may have volcanic activity are uninhabited may not have agricultural economies are located in the tasman sea