The first elements to form at the beginning of the universe were 92% hydrogen and 8% helium, with the exception of a very small amount of lithium. The remaining elements were formed by stellar nucleosynthesis. That is, by the fusion of the stellar core, or by the heat of an explosion at the star’s death….
Water vapor around Jupiter’s moon Ganymede. This amazing phenomenon was discovered by the Hubble Telescope. Ganymede is the largest moon in the Solar System. The Hubble Space Telescope has found evidence of water vapor in the atmosphere around Jupiter’s moon Ganymede. It has been found that vapor is formed as the ice sheets change from…
