â Open Transport Incorporated's implementation action plan focused on a 3 year rolling plan to improve roads highways and bridges to be monitored on an annual basis. â Was this Helpful? YES NO 3 people found this helpful.
This is the missing-mass problem. If this factor of ten holds throughout the Universe, then the total mass in the Universe would be about 6e52 kg. If the missing mass were mostly in the form of hydrogen atoms (which is not at all clear) then the number of atoms would be about 4e79.
exists and is an alternate of . Hydrogen is the most common element in the universe as a whole; about 75% of the universe by mass is hydrogen (since hydrogen is also the lightest element, that means that the percentage by number of atoms is even higher) . Helium is second; oxygen is a fairly distant third.