There are 10 times more stars in the night sky than grains of sand in the world’s deserts and beaches, scientists say. Astronomers have worked out that there are 70 thousand million million million – or seven followed by 22 zeros – stars visible from the Earth through telescopes.
That’s 70,000,000,000,000,000,000,000 stars versus 7,000,000,000,000,000,000,000 grains of sand!
The volume of sand was obtained by multiplying the length of the world’s beaches by their average width and depth. The number they calculated was seven quintillion five quadrillion (that’s 7.5 followed by seventeen zeros or 7.5 billion billion) sand grains !
25 mm across as a size between fine and medium sand . For volume, 100 x 100 x 100 grains of sand will equal 1 million (see the Squares and Cubes page for other cubes you should know!) – so . 25 mm = 0.0098425 inches.
Background radiation in the universe is considered a remnant of the Big Bang. The Universe is 13.77 billion years old.
Planetary scientist and stardust expert Dr Ashley King explains. ‘It is totally 100% true: nearly all the elements in the human body were made in a star and many have come through several supernovas. ‘
If you picture a cube that’s 1 foot wide in each direction, that holds about a billion grains of sand — which will weigh between 50 and 100 pounds, depending on how wet the sand is.
The Hubble Deep Field, an extremely long exposure of a relatively empty part of the sky, provided evidence that there are about 125 billion (1.25×1011) galaxies in the observable universe.
There are an estimated one hundred billion ( 100,000,000,000 ) stars in our own Milky Way galaxy, although some estimates range up to four times that many, much depending on the number of brown dwarfs and other very dim stars. A typical galaxy may contain anywhere between about ten million and one trillion stars.
The depth of sand in ergs varies widely around the world, ranging from only a few centimeters deep in the Selima Sand Sheet of Southern Egypt, to approximately 1 m (3.3 ft) in the Simpson Desert, and 21–43 m (69– 141 ft ) in the Sahara. This is far shallower than ergs in prehistoric times were.
They said, if you assume a grain of sand has an average size and you calculate how many grains are in a teaspoon and then multiply by all the beaches and deserts in the world, the Earth has roughly (and we’re speaking very roughly here) 7.5 x 1018 grains of sand , or seven quintillion, five hundred quadrillion grains.
0.000000000062 x 1 1,000,000,000,000 = 62 Therefore, 1 trillion grains of sand would have a volume of 62 meters cubed.
A handful of sand contains about 10,000 grains [sic; 100,000 rather], more than the number of stars we can see with the naked eye on a clear night.
In official UK statistics the term is now used to denote 1 thousand million – 1,000,000,000 . Historically, however, in the UK the term billion meant 1 million million – 1,000,000,000,000 – but in the United States the term was used to refer to 1 thousand million.
02X10^23 atoms it comes that we have 9.96X10^21 atoms in a grain . If you count 2 atoms per second, it will take 4.48X10^21 seconds to count or 1.42X10^14 years!!!