Is Number the Stars a nonfiction book?
Number the Stars. Number the Stars (1989) is a work of historical fiction by American author Lois Lowry, about the escape of a Jewish family (the Rosens) from Copenhagen, Denmark during World War II. The story centers on ten-year-old Annemarie Johansen, who lives with her family in Copenhagen in 1943.
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.
- There are about 10 billion galaxies in the observable universe! The number of stars in a galaxy varies, but assuming an average of 100 billion stars per galaxy means that there are about 1,000,000,000,000,000,000,000 (that's 1 billion trillion) stars in the observable universe!
- But more likely, there are 5 to 10 times more stars than there are grains of sand on all the world's beaches. So, there's your answer, Sheldon. For some “back of the napkin” math we can guess that there are more stars in our Universe than there are grains of sand on all the beaches of Earth.
- Apparently there are 6.023 x 10^23 SiO2 units per gram, so there would be 6.023 x 10^23 / 60 ≈ 1 x 10^22 SiO2 units in a gram of pure SiO2, and with SiO2 composed of 3 atoms, that puts us at 3 x 10^22 atoms per gram of SiO2. However, a single grain of sand does not weigh a gram.
100 thousand million stars
- 13.8 billion years
- 50 stars
- Milky Way Galaxy Has Four Spiral Arms, New Study Confirms. A 12-year study published in the Monthly Notices of the Royal Astronomical Society has confirmed that our Milky Way Galaxy has four spiral arms, following years of debate that it has only two arms.
All in all, Hubble reveals an estimated 100 billion galaxies in the universe or so, but this number is likely to increase to about 200 billion as telescope technology in space improves, Livio told Space.com.
- Our universe may be one of many, physicists say. The universe we live in may not be the only one out there. In fact, our universe could be just one of an infinite number of universes making up a "multiverse." Though the concept may stretch credulity, there's good physics behind it.
- If inflation occurred at a constant rate through the life of the universe, that same spot is 46 billion light-years away today, making the diameter of the observable universe a sphere around 92 billion light-years. [
- 50 stars
Updated: 2nd November 2019