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Did you know? The universe holds more stars than grains of sand on Earth
Scientists estimate that there are considerably more stars in the cosmos than there are grains of sand on Earth, which is mind-blowing.
Photo Credit: AlexTIZANO/Getty Images
The next time you’re strolling along a sandy beach, stop and admire the countless grains of sand underfoot. Now consider an even larger number: stars dispersed throughout the cosmos. Scientists estimate that there are considerably more stars in the cosmos than there are grains of sand on Earth, which is a mind-blowing idea.
Adding Up the Uncountable
An almost inconceivable quantity of sand grains can be found on Earth’s beaches and deserts. About 10,000 grains are found in a single handful of sand; multiplying that number by the total number of beaches and deserts yields an approximate value of 7.5 x 10¹⁸ grains of sand. Eighteen zeros after a seven!
Even still, the stars are more numerous than this astronomical number. Astronomers calculate that there are around 1 x 10²⁴ stars—a one followed by 24 zeros—in the observable universe. This includes stars in over 100 billion galaxies, each with billions or even trillions of stars.
How Do We Know?
Making reasonable guesses is the goal of this comparison, not actually counting every grain or star. Scientists investigate small portions of the universe and extrapolate their findings using observatories like the Hubble and the James Webb Space Telescope. In a similar vein, they determine the density and distribution of sand on Earth using sophisticated models.
Beyond the Data
This comparison’s enormity inspires amazement and awe. It serves as a reminder of our position in the universe, as one planet orbits a single star among many others. Recognising the universe’s amazing immensity and possibility for discovery is more important than simply feeling small.
What’s Outside?
The possibilities are unlimited because there are so many stars. Like our Sun, many stars have planetary systems. Is life possible on one of these far-off planets? Will we ever make it to another star? Humanity continues to aim for the stars, both literally and figuratively, because of questions like these.
A View from the Cosmos
Consider this the next time you gaze up at the night sky: there are thousands of stars in the sky, each with its own unique tale, for every grain of sand on Earth. The universe is big, enigmatic, and incredibly motivating; it invites exploration and creativity.
The stars are awaiting you. What will you do next to comprehend them?
