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Feb 1, 2022 · While estimates among different experts vary, an acceptable range is between 100 billion and 200 billion galaxies, said Mario Livio, an astrophysicist at the Space Telescope Science...
Sep 29, 2020 · Currently, in 2020, it was estimated that there are around 2 trillion galaxies in the observable Universe. Each galaxy is unique, ranging in size from 10,000 light-years to hundreds of light-years. Galaxies have been classified under five categories: spiral, barred spiral, lenticular, elliptical, and irregular.
Galaxies consist of stars, planets, and vast clouds of gas and dust, all bound together by gravity. The largest contain trillions of stars and can be more than a million light-years across. The smallest can contain a few thousand stars and span just a few hundred light-years.
Recent estimates tell us that there could be as many as two trillion galaxies in the observable Universe.
The observable universe contains as many as an estimated 2 trillion galaxies and, overall, as many as an estimated 10 24 stars – more stars (and, potentially, Earth-like planets) than all the grains of beach sand on planet Earth.
How many galaxies are there in the Universe, and how do we know? One estimate says there are between 100 and 200 billion galaxies.
Jan 31, 2024 · Astronomers classify galaxies into three major categories: elliptical, spiral and irregular. These galaxies span a wide range of sizes, from dwarf galaxies containing as few as 100 million stars to giant galaxies with more than a trillion stars.
