Have we overestimated the number of stars in the Universe?

No matter where we look in space, in any direction, we see that the Universe is filled with stars and galaxies absolutely everywhere. As far as stars go, on a clear, dark night, the naked human eye can see about 6000 of them, but that’s just a tiny fraction of all that’s out there. Our Milky Way galaxy, our cosmic home in the Universe, spans over 100,000 light-years in diameter and contains approximately 400 billion stars. Whereas about 20 years ago, we thought there were about 60 galaxies, total, in our Local Group — with one of them, Andromeda, containing even more stars than we do — we now know that there are likely hundreds of galaxies or more within our Local Group, with most of them being small, low-mass dwarf galaxies, containing fewer than 0.1% of the stars our Milky Way possesses.

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Tags: Number Stars