How Many Stars Are In The Milky Way?

Do the Milky Way's stars number in the millions? Because of the vast amount of stars in our galaxy, it's difficult to estimate the precise number.


How Many Stars Are In The Milky Way?
How Many Stars Are In The Milky Way?

but scientists have developed models based on our best guesses and believe that the Milky Way includes at least 100 billion! In the Milky Way, how many stars are there?

How many stars are there in our galaxy?

Approximately 300 sextillion stars. According to researchers with Western Sydney University, there are approximately 300 sextillion stars in our galaxy — that’s 300 billion trillion, or 3 x 10.

But why stop there? There are also 100 billion galaxies in existence (our own being just one of them). So, once you multiply those numbers together, you come up with a stunningly high number: 3 x 10 , or 30 nonillion .

If you prefer units a little more manageable than that, take note that astronomers have already put a name to this enormous number. It’s called a Yotta, and it’s equal to 1,000 zetta, which is itself equal to 1 sextillion.


How many galaxies are there in the universe?

It is estimated that there are around 200 billion galaxies in existence. How many stars are in each galaxy? Well, most galaxies will have between 100 and 10,000 billion stars within them. So, if we take away all of the empty space (between each star) then we can estimate that there are approximately two trillion stars in our galaxy alone! However, only four percent of these stars have planets orbiting them so what about planets with life on them? There’s no definitive answer to how many planets support life but scientists believe that it may be more common than we think! Now you know: How many galaxies are there in the universe and how many of those contain life... or maybe even an alien civilization!


How did we measure these numbers?


How Many Stars Are In The Milky Way?

How did we measure these numbers?


We used a variety of methods to determine how many stars are in our galaxy.

  • First, we estimated there are about 100 billion stars in our galaxy by looking at previous estimates of star populations and taking into account that only a small percentage of these have been observed so far.
  • We then took into account new observations (made by NASA’s Hubble Space Telescope) that show more distant galaxies have older stars.
  • This means that there are more older stars (and therefore a larger number of total stars) than we previously thought.


What does it mean for us here on Earth

How many stars are in our galaxy, anyway? It's a lot of them—so many that it's nearly impossible to even come up with an exact number. We can say that there are many, many stars in a galaxy that’s roughly 100,000 light-years across. And some scientists estimate there may be as many as 300 sextillion stars (that's a 3 followed by 23 zeros) within range of our telescopes and instruments.

SOURCE : Yasoquiz




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