this post was submitted on 11 Jul 2026
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How many Earth’s can fit between the Sun and the Heliopause? (sciencecards.org)
submitted 1 week ago by stuartml@piefed.social to c/ScienceOnlyFacts@lemmy.world
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Space is big, really really big. Let’s do some math: Earth has a diameter at the Equator of 7,926 miles. If one astronomical unit (AU) is 92,955,807.3 miles, and the distance between the Sun and the Heliopause is about 123 AU, that’s 11,433,564,297.9 miles ÷ 7,926 miles = 1,442,539…That means 1.4 million Earth’s could fit in a line from the Sun to the Heliopause. The Heliopause is the last boundary between material from the Sun vs other stars from interstellar space. After 35 years of travel, Voyager 1 crossed the Heliopause and entered interstellar space on August 25, 2012. Voyager 1 was launched by NASA on September 5, 1977.

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[–] UncleArthur@lemmy.world 3 points 1 week ago (2 children)

Earth's what?

[–] ThanksObama@sh.itjust.works 1 points 1 week ago

Bubble around the solar system created by the suns magnetic field

[–] HeyJoe@lemmy.world 1 points 1 week ago

It's also the line where the suns gravity no longer has any pull on the objects that exist within that boundry. It is mind boggling just how far you have to travel before it has no effect on you.