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Exploring the "G" in Newton's Law of Universal Gravitation

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Sir Isaac Newton's Law of Universal Gravitation helps put the laws of gravity into a mathematical formula. And the gravitational constant is the "G" in that formula.

10 Space Landmarks We'd Like to Visit

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Fling away your Fodor's! Toss your TripAdvisor! We have the only guided tour of outer space you'll need -- a foray into the final frontier so ambitious it will make the Voyager probes' Grand Tours look like daytrips.

If you were to move all of the matter in the universe into one corner, how much space would it take up?

science.howstuffworks.com/dictionary/astronomy-terms/question221.htm

If you took all of the matter in the universe and you pushed it all into one corner, how much space would it take up? I am trying to understand how much of the universe is 'empty.'

Just How Many Galaxies Are in the Universe?

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Galaxies are large systems of stars, gas, dust and dark matter that orbits a center and is bound by gravity. Learn about the characteristics of galaxies.

What is gravity?

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What is gravity? How does gravity affect virtually everything on Earth? Learn about gravity in this article from HowStuffWorks.

Will we ever unite quantum mechanics with general relativity?

science.howstuffworks.com/science-vs-myth/everyday-myths/unite-quantum-mechanics-general-relativity.htm

Einstein showed us a mind-blowing way the universe works, while Max Planck and his gang showed us how particles on the atomic and subatomic levels work. But one doesn't explain the other. So there must be a larger theory encompassing them ... or not?

What is the Milky Way?

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It's your home, and a colossally sized one at that. How much do you know about your galactic digs and their residence amid the yawning universe?

How the James Webb Space Telescope Works

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NASA's James Webb Space Telescope will look back in time to see the earliest stars in creation, and serve as the premier deep space observatory for the next decade. Ready to meet the mighty Webb?

Could a planet exist without a host star?

science.howstuffworks.com/planet-exist-without-host-star.htm

It's not uncommon for planets to wander alone through the universe like big, sullen teenagers. But how do they end up flying solo, and could they still harbor life?

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