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Your search for "planetary nebula" returned 25 results
How do planets form?
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Planets and how they form are explained in this article from HowStuffWorks. Learn about planets and planet formation.
How Telescopes Work
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For centuries, curious observers have probed the heavens with the aid of telescopes. Today, both amateur and professional scopes magnify images in a variety of ways.
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?
Will Earth Last Forever?
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Nothing lasts forever. Does that include our home planet, too?
The Solar System: Planets and Formation Explained
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While we generally picture the sun and planets when thinking about our solar system, it also consists of comets, asteroids and hundreds of moons.
Stellarium Is the Free 'Planetarium' for Your Computer
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Not sure what you're seeing in the night sky? Astronomy software such as Stellarium makes stargazing easier by helping to explain what you're seeing when you look at the stars.
22 Astronomical Events to Look Out for in 2023
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Head's up, stargazers! Mark your calendars for the 22 must-see events this year.
How Long Does the Once-dimming Star Betelgeuse Have Left?
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Star-gazers gasped when they saw how much Betelgeuse dimmed in 2019 and the reason wasn't clear. Even though it's back up to full strength, how long will it be before it explodes? We haven't seen a supernova in over 400 years.
The Milky Way: Understanding Our Place in the Galaxy
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A look at the night sky at any time of year will reveal a faint band of light stretching across the sky -- our solar system's home, the Milky Way. How much do we really know about it?
How Asteroid Belts Work
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Asteroid belts may tell us how our very solar system came into existence. Learn all about asteroid belts, from their characteristics to what they can teach us.