Neutron Stars are some of the strangest things in the Universe. Not quite massive enough to become black holes they are basically atoms as big as mountains with properties so extreme it's mind-blowing.

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This video from MinutePhysics explains why we only see one side of the moon.

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This video from MinutePhysics explains how to calculate the size of the sun.

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The sun has two planets in its Goldilocks zone: the Earth and Mars. The crucial difference: a magnetic field that protects us from the sun’s radiation and makes liquid water - and life - possible on Earth.

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This video provides an overview of what a solar wind is, how it forms, and why it is "the biggest obstacle we have for exploring our universe."

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In February 2013, a stunning sight in the sky over Russia made international headlines. The light of an asteroid hurtling toward Earth was brighter than the sun.

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The dinosaurs died off after a massive asteroid strike with a billion times more energy than the atomic bomb dropped on Hiroshima. A team at NASA studies the impact to learn more

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res-backgrounder 

Come explore the lost constellations of North America…

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Astrophysicist Brian May (who also happens to be lead guitarist for the rock band Queen) talks about Asteroid Day (June 30), an event designed to raise awareness of the threat to Earth from asteroids. Learn more at asteroidday.org.

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The 5 most mysterious photographs taken on Mars - from a strange ball of light shining up from the ground to a humanoid shape that looks impossibly like Bigfoot.

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