If you could look down on Earth from space during April's total solar eclipse, you would see the moon cast its shadow on the planet, creating a dark blob that will dart across the land from Mexico into Texas and up toward Maine and Canada.
During a total eclipse, you're plunged into the moon's shadow. You're in this eerie twilight. You can see bright stars and planets in the sky. And of course, the biggest attraction is you see the sun's solar corona. You don't see any of those things in the partial eclipse, even at 99 percent...
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