Nasa resource about the planet from many years ago, now they are successful about this. An asteroid is a form made of stone that moves around its star. The smallest planets in the form of asteroids are much smaller than Mercury. But sometimes astronomers panicked with the strange and terrible asteroids in the solar system @alam1234.
RE: NASA is building a spacecraft to save the planet from asteroids
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NASA is building a spacecraft to save the planet from asteroids