What if gravity is zero?

If gravity suddenly became zero, the conseuences would be catastrophic. Earth's atmosphere would immediately disperse into space since nothing would hold it down. Oceans, lakes, and all water would float away. People, animals, buildings, and objects not anchored down would drift into space. Earth itself would disintegrate since gravity holds the planet together. The Moon would fly off on a tangent rather than orbiting. The Sun would explode without gravity compressing its core to sustain nuclear fusion. In fact, the entire universe would unravel gravity is essential for forming and maintaining stars, planets, galaxies, and the large-scale structure of the cosmos.