One Question Per PagefalsefalseEarth does not appear to be in any danger from any asteroids that measure one kilometre wide.1We don’t need to worry about small asteroids under 20 metres wide.2A special telescope will provide a complete defence against asteroids hitting Earth.2PHAs are the biggest concern, but they’re still not an immediate threat.1Didymoon’s orbit is not stable.3HAMMER may or may not need nuclear weapons to save Earth from an asteroid.1https://339efcb25eb75e967b0d-ff8eeadd950d51fd1fc939dca75b3973.ssl.cf1.rackcdn.com/assets_default.swf