Asteroid 2026 CU1 will sweep past Earth this week at high speed, close enough to attract attention yet deemed safe, raising fresh questions about how well we watch the skies. Astronomers are tracking asteroid 2026 CU1 as it approaches Earth this week, offering a close but safe flyby that highlights the importance of constant monitoring of near Earth objects. Scientists say the asteroid will pass on 26 February. It measure... [1976 chars]