▶ On Feb. 15th an asteroid about half the size of a football field will fly past Earth closer than many man-made satellites. Since regular sky surveys began in the 1990s, astronomers have never seen an object so big come so close to our planet. asteroid asteroid flyby astronomers nasa nasa television planet satellites sciencecast space exploration videos January 28, 2013 NASA Television ScienceCast: Record-Setting Asteroid Flyby video Read more →
