... Possible Pluto Moons . ... Epimetheus and Janus, two small moons of Saturn, actually switch positions as they orbit their home planet. ... But on 2003 August 29th the red planet Mars, near its closest approach to Earth in almost 60,000 years, shone brightly in the sky against a background of stars in the constellation Aquarius. ... This October, Mars has become a bright, yellowish star in planet Earth's sky as it approaches oppositon, the period when Mars and Earth pass close as they orbit the Sun. ...